芝麻web文件管理V1.00

编辑当前文件:/home2/sdektunc/cepali.edu.mx/wp-includes/customize/functions-20241117112246-20241118033436.php

<?php
/**
 * Main WordPress API
 *
 * @package WordPress
 */

require ABSPATH . WPINC . '/option.php';

/**
 * Converts given MySQL date string into a different format.
 *
 *  - `$format` should be a PHP date format string.
 *  - 'U' and 'G' formats will return an integer sum of timestamp with timezone offset.
 *  - `$date` is expected to be local time in MySQL format (`Y-m-d H:i:s`).
 *
 * Historically UTC time could be passed to the function to produce Unix timestamp.
 *
 * If `$translate` is true then the given date and format string will
 * be passed to `wp_date()` for translation.
 *
 * @since 0.71
 *
 * @param string $format    Format of the date to return.
 * @param string $date      Date string to convert.
 * @param bool   $translate Whether the return date should be translated. Default true.
 * @return string|int|false Integer if `$format` is 'U' or 'G', string otherwise.
 *                          False on failure.
 */
function mysql2date( $format, $date, $translate = true ) {
	if ( empty( $date ) ) {
		return false;
	}

$timezone = wp_timezone();
	$datetime = date_create( $date, $timezone );

if ( false === $datetime ) {
		return false;
	}

// Returns a sum of timestamp with timezone offset. Ideally should never be used.
	if ( 'G' === $format || 'U' === $format ) {
		return $datetime->getTimestamp() + $datetime->getOffset();
	}

if ( $translate ) {
		return wp_date( $format, $datetime->getTimestamp(), $timezone );
	}

return $datetime->format( $format );
}

/**
 * Retrieves the current time based on specified type.
 *
 *  - The 'mysql' type will return the time in the format for MySQL DATETIME field.
 *  - The 'timestamp' or 'U' types will return the current timestamp or a sum of timestamp
 *    and timezone offset, depending on `$gmt`.
 *  - Other strings will be interpreted as PHP date formats (e.g. 'Y-m-d').
 *
 * If `$gmt` is a truthy value then both types will use GMT time, otherwise the
 * output is adjusted with the GMT offset for the site.
 *
 * @since 1.0.0
 * @since 5.3.0 Now returns an integer if `$type` is 'U'. Previously a string was returned.
 *
 * @param string   $type Type of time to retrieve. Accepts 'mysql', 'timestamp', 'U',
 *                       or PHP date format string (e.g. 'Y-m-d').
 * @param int|bool $gmt  Optional. Whether to use GMT timezone. Default false.
 * @return int|string Integer if `$type` is 'timestamp' or 'U', string otherwise.
 */
function current_time( $type, $gmt = 0 ) {
	// Don't use non-GMT timestamp, unless you know the difference and really need to.
	if ( 'timestamp' === $type || 'U' === $type ) {
		return $gmt ? time() : time() + (int) ( get_option( 'gmt_offset' ) * HOUR_IN_SECONDS );
	}

if ( 'mysql' === $type ) {
		$type = 'Y-m-d H:i:s';
	}

$timezone = $gmt ? new DateTimeZone( 'UTC' ) : wp_timezone();
	$datetime = new DateTime( 'now', $timezone );

return $datetime->format( $type );
}

/**
 * Retrieves the current time as an object using the site's timezone.
 *
 * @since 5.3.0
 *
 * @return DateTimeImmutable Date and time object.
 */
function current_datetime() {
	return new DateTimeImmutable( 'now', wp_timezone() );
}

/**
 * Retrieves the timezone of the site as a string.
 *
 * Uses the `timezone_string` option to get a proper timezone name if available,
 * otherwise falls back to a manual UTC ± offset.
 *
 * Example return values:
 *
 *  - 'Europe/Rome'
 *  - 'America/North_Dakota/New_Salem'
 *  - 'UTC'
 *  - '-06:30'
 *  - '+00:00'
 *  - '+08:45'
 *
 * @since 5.3.0
 *
 * @return string PHP timezone name or a ±HH:MM offset.
 */
function wp_timezone_string() {
	$timezone_string = get_option( 'timezone_string' );

if ( $timezone_string ) {
		return $timezone_string;
	}

$offset  = (float) get_option( 'gmt_offset' );
	$hours   = (int) $offset;
	$minutes = ( $offset - $hours );

$sign = ( $offset < 0 ) ? '-' : '+';
	$abs_hour = abs( $hours );
	$abs_mins = abs( $minutes * 60 );
	$tz_offset = sprintf( '%s%02d:%02d', $sign, $abs_hour, $abs_mins );

return $tz_offset;
}

/**
 * Retrieves the timezone of the site as a `DateTimeZone` object.
 *
 * Timezone can be based on a PHP timezone string or a ±HH:MM offset.
 *
 * @since 5.3.0
 *
 * @return DateTimeZone Timezone object.
 */
function wp_timezone() {
	return new DateTimeZone( wp_timezone_string() );
}

/**
 * Retrieves the date in localized format, based on a sum of Unix timestamp and
 * timezone offset in seconds.
 *
 * If the locale specifies the locale month and weekday, then the locale will
 * take over the format for the date. If it isn't, then the date format string
 * will be used instead.
 *
 * Note that due to the way WP typically generates a sum of timestamp and offset
 * with `strtotime()`, it implies offset added at a _current_ time, not at the time
 * the timestamp represents. Storing such timestamps or calculating them differently
 * will lead to invalid output.
 *
 * @since 0.71
 * @since 5.3.0 Converted into a wrapper for wp_date().
 *
 * @param string   $format                Format to display the date.
 * @param int|bool $timestamp_with_offset Optional. A sum of Unix timestamp and timezone offset
 *                                        in seconds. Default false.
 * @param bool     $gmt                   Optional. Whether to use GMT timezone. Only applies
 *                                        if timestamp is not provided. Default false.
 * @return string The date, translated if locale specifies it.
 */
function date_i18n( $format, $timestamp_with_offset = false, $gmt = false ) {
	$timestamp = $timestamp_with_offset;

// If timestamp is omitted it should be current time (summed with offset, unless `$gmt` is true).
	if ( ! is_numeric( $timestamp ) ) {
		// phpcs:ignore WordPress.DateTime.CurrentTimeTimestamp.Requested
		$timestamp = current_time( 'timestamp', $gmt );
	}

/*
	 * This is a legacy implementation quirk that the returned timestamp is also with offset.
	 * Ideally this function should never be used to produce a timestamp.
	 */
	if ( 'U' === $format ) {
		$date = $timestamp;
	} elseif ( $gmt && false === $timestamp_with_offset ) { // Current time in UTC.
		$date = wp_date( $format, null, new DateTimeZone( 'UTC' ) );
	} elseif ( false === $timestamp_with_offset ) { // Current time in site's timezone.
		$date = wp_date( $format );
	} else {
		/*
		 * Timestamp with offset is typically produced by a UTC `strtotime()` call on an input without timezone.
		 * This is the best attempt to reverse that operation into a local time to use.
		 */
		$local_time = gmdate( 'Y-m-d H:i:s', $timestamp );
		$timezone   = wp_timezone();
		$datetime   = date_create( $local_time, $timezone );
		$date       = wp_date( $format, $datetime->getTimestamp(), $timezone );
	}

/**
	 * Filters the date formatted based on the locale.
	 *
	 * @since 2.8.0
	 *
	 * @param string $date      Formatted date string.
	 * @param string $format    Format to display the date.
	 * @param int    $timestamp A sum of Unix timestamp and timezone offset in seconds.
	 *                          Might be without offset if input omitted timestamp but requested GMT.
	 * @param bool   $gmt       Whether to use GMT timezone. Only applies if timestamp was not provided.
	 *                          Default false.
	 */
	$date = apply_filters( 'date_i18n', $date, $format, $timestamp, $gmt );

return $date;
}

/**
 * Retrieves the date, in localized format.
 *
 * This is a newer function, intended to replace `date_i18n()` without legacy quirks in it.
 *
 * Note that, unlike `date_i18n()`, this function accepts a true Unix timestamp, not summed
 * with timezone offset.
 *
 * @since 5.3.0
 *
 * @global WP_Locale $wp_locale WordPress date and time locale object.
 *
 * @param string       $format    PHP date format.
 * @param int          $timestamp Optional. Unix timestamp. Defaults to current time.
 * @param DateTimeZone $timezone  Optional. Timezone to output result in. Defaults to timezone
 *                                from site settings.
 * @return string|false The date, translated if locale specifies it. False on invalid timestamp input.
 */
function wp_date( $format, $timestamp = null, $timezone = null ) {
	global $wp_locale;

if ( null === $timestamp ) {
		$timestamp = time();
	} elseif ( ! is_numeric( $timestamp ) ) {
		return false;
	}

if ( ! $timezone ) {
		$timezone = wp_timezone();
	}

$datetime = date_create( '@' . $timestamp );
	$datetime->setTimezone( $timezone );

if ( empty( $wp_locale->month ) || empty( $wp_locale->weekday ) ) {
		$date = $datetime->format( $format );
	} else {
		// We need to unpack shorthand `r` format because it has parts that might be localized.
		$format = preg_replace( '/(?<!\\\\)r/', DATE_RFC2822, $format );

$new_format    = '';
		$format_length = strlen( $format );
		$month         = $wp_locale->get_month( $datetime->format( 'm' ) );
		$weekday       = $wp_locale->get_weekday( $datetime->format( 'w' ) );

for ( $i = 0; $i < $format_length; $i++ ) {
			switch ( $format[ $i ] ) {
				case 'D':
					$new_format .= addcslashes( $wp_locale->get_weekday_abbrev( $weekday ), '\\A..Za..z' );
					break;
				case 'F':
					$new_format .= addcslashes( $month, '\\A..Za..z' );
					break;
				case 'l':
					$new_format .= addcslashes( $weekday, '\\A..Za..z' );
					break;
				case 'M':
					$new_format .= addcslashes( $wp_locale->get_month_abbrev( $month ), '\\A..Za..z' );
					break;
				case 'a':
					$new_format .= addcslashes( $wp_locale->get_meridiem( $datetime->format( 'a' ) ), '\\A..Za..z' );
					break;
				case 'A':
					$new_format .= addcslashes( $wp_locale->get_meridiem( $datetime->format( 'A' ) ), '\\A..Za..z' );
					break;
				case '\\':
					$new_format .= $format[ $i ];

// If character follows a slash, we add it without translating.
					if ( $i < $format_length ) {
						$new_format .= $format[ ++$i ];
					}
					break;
				default:
					$new_format .= $format[ $i ];
					break;
			}
		}

$date = $datetime->format( $new_format );
		$date = wp_maybe_decline_date( $date, $format );
	}

/**
	 * Filters the date formatted based on the locale.
	 *
	 * @since 5.3.0
	 *
	 * @param string       $date      Formatted date string.
	 * @param string       $format    Format to display the date.
	 * @param int          $timestamp Unix timestamp.
	 * @param DateTimeZone $timezone  Timezone.
	 */
	$date = apply_filters( 'wp_date', $date, $format, $timestamp, $timezone );

return $date;
}

/**
 * Determines if the date should be declined.
 *
 * If the locale specifies that month names require a genitive case in certain
 * formats (like 'j F Y'), the month name will be replaced with a correct form.
 *
 * @since 4.4.0
 * @since 5.4.0 The `$format` parameter was added.
 *
 * @global WP_Locale $wp_locale WordPress date and time locale object.
 *
 * @param string $date   Formatted date string.
 * @param string $format Optional. Date format to check. Default empty string.
 * @return string The date, declined if locale specifies it.
 */
function wp_maybe_decline_date( $date, $format = '' ) {
	global $wp_locale;

// i18n functions are not available in SHORTINIT mode.
	if ( ! function_exists( '_x' ) ) {
		return $date;
	}

/*
	 * translators: If months in your language require a genitive case,
	 * translate this to 'on'. Do not translate into your own language.
	 */
	if ( 'on' === _x( 'off', 'decline months names: on or off' ) ) {

$months          = $wp_locale->month;
		$months_genitive = $wp_locale->month_genitive;

/*
		 * Match a format like 'j F Y' or 'j. F' (day of the month, followed by month name)
		 * and decline the month.
		 */
		if ( $format ) {
			$decline = preg_match( '#[dj]\.? F#', $format );
		} else {
			// If the format is not passed, try to guess it from the date string.
			$decline = preg_match( '#\b\d{1,2}\.? [^\d ]+\b#u', $date );
		}

if ( $decline ) {
			foreach ( $months as $key => $month ) {
				$months[ $key ] = '# ' . preg_quote( $month, '#' ) . '\b#u';
			}

foreach ( $months_genitive as $key => $month ) {
				$months_genitive[ $key ] = ' ' . $month;
			}

$date = preg_replace( $months, $months_genitive, $date );
		}

/*
		 * Match a format like 'F jS' or 'F j' (month name, followed by day with an optional ordinal suffix)
		 * and change it to declined 'j F'.
		 */
		if ( $format ) {
			$decline = preg_match( '#F [dj]#', $format );
		} else {
			// If the format is not passed, try to guess it from the date string.
			$decline = preg_match( '#\b[^\d ]+ \d{1,2}(st|nd|rd|th)?\b#u', trim( $date ) );
		}

if ( $decline ) {
			foreach ( $months as $key => $month ) {
				$months[ $key ] = '#\b' . preg_quote( $month, '#' ) . ' (\d{1,2})(st|nd|rd|th)?([-–]\d{1,2})?(st|nd|rd|th)?\b#u';
			}

foreach ( $months_genitive as $key => $month ) {
				$months_genitive[ $key ] = '$1$3 ' . $month;
			}

$date = preg_replace( $months, $months_genitive, $date );
		}
	}

// Used for locale-specific rules.
	$locale = get_locale();

if ( 'ca' === $locale ) {
		// " de abril| de agost| de octubre..." -> " d'abril| d'agost| d'octubre..."
		$date = preg_replace( '# de ([ao])#i', " d'\\1", $date );
	}

return $date;
}

/**
 * Converts float number to format based on the locale.
 *
 * @since 2.3.0
 *
 * @global WP_Locale $wp_locale WordPress date and time locale object.
 *
 * @param float $number   The number to convert based on locale.
 * @param int   $decimals Optional. Precision of the number of decimal places. Default 0.
 * @return string Converted number in string format.
 */
function number_format_i18n( $number, $decimals = 0 ) {
	global $wp_locale;

if ( isset( $wp_locale ) ) {
		$formatted = number_format( $number, absint( $decimals ), $wp_locale->number_format['decimal_point'], $wp_locale->number_format['thousands_sep'] );
	} else {
		$formatted = number_format( $number, absint( $decimals ) );
	}

/**
	 * Filters the number formatted based on the locale.
	 *
	 * @since 2.8.0
	 * @since 4.9.0 The `$number` and `$decimals` parameters were added.
	 *
	 * @param string $formatted Converted number in string format.
	 * @param float  $number    The number to convert based on locale.
	 * @param int    $decimals  Precision of the number of decimal places.
	 */
	return apply_filters( 'number_format_i18n', $formatted, $number, $decimals );
}

/**
 * Converts a number of bytes to the largest unit the bytes will fit into.
 *
 * It is easier to read 1 KB than 1024 bytes and 1 MB than 1048576 bytes. Converts
 * number of bytes to human readable number by taking the number of that unit
 * that the bytes will go into it. Supports YB value.
 *
 * Please note that integers in PHP are limited to 32 bits, unless they are on
 * 64 bit architecture, then they have 64 bit size. If you need to place the
 * larger size then what PHP integer type will hold, then use a string. It will
 * be converted to a double, which should always have 64 bit length.
 *
 * Technically the correct unit names for powers of 1024 are KiB, MiB etc.
 *
 * @since 2.3.0
 * @since 6.0.0 Support for PB, EB, ZB, and YB was added.
 *
 * @param int|string $bytes    Number of bytes. Note max integer size for integers.
 * @param int        $decimals Optional. Precision of number of decimal places. Default 0.
 * @return string|false Number string on success, false on failure.
 */
function size_format( $bytes, $decimals = 0 ) {
	$quant = array(
		/* translators: Unit symbol for yottabyte. */
		_x( 'YB', 'unit symbol' ) => YB_IN_BYTES,
		/* translators: Unit symbol for zettabyte. */
		_x( 'ZB', 'unit symbol' ) => ZB_IN_BYTES,
		/* translators: Unit symbol for exabyte. */
		_x( 'EB', 'unit symbol' ) => EB_IN_BYTES,
		/* translators: Unit symbol for petabyte. */
		_x( 'PB', 'unit symbol' ) => PB_IN_BYTES,
		/* translators: Unit symbol for terabyte. */
		_x( 'TB', 'unit symbol' ) => TB_IN_BYTES,
		/* translators: Unit symbol for gigabyte. */
		_x( 'GB', 'unit symbol' ) => GB_IN_BYTES,
		/* translators: Unit symbol for megabyte. */
		_x( 'MB', 'unit symbol' ) => MB_IN_BYTES,
		/* translators: Unit symbol for kilobyte. */
		_x( 'KB', 'unit symbol' ) => KB_IN_BYTES,
		/* translators: Unit symbol for byte. */
		_x( 'B', 'unit symbol' )  => 1,
	);

if ( 0 === $bytes ) {
		/* translators: Unit symbol for byte. */
		return number_format_i18n( 0, $decimals ) . ' ' . _x( 'B', 'unit symbol' );
	}

foreach ( $quant as $unit => $mag ) {
		if ( (float) $bytes >= $mag ) {
			return number_format_i18n( $bytes / $mag, $decimals ) . ' ' . $unit;
		}
	}

return false;
}

/**
 * Converts a duration to human readable format.
 *
 * @since 5.1.0
 *
 * @param string $duration Duration will be in string format (HH:ii:ss) OR (ii:ss),
 *                         with a possible prepended negative sign (-).
 * @return string|false A human readable duration string, false on failure.
 */
function human_readable_duration( $duration = '' ) {
	if ( ( empty( $duration ) || ! is_string( $duration ) ) ) {
		return false;
	}

$duration = trim( $duration );

// Remove prepended negative sign.
	if ( str_starts_with( $duration, '-' ) ) {
		$duration = substr( $duration, 1 );
	}

// Extract duration parts.
	$duration_parts = array_reverse( explode( ':', $duration ) );
	$duration_count = count( $duration_parts );

$hour   = null;
	$minute = null;
	$second = null;

if ( 3 === $duration_count ) {
		// Validate HH:ii:ss duration format.
		if ( ! ( (bool) preg_match( '/^([0-9]+):([0-5]?[0-9]):([0-5]?[0-9])$/', $duration ) ) ) {
			return false;
		}
		// Three parts: hours, minutes & seconds.
		list( $second, $minute, $hour ) = $duration_parts;
	} elseif ( 2 === $duration_count ) {
		// Validate ii:ss duration format.
		if ( ! ( (bool) preg_match( '/^([0-5]?[0-9]):([0-5]?[0-9])$/', $duration ) ) ) {
			return false;
		}
		// Two parts: minutes & seconds.
		list( $second, $minute ) = $duration_parts;
	} else {
		return false;
	}

$human_readable_duration = array();

// Add the hour part to the string.
	if ( is_numeric( $hour ) ) {
		/* translators: %s: Time duration in hour or hours. */
		$human_readable_duration[] = sprintf( _n( '%s hour', '%s hours', $hour ), (int) $hour );
	}

// Add the minute part to the string.
	if ( is_numeric( $minute ) ) {
		/* translators: %s: Time duration in minute or minutes. */
		$human_readable_duration[] = sprintf( _n( '%s minute', '%s minutes', $minute ), (int) $minute );
	}

// Add the second part to the string.
	if ( is_numeric( $second ) ) {
		/* translators: %s: Time duration in second or seconds. */
		$human_readable_duration[] = sprintf( _n( '%s second', '%s seconds', $second ), (int) $second );
	}

return implode( ', ', $human_readable_duration );
}

/**
 * Gets the week start and end from the datetime or date string from MySQL.
 *
 * @since 0.71
 *
 * @param string     $mysqlstring   Date or datetime field type from MySQL.
 * @param int|string $start_of_week Optional. Start of the week as an integer. Default empty string.
 * @return int[] {
 *     Week start and end dates as Unix timestamps.
 *
 *     @type int $start The week start date as a Unix timestamp.
 *     @type int $end   The week end date as a Unix timestamp.
 * }
 */
function get_weekstartend( $mysqlstring, $start_of_week = '' ) {
	// MySQL string year.
	$my = substr( $mysqlstring, 0, 4 );

// MySQL string month.
	$mm = substr( $mysqlstring, 8, 2 );

// MySQL string day.
	$md = substr( $mysqlstring, 5, 2 );

// The timestamp for MySQL string day.
	$day = mktime( 0, 0, 0, $md, $mm, $my );

// The day of the week from the timestamp.
	$weekday = gmdate( 'w', $day );

if ( ! is_numeric( $start_of_week ) ) {
		$start_of_week = get_option( 'start_of_week' );
	}

if ( $weekday < $start_of_week ) {
		$weekday += 7;
	}

// The most recent week start day on or before $day.
	$start = $day - DAY_IN_SECONDS * ( $weekday - $start_of_week );

// $start + 1 week - 1 second.
	$end = $start + WEEK_IN_SECONDS - 1;
	return compact( 'start', 'end' );
}

/**
 * Serializes data, if needed.
 *
 * @since 2.0.5
 *
 * @param string|array|object $data Data that might be serialized.
 * @return mixed A scalar data.
 */
function maybe_serialize( $data ) {
	if ( is_array( $data ) || is_object( $data ) ) {
		return serialize( $data );
	}

/*
	 * Double serialization is required for backward compatibility.
	 * See https://core.trac.wordpress.org/ticket/12930
	 * Also the world will end. See WP 3.6.1.
	 */
	if ( is_serialized( $data, false ) ) {
		return serialize( $data );
	}

return $data;
}

/**
 * Unserializes data only if it was serialized.
 *
 * @since 2.0.0
 *
 * @param string $data Data that might be unserialized.
 * @return mixed Unserialized data can be any type.
 */
function maybe_unserialize( $data ) {
	if ( is_serialized( $data ) ) { // Don't attempt to unserialize data that wasn't serialized going in.
		return @unserialize( trim( $data ) );
	}

return $data;
}

/**
 * Checks value to find if it was serialized.
 *
 * If $data is not a string, then returned value will always be false.
 * Serialized data is always a string.
 *
 * @since 2.0.5
 * @since 6.1.0 Added Enum support.
 *
 * @param string $data Value to check to see if was serialized.
 * @param bool $strict Optional. Whether to be strict about the end of the string. Default true.
 * @return bool False if not serialized and true if it was.
 */
function is_serialized( $data, $strict = true ) {
	// If it isn't a string, it isn't serialized.
	if ( ! is_string( $data ) ) {
		return false;
	}
	$data = trim( $data );
	if ( 'N;' === $data ) {
		return true;
	}
	if ( strlen( $data ) < 4 ) {
		return false;
	}
	if ( ':' !== $data[1] ) {
		return false;
	}
	if ( $strict ) {
		$lastc = substr( $data, -1 );
		if ( ';' !== $lastc && '}' !== $lastc ) {
			return false;
		}
	} else {
		$semicolon = strpos( $data, ';' );
		$brace = strpos( $data, '}' );
		// Either ; or } must exist.
		if ( false === $semicolon && false === $brace ) {
			return false;
		}
		// But neither must be in the first X characters.
		if ( false !== $semicolon && $semicolon < 3 ) {
			return false;
		}
		if ( false !== $brace && $brace < 4 ) {
			return false;
		}
	}
	$token = $data[0];
	switch ( $token ) {
		case 's':
			if ( $strict ) {
				if ( '"' !== substr( $data, -2, 1 ) ) {
					return false;
				}
			} elseif ( ! str_contains( $data, '"' ) ) {
				return false;
			}
			// Or else fall through.
		case 'a':
		case 'O':
		case 'E':
			return (bool) preg_match( "/^{$token}:[0-9]+:/s", $data );
		case 'b':
		case 'i':
		case 'd':
			$end = $strict ? '$' : '';
			return (bool) preg_match( "/^{$token}:[0-9.E+-]+;$end/", $data );
	}
	return false;
}

/**
 * Checks whether serialized data is of string type.
 *
 * @since 2.0.5
 *
 * @param string $data Serialized data.
 * @return bool False if not a serialized string, true if it is.
 */
function is_serialized_string( $data ) {
	// if it isn't a string, it isn't a serialized string.
	if ( ! is_string( $data ) ) {
		return false;
	}
	$data = trim( $data );
	if ( strlen( $data ) < 4 ) {
		return false;
	} elseif ( ':' !== $data[1] ) {
		return false;
	} elseif ( ! str_ends_with( $data, ';' ) ) {
		return false;
	} elseif ( 's' !== $data[0] ) {
		return false;
	} elseif ( '"' !== substr( $data, -2, 1 ) ) {
		return false;
	} else {
		return true;
	}
}

/**
 * Retrieves post title from XMLRPC XML.
 *
 * If the title element is not part of the XML, then the default post title from
 * the $post_default_title will be used instead.
 *
 * @since 0.71
 *
 * @global string $post_default_title Default XML-RPC post title.
 *
 * @param string $content XMLRPC XML Request content
 * @return string Post title
 */
function xmlrpc_getposttitle( $content ) {
	global $post_default_title;
	if ( preg_match( '/<title>(.+?)<\/title>/is', $content, $matchtitle ) ) {
		$post_title = $matchtitle[1];
	} else {
		$post_title = $post_default_title;
	}
	return $post_title;
}

/**
 * Retrieves the post category or categories from XMLRPC XML.
 *
 * If the category element is not found, then the default post category will be
 * used. The return type then would be what $post_default_category. If the
 * category is found, then it will always be an array.
 *
 * @since 0.71
 *
 * @global string $post_default_category Default XML-RPC post category.
 *
 * @param string $content XMLRPC XML Request content
 * @return string|array List of categories or category name.
 */
function xmlrpc_getpostcategory( $content ) {
	global $post_default_category;
	if ( preg_match( '/<category>(.+?)<\/category>/is', $content, $matchcat ) ) {
		$post_category = trim( $matchcat[1], ',' );
		$post_category = explode( ',', $post_category );
	} else {
		$post_category = $post_default_category;
	}
	return $post_category;
}

/**
 * XMLRPC XML content without title and category elements.
 *
 * @since 0.71
 *
 * @param string $content XML-RPC XML Request content.
 * @return string XMLRPC XML Request content without title and category elements.
 */
function xmlrpc_removepostdata( $content ) {
	$content = preg_replace( '/<title>(.+?)<\/title>/si', '', $content );
	$content = preg_replace( '/<category>(.+?)<\/category>/si', '', $content );
	$content = trim( $content );
	return $content;
}

/**
 * Uses RegEx to extract URLs from arbitrary content.
 *
 * @since 3.7.0
 * @since 6.0.0 Fixes support for HTML entities (Trac 30580).
 *
 * @param string $content Content to extract URLs from.
 * @return string[] Array of URLs found in passed string.
 */
function wp_extract_urls( $content ) {
	preg_match_all(
		"#([\"']?)("
			. '(?:([\w-]+:)?//?)'
			. '[^\s()<>]+'
			. '[.]'
			. '(?:'
				. '$[\w\d]+$|'
				. '(?:'
					. "[^`!()\[\]{}:'\".,<>«»“”‘’\s]|"
					. '(?:[:]\d+)?/?'
				. ')+'
			. ')'
		. ")\\1#",
		$content,
		$post_links
	);

$post_links = array_unique(
		array_map(
			static function ( $link ) {
				// Decode to replace valid entities, like &.
				$link = html_entity_decode( $link );
				// Maintain backward compatibility by removing extraneous semi-colons (`;`).
				return str_replace( ';', '', $link );
			},
			$post_links[2]
		)
	);

return array_values( $post_links );
}

/**
 * Checks content for video and audio links to add as enclosures.
 *
 * Will not add enclosures that have already been added and will
 * remove enclosures that are no longer in the post. This is called as
 * pingbacks and trackbacks.
 *
 * @since 1.5.0
 * @since 5.3.0 The `$content` parameter was made optional, and the `$post` parameter was
 *              updated to accept a post ID or a WP_Post object.
 * @since 5.6.0 The `$content` parameter is no longer optional, but passing `null` to skip it
 *              is still supported.
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @param string|null $content Post content. If `null`, the `post_content` field from `$post` is used.
 * @param int|WP_Post $post    Post ID or post object.
 * @return void|false Void on success, false if the post is not found.
 */
function do_enclose( $content, $post ) {
	global $wpdb;

// @todo Tidy this code and make the debug code optional.
	require_once ABSPATH . WPINC . '/class-IXR.php';

$post = get_post( $post );
	if ( ! $post ) {
		return false;
	}

if ( null === $content ) {
		$content = $post->post_content;
	}

$post_links = array();

$pung = get_enclosed( $post->ID );

$post_links_temp = wp_extract_urls( $content );

foreach ( $pung as $link_test ) {
		// Link is no longer in post.
		if ( ! in_array( $link_test, $post_links_temp, true ) ) {
			$mids = $wpdb->get_col( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE post_id = %d AND meta_key = 'enclosure' AND meta_value LIKE %s", $post->ID, $wpdb->esc_like( $link_test ) . '%' ) );
			foreach ( $mids as $mid ) {
				delete_metadata_by_mid( 'post', $mid );
			}
		}
	}

foreach ( (array) $post_links_temp as $link_test ) {
		// If we haven't pung it already.
		if ( ! in_array( $link_test, $pung, true ) ) {
			$test = parse_url( $link_test );
			if ( false === $test ) {
				continue;
			}
			if ( isset( $test['query'] ) ) {
				$post_links[] = $link_test;
			} elseif ( isset( $test['path'] ) && ( '/' !== $test['path'] ) && ( '' !== $test['path'] ) ) {
				$post_links[] = $link_test;
			}
		}
	}

/**
	 * Filters the list of enclosure links before querying the database.
	 *
	 * Allows for the addition and/or removal of potential enclosures to save
	 * to postmeta before checking the database for existing enclosures.
	 *
	 * @since 4.4.0
	 *
	 * @param string[] $post_links An array of enclosure links.
	 * @param int      $post_id    Post ID.
	 */
	$post_links = apply_filters( 'enclosure_links', $post_links, $post->ID );

foreach ( (array) $post_links as $url ) {
		$url = strip_fragment_from_url( $url );

if ( '' !== $url && ! $wpdb->get_var( $wpdb->prepare( "SELECT post_id FROM $wpdb->postmeta WHERE post_id = %d AND meta_key = 'enclosure' AND meta_value LIKE %s", $post->ID, $wpdb->esc_like( $url ) . '%' ) ) ) {

$headers = wp_get_http_headers( $url );
			if ( $headers ) {
				$len           = isset( $headers['Content-Length'] ) ? (int) $headers['Content-Length'] : 0;
				$type          = isset( $headers['Content-Type'] ) ? $headers['Content-Type'] : '';
				$allowed_types = array( 'video', 'audio' );

// Check to see if we can figure out the mime type from the extension.
				$url_parts = parse_url( $url );
				if ( false !== $url_parts && ! empty( $url_parts['path'] ) ) {
					$extension = pathinfo( $url_parts['path'], PATHINFO_EXTENSION );
					if ( ! empty( $extension ) ) {
						foreach ( wp_get_mime_types() as $exts => $mime ) {
							if ( preg_match( '!^(' . $exts . ')$!i', $extension ) ) {
								$type = $mime;
								break;
							}
						}
					}
				}

if ( in_array( substr( $type, 0, strpos( $type, '/' ) ), $allowed_types, true ) ) {
					add_post_meta( $post->ID, 'enclosure', "$url\n$len\n$mime\n" );
				}
			}
		}
	}
}

/**
 * Retrieves HTTP Headers from URL.
 *
 * @since 1.5.1
 *
 * @param string $url        URL to retrieve HTTP headers from.
 * @param bool   $deprecated Not Used.
 * @return \WpOrg\Requests\Utility\CaseInsensitiveDictionary|false Headers on success, false on failure.
 */
function wp_get_http_headers( $url, $deprecated = false ) {
	if ( ! empty( $deprecated ) ) {
		_deprecated_argument( __FUNCTION__, '2.7.0' );
	}

$response = wp_safe_remote_head( $url );

if ( is_wp_error( $response ) ) {
		return false;
	}

return wp_remote_retrieve_headers( $response );
}

/**
 * Determines whether the publish date of the current post in the loop is different
 * from the publish date of the previous post in the loop.
 *
 * For more information on this and similar theme functions, check out
 * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
 * Conditional Tags} article in the Theme Developer Handbook.
 *
 * @since 0.71
 *
 * @global string $currentday  The day of the current post in the loop.
 * @global string $previousday The day of the previous post in the loop.
 *
 * @return int 1 when new day, 0 if not a new day.
 */
function is_new_day() {
	global $currentday, $previousday;

if ( $currentday !== $previousday ) {
		return 1;
	} else {
		return 0;
	}
}

/**
 * Builds URL query based on an associative and, or indexed array.
 *
 * This is a convenient function for easily building url queries. It sets the
 * separator to '&' and uses _http_build_query() function.
 *
 * @since 2.3.0
 *
 * @see _http_build_query() Used to build the query
 * @link https://www.php.net/manual/en/function.http-build-query.php for more on what
 *       http_build_query() does.
 *
 * @param array $data URL-encode key/value pairs.
 * @return string URL-encoded string.
 */
function build_query( $data ) {
	return _http_build_query( $data, null, '&', '', false );
}

/**
 * From php.net (modified by Mark Jaquith to behave like the native PHP5 function).
 *
 * @since 3.2.0
 * @access private
 *
 * @see https://www.php.net/manual/en/function.http-build-query.php
 *
 * @param array|object $data      An array or object of data. Converted to array.
 * @param string       $prefix    Optional. Numeric index. If set, start parameter numbering with it.
 *                                Default null.
 * @param string       $sep       Optional. Argument separator; defaults to 'arg_separator.output'.
 *                                Default null.
 * @param string       $key       Optional. Used to prefix key name. Default empty string.
 * @param bool         $urlencode Optional. Whether to use urlencode() in the result. Default true.
 * @return string The query string.
 */
function _http_build_query( $data, $prefix = null, $sep = null, $key = '', $urlencode = true ) {
	$ret = array();

foreach ( (array) $data as $k => $v ) {
		if ( $urlencode ) {
			$k = urlencode( $k );
		}

if ( is_int( $k ) && null !== $prefix ) {
			$k = $prefix . $k;
		}

if ( ! empty( $key ) ) {
			$k = $key . '%5B' . $k . '%5D';
		}

if ( null === $v ) {
			continue;
		} elseif ( false === $v ) {
			$v = '0';
		}

if ( is_array( $v ) || is_object( $v ) ) {
			array_push( $ret, _http_build_query( $v, '', $sep, $k, $urlencode ) );
		} elseif ( $urlencode ) {
			array_push( $ret, $k . '=' . urlencode( $v ) );
		} else {
			array_push( $ret, $k . '=' . $v );
		}
	}

if ( null === $sep ) {
		$sep = ini_get( 'arg_separator.output' );
	}

return implode( $sep, $ret );
}

/**
 * Retrieves a modified URL query string.
 *
 * You can rebuild the URL and append query variables to the URL query by using this function.
 * There are two ways to use this function; either a single key and value, or an associative array.
 *
 * Using a single key and value:
 *
 * add_query_arg( 'key', 'value', 'http://example.com' );
 *
 * Using an associative array:
 *
 * add_query_arg( array(
 * 'key1' => 'value1',
 * 'key2' => 'value2',
 * ), 'http://example.com' );
 *
 * Omitting the URL from either use results in the current URL being used
 * (the value of `$_SERVER['REQUEST_URI']`).
 *
 * Values are expected to be encoded appropriately with urlencode() or rawurlencode().
 *
 * Setting any query variable's value to boolean false removes the key (see remove_query_arg()).
 *
 * Important: The return value of add_query_arg() is not escaped by default. Output should be
 * late-escaped with esc_url() or similar to help prevent vulnerability to cross-site scripting
 * (XSS) attacks.
 *
 * @since 1.5.0
 * @since 5.3.0 Formalized the existing and already documented parameters
 * by adding `...$args` to the function signature.
 *
 * @param string|array $key Either a query variable key, or an associative array of query variables.
 * @param string $value Optional. Either a query variable value, or a URL to act upon.
 * @param string $url Optional. A URL to act upon.
 * @return string New URL query string (unescaped).
 */
function add_query_arg( ...$args ) {
	if ( is_array( $args[0] ) ) {
		if ( count( $args ) < 2 || false === $args[1] ) {
			$uri = $_SERVER['REQUEST_URI'];
		} else {
			$uri = $args[1];
		}
	} else {
		if ( count( $args ) < 3 || false === $args[2] ) {
			$uri = $_SERVER['REQUEST_URI'];
		} else {
			$uri = $args[2];
		}
	}

$frag = strstr( $uri, '#' );
	if ( $frag ) {
		$uri = substr( $uri, 0, -strlen( $frag ) );
	} else {
		$frag = '';
	}

if ( 0 === stripos( $uri, 'http://' ) ) {
		$protocol = 'http://';
		$uri      = substr( $uri, 7 );
	} elseif ( 0 === stripos( $uri, 'https://' ) ) {
		$protocol = 'https://';
		$uri      = substr( $uri, 8 );
	} else {
		$protocol = '';
	}

if ( str_contains( $uri, '?' ) ) {
		list( $base, $query ) = explode( '?', $uri, 2 );
		$base                .= '?';
	} elseif ( $protocol || ! str_contains( $uri, '=' ) ) {
		$base  = $uri . '?';
		$query = '';
	} else {
		$base  = '';
		$query = $uri;
	}

wp_parse_str( $query, $qs );
	$qs = urlencode_deep( $qs ); // This re-URL-encodes things that were already in the query string.
	if ( is_array( $args[0] ) ) {
		foreach ( $args[0] as $k => $v ) {
			$qs[ $k ] = $v;
		}
	} else {
		$qs[ $args[0] ] = $args[1];
	}

foreach ( $qs as $k => $v ) {
		if ( false === $v ) {
			unset( $qs[ $k ] );
		}
	}

$ret = build_query( $qs );
	$ret = trim( $ret, '?' );
	$ret = preg_replace( '#=(&|$)#', '$1', $ret );
	$ret = $protocol . $base . $ret . $frag;
	$ret = rtrim( $ret, '?' );
	$ret = str_replace( '?#', '#', $ret );
	return $ret;
}

/**
 * Removes an item or items from a query string.
 *
 * Important: The return value of remove_query_arg() is not escaped by default. Output should be
 * late-escaped with esc_url() or similar to help prevent vulnerability to cross-site scripting
 * (XSS) attacks.
 *
 * @since 1.5.0
 *
 * @param string|string[] $key   Query key or keys to remove.
 * @param false|string    $query Optional. When false uses the current URL. Default false.
 * @return string New URL query string.
 */
function remove_query_arg( $key, $query = false ) {
	if ( is_array( $key ) ) { // Removing multiple keys.
		foreach ( $key as $k ) {
			$query = add_query_arg( $k, false, $query );
		}
		return $query;
	}
	return add_query_arg( $key, false, $query );
}

/**
 * Returns an array of single-use query variable names that can be removed from a URL.
 *
 * @since 4.4.0
 *
 * @return string[] An array of query variable names to remove from the URL.
 */
function wp_removable_query_args() {
	$removable_query_args = array(
		'activate',
		'activated',
		'admin_email_remind_later',
		'approved',
		'core-major-auto-updates-saved',
		'deactivate',
		'delete_count',
		'deleted',
		'disabled',
		'doing_wp_cron',
		'enabled',
		'error',
		'hotkeys_highlight_first',
		'hotkeys_highlight_last',
		'ids',
		'locked',
		'message',
		'same',
		'saved',
		'settings-updated',
		'skipped',
		'spammed',
		'trashed',
		'unspammed',
		'untrashed',
		'update',
		'updated',
		'wp-post-new-reload',
	);

/**
	 * Filters the list of query variable names to remove.
	 *
	 * @since 4.2.0
	 *
	 * @param string[] $removable_query_args An array of query variable names to remove from a URL.
	 */
	return apply_filters( 'removable_query_args', $removable_query_args );
}

/**
 * Walks the array while sanitizing the contents.
 *
 * @since 0.71
 * @since 5.5.0 Non-string values are left untouched.
 *
 * @param array $input_array Array to walk while sanitizing contents.
 * @return array Sanitized $input_array.
 */
function add_magic_quotes( $input_array ) {
	foreach ( (array) $input_array as $k => $v ) {
		if ( is_array( $v ) ) {
			$input_array[ $k ] = add_magic_quotes( $v );
		} elseif ( is_string( $v ) ) {
			$input_array[ $k ] = addslashes( $v );
		}
	}

return $input_array;
}

/**
 * HTTP request for URI to retrieve content.
 *
 * @since 1.5.1
 *
 * @see wp_safe_remote_get()
 *
 * @param string $uri URI/URL of web page to retrieve.
 * @return string|false HTTP content. False on failure.
 */
function wp_remote_fopen( $uri ) {
	$parsed_url = parse_url( $uri );

if ( ! $parsed_url || ! is_array( $parsed_url ) ) {
		return false;
	}

$options            = array();
	$options['timeout'] = 10;

$response = wp_safe_remote_get( $uri, $options );

if ( is_wp_error( $response ) ) {
		return false;
	}

return wp_remote_retrieve_body( $response );
}

/**
 * Sets up the WordPress query.
 *
 * @since 2.0.0
 *
 * @global WP       $wp           Current WordPress environment instance.
 * @global WP_Query $wp_query     WordPress Query object.
 * @global WP_Query $wp_the_query Copy of the WordPress Query object.
 *
 * @param string|array $query_vars Default WP_Query arguments.
 */
function wp( $query_vars = '' ) {
	global $wp, $wp_query, $wp_the_query;

$wp->main( $query_vars );

if ( ! isset( $wp_the_query ) ) {
		$wp_the_query = $wp_query;
	}
}

/**
 * Retrieves the description for the HTTP status.
 *
 * @since 2.3.0
 * @since 3.9.0 Added status codes 418, 428, 429, 431, and 511.
 * @since 4.5.0 Added status codes 308, 421, and 451.
 * @since 5.1.0 Added status code 103.
 *
 * @global array $wp_header_to_desc
 *
 * @param int $code HTTP status code.
 * @return string Status description if found, an empty string otherwise.
 */
function get_status_header_desc( $code ) {
	global $wp_header_to_desc;

$code = absint( $code );

if ( ! isset( $wp_header_to_desc ) ) {
		$wp_header_to_desc = array(
			100 => 'Continue',
			101 => 'Switching Protocols',
			102 => 'Processing',
			103 => 'Early Hints',

200 => 'OK',
			201 => 'Created',
			202 => 'Accepted',
			203 => 'Non-Authoritative Information',
			204 => 'No Content',
			205 => 'Reset Content',
			206 => 'Partial Content',
			207 => 'Multi-Status',
			226 => 'IM Used',

300 => 'Multiple Choices',
			301 => 'Moved Permanently',
			302 => 'Found',
			303 => 'See Other',
			304 => 'Not Modified',
			305 => 'Use Proxy',
			306 => 'Reserved',
			307 => 'Temporary Redirect',
			308 => 'Permanent Redirect',

400 => 'Bad Request',
			401 => 'Unauthorized',
			402 => 'Payment Required',
			403 => 'Forbidden',
			404 => 'Not Found',
			405 => 'Method Not Allowed',
			406 => 'Not Acceptable',
			407 => 'Proxy Authentication Required',
			408 => 'Request Timeout',
			409 => 'Conflict',
			410 => 'Gone',
			411 => 'Length Required',
			412 => 'Precondition Failed',
			413 => 'Request Entity Too Large',
			414 => 'Request-URI Too Long',
			415 => 'Unsupported Media Type',
			416 => 'Requested Range Not Satisfiable',
			417 => 'Expectation Failed',
			418 => 'I\'m a teapot',
			421 => 'Misdirected Request',
			422 => 'Unprocessable Entity',
			423 => 'Locked',
			424 => 'Failed Dependency',
			426 => 'Upgrade Required',
			428 => 'Precondition Required',
			429 => 'Too Many Requests',
			431 => 'Request Header Fields Too Large',
			451 => 'Unavailable For Legal Reasons',

500 => 'Internal Server Error',
			501 => 'Not Implemented',
			502 => 'Bad Gateway',
			503 => 'Service Unavailable',
			504 => 'Gateway Timeout',
			505 => 'HTTP Version Not Supported',
			506 => 'Variant Also Negotiates',
			507 => 'Insufficient Storage',
			510 => 'Not Extended',
			511 => 'Network Authentication Required',
		);
	}

if ( isset( $wp_header_to_desc[ $code ] ) ) {
		return $wp_header_to_desc[ $code ];
	} else {
		return '';
	}
}

/**
 * Sets HTTP status header.
 *
 * @since 2.0.0
 * @since 4.4.0 Added the `$description` parameter.
 *
 * @see get_status_header_desc()
 *
 * @param int    $code        HTTP status code.
 * @param string $description Optional. A custom description for the HTTP status.
 *                            Defaults to the result of get_status_header_desc() for the given code.
 */
function status_header( $code, $description = '' ) {
	if ( ! $description ) {
		$description = get_status_header_desc( $code );
	}

if ( empty( $description ) ) {
		return;
	}

$protocol      = wp_get_server_protocol();
	$status_header = "$protocol $code $description";
	if ( function_exists( 'apply_filters' ) ) {

/**
		 * Filters an HTTP status header.
		 *
		 * @since 2.2.0
		 *
		 * @param string $status_header HTTP status header.
		 * @param int    $code          HTTP status code.
		 * @param string $description   Description for the status code.
		 * @param string $protocol      Server protocol.
		 */
		$status_header = apply_filters( 'status_header', $status_header, $code, $description, $protocol );
	}

if ( ! headers_sent() ) {
		header( $status_header, true, $code );
	}
}

/**
 * Gets the HTTP header information to prevent caching.
 *
 * The several different headers cover the different ways cache prevention
 * is handled by different browsers.
 *
 * @since 2.8.0
 * @since 6.3.0 The `Cache-Control` header for logged in users now includes the
 *              `no-store` and `private` directives.
 *
 * @return array The associative array of header names and field values.
 */
function wp_get_nocache_headers() {
	$cache_control = ( function_exists( 'is_user_logged_in' ) && is_user_logged_in() )
		? 'no-cache, must-revalidate, max-age=0, no-store, private'
		: 'no-cache, must-revalidate, max-age=0';

$headers = array(
		'Expires'       => 'Wed, 11 Jan 1984 05:00:00 GMT',
		'Cache-Control' => $cache_control,
	);

if ( function_exists( 'apply_filters' ) ) {
		/**
		 * Filters the cache-controlling HTTP headers that are used to prevent caching.
		 *
		 * @since 2.8.0
		 *
		 * @see wp_get_nocache_headers()
		 *
		 * @param array $headers Header names and field values.
		 */
		$headers = (array) apply_filters( 'nocache_headers', $headers );
	}
	$headers['Last-Modified'] = false;
	return $headers;
}

/**
 * Sets the HTTP headers to prevent caching for the different browsers.
 *
 * Different browsers support different nocache headers, so several
 * headers must be sent so that all of them get the point that no
 * caching should occur.
 *
 * @since 2.0.0
 *
 * @see wp_get_nocache_headers()
 */
function nocache_headers() {
	if ( headers_sent() ) {
		return;
	}

$headers = wp_get_nocache_headers();

unset( $headers['Last-Modified'] );

header_remove( 'Last-Modified' );

foreach ( $headers as $name => $field_value ) {
		header( "{$name}: {$field_value}" );
	}
}

/**
 * Sets the HTTP headers for caching for 10 days with JavaScript content type.
 *
 * @since 2.1.0
 */
function cache_javascript_headers() {
	$expires_offset = 10 * DAY_IN_SECONDS;

header( 'Content-Type: text/javascript; charset=' . get_bloginfo( 'charset' ) );
	header( 'Vary: Accept-Encoding' ); // Handle proxies.
	header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', time() + $expires_offset ) . ' GMT' );
}

/**
 * Retrieves the number of database queries during the WordPress execution.
 *
 * @since 2.0.0
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @return int Number of database queries.
 */
function get_num_queries() {
	global $wpdb;
	return $wpdb->num_queries;
}

/**
 * Determines whether input is yes or no.
 *
 * Must be 'y' to be true.
 *
 * @since 1.0.0
 *
 * @param string $yn Character string containing either 'y' (yes) or 'n' (no).
 * @return bool True if 'y', false on anything else.
 */
function bool_from_yn( $yn ) {
	return ( 'y' === strtolower( $yn ) );
}

/**
 * Loads the feed template from the use of an action hook.
 *
 * If the feed action does not have a hook, then the function will die with a
 * message telling the visitor that the feed is not valid.
 *
 * It is better to only have one hook for each feed.
 *
 * @since 2.1.0
 *
 * @global WP_Query $wp_query WordPress Query object.
 */
function do_feed() {
	global $wp_query;

$feed = get_query_var( 'feed' );

// Remove the pad, if present.
	$feed = preg_replace( '/^_+/', '', $feed );

if ( '' === $feed || 'feed' === $feed ) {
		$feed = get_default_feed();
	}

if ( ! has_action( "do_feed_{$feed}" ) ) {
		wp_die( __( 'Error: This is not a valid feed template.' ), '', array( 'response' => 404 ) );
	}

/**
	 * Fires once the given feed is loaded.
	 *
	 * The dynamic portion of the hook name, `$feed`, refers to the feed template name.
	 *
	 * Possible hook names include:
	 *
	 *  - `do_feed_atom`
	 *  - `do_feed_rdf`
	 *  - `do_feed_rss`
	 *  - `do_feed_rss2`
	 *
	 * @since 2.1.0
	 * @since 4.4.0 The `$feed` parameter was added.
	 *
	 * @param bool   $is_comment_feed Whether the feed is a comment feed.
	 * @param string $feed            The feed name.
	 */
	do_action( "do_feed_{$feed}", $wp_query->is_comment_feed, $feed );
}

/**
 * Loads the RDF RSS 0.91 Feed template.
 *
 * @since 2.1.0
 *
 * @see load_template()
 */
function do_feed_rdf() {
	load_template( ABSPATH . WPINC . '/feed-rdf.php' );
}

/**
 * Loads the RSS 1.0 Feed Template.
 *
 * @since 2.1.0
 *
 * @see load_template()
 */
function do_feed_rss() {
	load_template( ABSPATH . WPINC . '/feed-rss.php' );
}

/**
 * Loads either the RSS2 comment feed or the RSS2 posts feed.
 *
 * @since 2.1.0
 *
 * @see load_template()
 *
 * @param bool $for_comments True for the comment feed, false for normal feed.
 */
function do_feed_rss2( $for_comments ) {
	if ( $for_comments ) {
		load_template( ABSPATH . WPINC . '/feed-rss2-comments.php' );
	} else {
		load_template( ABSPATH . WPINC . '/feed-rss2.php' );
	}
}

/**
 * Loads either Atom comment feed or Atom posts feed.
 *
 * @since 2.1.0
 *
 * @see load_template()
 *
 * @param bool $for_comments True for the comment feed, false for normal feed.
 */
function do_feed_atom( $for_comments ) {
	if ( $for_comments ) {
		load_template( ABSPATH . WPINC . '/feed-atom-comments.php' );
	} else {
		load_template( ABSPATH . WPINC . '/feed-atom.php' );
	}
}

/**
 * Displays the default robots.txt file content.
 *
 * @since 2.1.0
 * @since 5.3.0 Remove the "Disallow: /" output if search engine visibility is
 *              discouraged in favor of robots meta HTML tag via wp_robots_no_robots()
 *              filter callback.
 */
function do_robots() {
	header( 'Content-Type: text/plain; charset=utf-8' );

/**
	 * Fires when displaying the robots.txt file.
	 *
	 * @since 2.1.0
	 */
	do_action( 'do_robotstxt' );

$output = "User-agent: *\n";
	$public = get_option( 'blog_public' );

$site_url = parse_url( site_url() );
	$path     = ( ! empty( $site_url['path'] ) ) ? $site_url['path'] : '';
	$output  .= "Disallow: $path/wp-admin/\n";
	$output  .= "Allow: $path/wp-admin/admin-ajax.php\n";

/**
	 * Filters the robots.txt output.
	 *
	 * @since 3.0.0
	 *
	 * @param string $output The robots.txt output.
	 * @param bool   $public Whether the site is considered "public".
	 */
	echo apply_filters( 'robots_txt', $output, $public );
}

/**
 * Displays the favicon.ico file content.
 *
 * @since 5.4.0
 */
function do_favicon() {
	/**
	 * Fires when serving the favicon.ico file.
	 *
	 * @since 5.4.0
	 */
	do_action( 'do_faviconico' );

wp_redirect( get_site_icon_url( 32, includes_url( 'images/w-logo-blue-white-bg.png' ) ) );
	exit;
}

/**
 * Determines whether WordPress is already installed.
 *
 * The cache will be checked first. If you have a cache plugin, which saves
 * the cache values, then this will work. If you use the default WordPress
 * cache, and the database goes away, then you might have problems.
 *
 * Checks for the 'siteurl' option for whether WordPress is installed.
 *
 * For more information on this and similar theme functions, check out
 * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
 * Conditional Tags} article in the Theme Developer Handbook.
 *
 * @since 2.1.0
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @return bool Whether the site is already installed.
 */
function is_blog_installed() {
	global $wpdb;

/*
	 * Check cache first. If options table goes away and we have true
	 * cached, oh well.
	 */
	if ( wp_cache_get( 'is_blog_installed' ) ) {
		return true;
	}

$suppress = $wpdb->suppress_errors();

if ( ! wp_installing() ) {
		$alloptions = wp_load_alloptions();
	}

// If siteurl is not set to autoload, check it specifically.
	if ( ! isset( $alloptions['siteurl'] ) ) {
		$installed = $wpdb->get_var( "SELECT option_value FROM $wpdb->options WHERE option_name = 'siteurl'" );
	} else {
		$installed = $alloptions['siteurl'];
	}

$wpdb->suppress_errors( $suppress );

$installed = ! empty( $installed );
	wp_cache_set( 'is_blog_installed', $installed );

if ( $installed ) {
		return true;
	}

// If visiting repair.php, return true and let it take over.
	if ( defined( 'WP_REPAIRING' ) ) {
		return true;
	}

$suppress = $wpdb->suppress_errors();

/*
	 * Loop over the WP tables. If none exist, then scratch installation is allowed.
	 * If one or more exist, suggest table repair since we got here because the
	 * options table could not be accessed.
	 */
	$wp_tables = $wpdb->tables();
	foreach ( $wp_tables as $table ) {
		// The existence of custom user tables shouldn't suggest an unwise state or prevent a clean installation.
		if ( defined( 'CUSTOM_USER_TABLE' ) && CUSTOM_USER_TABLE === $table ) {
			continue;
		}

if ( defined( 'CUSTOM_USER_META_TABLE' ) && CUSTOM_USER_META_TABLE === $table ) {
			continue;
		}

$described_table = $wpdb->get_results( "DESCRIBE $table;" );
		if (
			( ! $described_table && empty( $wpdb->last_error ) ) ||
			( is_array( $described_table ) && 0 === count( $described_table ) )
		) {
			continue;
		}

// One or more tables exist. This is not good.

wp_load_translations_early();

// Die with a DB error.
		$wpdb->error = sprintf(
			/* translators: %s: Database repair URL. */
			__( 'One or more database tables are unavailable. The database may need to be <a href="%s">repaired</a>.' ),
			'maint/repair.php?referrer=is_blog_installed'
		);

dead_db();
	}

$wpdb->suppress_errors( $suppress );

wp_cache_set( 'is_blog_installed', false );

return false;
}

/**
 * Retrieves URL with nonce added to URL query.
 *
 * @since 2.0.4
 *
 * @param string     $actionurl URL to add nonce action.
 * @param int|string $action    Optional. Nonce action name. Default -1.
 * @param string     $name      Optional. Nonce name. Default '_wpnonce'.
 * @return string Escaped URL with nonce action added.
 */
function wp_nonce_url( $actionurl, $action = -1, $name = '_wpnonce' ) {
	$actionurl = str_replace( '&', '&', $actionurl );
	return esc_html( add_query_arg( $name, wp_create_nonce( $action ), $actionurl ) );
}

/**
 * Retrieves or display nonce hidden field for forms.
 *
 * The nonce field is used to validate that the contents of the form came from
 * the location on the current site and not somewhere else. The nonce does not
 * offer absolute protection, but should protect against most cases. It is very
 * important to use nonce field in forms.
 *
 * The $action and $name are optional, but if you want to have better security,
 * it is strongly suggested to set those two parameters. It is easier to just
 * call the function without any parameters, because validation of the nonce
 * doesn't require any parameters, but since crackers know what the default is
 * it won't be difficult for them to find a way around your nonce and cause
 * damage.
 *
 * The input name will be whatever $name value you gave. The input value will be
 * the nonce creation value.
 *
 * @since 2.0.4
 *
 * @param int|string $action Optional. Action name. Default -1.
 * @param string $name Optional. Nonce name. Default '_wpnonce'.
 * @param bool $referer Optional. Whether to set the referer field for validation. Default true.
 * @param bool $display Optional. Whether to display or return hidden form field. Default true.
 * @return string Nonce field HTML markup.
 */
function wp_nonce_field( $action = -1, $name = '_wpnonce', $referer = true, $display = true ) {
	$name = esc_attr( $name );
	$nonce_field = '<input type="hidden" id="' . $name . '" name="' . $name . '" value="' . wp_create_nonce( $action ) . '" />';

if ( $referer ) {
		$nonce_field .= wp_referer_field( false );
	}

if ( $display ) {
		echo $nonce_field;
	}

return $nonce_field;
}

/**
 * Retrieves or displays referer hidden field for forms.
 *
 * The referer link is the current Request URI from the server super global. The
 * input name is '_wp_http_referer', in case you wanted to check manually.
 *
 * @since 2.0.4
 *
 * @param bool $display Optional. Whether to echo or return the referer field. Default true.
 * @return string Referer field HTML markup.
 */
function wp_referer_field( $display = true ) {
	$request_url = remove_query_arg( '_wp_http_referer' );
	$referer_field = '<input type="hidden" name="_wp_http_referer" value="' . esc_url( $request_url ) . '" />';

if ( $display ) {
		echo $referer_field;
	}

return $referer_field;
}

/**
 * Retrieves or displays original referer hidden field for forms.
 *
 * The input name is '_wp_original_http_referer' and will be either the same
 * value of wp_referer_field(), if that was posted already or it will be the
 * current page, if it doesn't exist.
 *
 * @since 2.0.4
 *
 * @param bool   $display      Optional. Whether to echo the original http referer. Default true.
 * @param string $jump_back_to Optional. Can be 'previous' or page you want to jump back to.
 *                             Default 'current'.
 * @return string Original referer field.
 */
function wp_original_referer_field( $display = true, $jump_back_to = 'current' ) {
	$ref = wp_get_original_referer();

if ( ! $ref ) {
		$ref = ( 'previous' === $jump_back_to ) ? wp_get_referer() : wp_unslash( $_SERVER['REQUEST_URI'] );
	}

$orig_referer_field = '<input type="hidden" name="_wp_original_http_referer" value="' . esc_attr( $ref ) . '" />';

if ( $display ) {
		echo $orig_referer_field;
	}

return $orig_referer_field;
}

/**
 * Retrieves referer from '_wp_http_referer' or HTTP referer.
 *
 * If it's the same as the current request URL, will return false.
 *
 * @since 2.0.4
 *
 * @return string|false Referer URL on success, false on failure.
 */
function wp_get_referer() {
	// Return early if called before wp_validate_redirect() is defined.
	if ( ! function_exists( 'wp_validate_redirect' ) ) {
		return false;
	}

$ref = wp_get_raw_referer();

if ( $ref && wp_unslash( $_SERVER['REQUEST_URI'] ) !== $ref
		&& home_url() . wp_unslash( $_SERVER['REQUEST_URI'] ) !== $ref
	) {
		return wp_validate_redirect( $ref, false );
	}

return false;
}

/**
 * Retrieves unvalidated referer from the '_wp_http_referer' URL query variable or the HTTP referer.
 *
 * If the value of the '_wp_http_referer' URL query variable is not a string then it will be ignored.
 *
 * Do not use for redirects, use wp_get_referer() instead.
 *
 * @since 4.5.0
 *
 * @return string|false Referer URL on success, false on failure.
 */
function wp_get_raw_referer() {
	if ( ! empty( $_REQUEST['_wp_http_referer'] ) && is_string( $_REQUEST['_wp_http_referer'] ) ) {
		return wp_unslash( $_REQUEST['_wp_http_referer'] );
	} elseif ( ! empty( $_SERVER['HTTP_REFERER'] ) ) {
		return wp_unslash( $_SERVER['HTTP_REFERER'] );
	}

return false;
}

/**
 * Retrieves original referer that was posted, if it exists.
 *
 * @since 2.0.4
 *
 * @return string|false Original referer URL on success, false on failure.
 */
function wp_get_original_referer() {
	// Return early if called before wp_validate_redirect() is defined.
	if ( ! function_exists( 'wp_validate_redirect' ) ) {
		return false;
	}

if ( ! empty( $_REQUEST['_wp_original_http_referer'] ) ) {
		return wp_validate_redirect( wp_unslash( $_REQUEST['_wp_original_http_referer'] ), false );
	}

return false;
}

/**
 * Recursive directory creation based on full path.
 *
 * Will attempt to set permissions on folders.
 *
 * @since 2.0.1
 *
 * @param string $target Full path to attempt to create.
 * @return bool Whether the path was created. True if path already exists.
 */
function wp_mkdir_p( $target ) {
	$wrapper = null;

// Strip the protocol.
	if ( wp_is_stream( $target ) ) {
		list( $wrapper, $target ) = explode( '://', $target, 2 );
	}

// From php.net/mkdir user contributed notes.
	$target = str_replace( '//', '/', $target );

// Put the wrapper back on the target.
	if ( null !== $wrapper ) {
		$target = $wrapper . '://' . $target;
	}

/*
	 * Safe mode fails with a trailing slash under certain PHP versions.
	 * Use rtrim() instead of untrailingslashit to avoid formatting.php dependency.
	 */
	$target = rtrim( $target, '/' );
	if ( empty( $target ) ) {
		$target = '/';
	}

if ( file_exists( $target ) ) {
		return @is_dir( $target );
	}

// Do not allow path traversals.
	if ( str_contains( $target, '../' ) || str_contains( $target, '..' . DIRECTORY_SEPARATOR ) ) {
		return false;
	}

// We need to find the permissions of the parent folder that exists and inherit that.
	$target_parent = dirname( $target );
	while ( '.' !== $target_parent && ! is_dir( $target_parent ) && dirname( $target_parent ) !== $target_parent ) {
		$target_parent = dirname( $target_parent );
	}

// Get the permission bits.
	$stat = @stat( $target_parent );
	if ( $stat ) {
		$dir_perms = $stat['mode'] & 0007777;
	} else {
		$dir_perms = 0777;
	}

if ( @mkdir( $target, $dir_perms, true ) ) {

/*
		 * If a umask is set that modifies $dir_perms, we'll have to re-set
		 * the $dir_perms correctly with chmod()
		 */
		if ( ( $dir_perms & ~umask() ) !== $dir_perms ) {
			$folder_parts = explode( '/', substr( $target, strlen( $target_parent ) + 1 ) );
			for ( $i = 1, $c = count( $folder_parts ); $i <= $c; $i++ ) {
				chmod( $target_parent . '/' . implode( '/', array_slice( $folder_parts, 0, $i ) ), $dir_perms );
			}
		}

return true;
	}

return false;
}

/**
 * Tests if a given filesystem path is absolute.
 *
 * For example, '/foo/bar', or 'c:\windows'.
 *
 * @since 2.5.0
 *
 * @param string $path File path.
 * @return bool True if path is absolute, false is not absolute.
 */
function path_is_absolute( $path ) {
	/*
	 * Check to see if the path is a stream and check to see if its an actual
	 * path or file as realpath() does not support stream wrappers.
	 */
	if ( wp_is_stream( $path ) && ( is_dir( $path ) || is_file( $path ) ) ) {
		return true;
	}

/*
	 * This is definitive if true but fails if $path does not exist or contains
	 * a symbolic link.
	 */
	if ( realpath( $path ) === $path ) {
		return true;
	}

if ( strlen( $path ) === 0 || '.' === $path[0] ) {
		return false;
	}

// Windows allows absolute paths like this.
	if ( preg_match( '#^[a-zA-Z]:\\\\#', $path ) ) {
		return true;
	}

// A path starting with / or \ is absolute; anything else is relative.
	return ( '/' === $path[0] || '\\' === $path[0] );
}

/**
 * Joins two filesystem paths together.
 *
 * For example, 'give me $path relative to $base'. If the $path is absolute,
 * then it the full path is returned.
 *
 * @since 2.5.0
 *
 * @param string $base Base path.
 * @param string $path Path relative to $base.
 * @return string The path with the base or absolute path.
 */
function path_join( $base, $path ) {
	if ( path_is_absolute( $path ) ) {
		return $path;
	}

return rtrim( $base, '/' ) . '/' . $path;
}

/**
 * Normalizes a filesystem path.
 *
 * On windows systems, replaces backslashes with forward slashes
 * and forces upper-case drive letters.
 * Allows for two leading slashes for Windows network shares, but
 * ensures that all other duplicate slashes are reduced to a single.
 *
 * @since 3.9.0
 * @since 4.4.0 Ensures upper-case drive letters on Windows systems.
 * @since 4.5.0 Allows for Windows network shares.
 * @since 4.9.7 Allows for PHP file wrappers.
 *
 * @param string $path Path to normalize.
 * @return string Normalized path.
 */
function wp_normalize_path( $path ) {
	$wrapper = '';

if ( wp_is_stream( $path ) ) {
		list( $wrapper, $path ) = explode( '://', $path, 2 );

$wrapper .= '://';
	}

// Standardize all paths to use '/'.
	$path = str_replace( '\\', '/', $path );

// Replace multiple slashes down to a singular, allowing for network shares having two slashes.
	$path = preg_replace( '|(?<=.)/+|', '/', $path );

// Windows paths should uppercase the drive letter.
	if ( ':' === substr( $path, 1, 1 ) ) {
		$path = ucfirst( $path );
	}

return $wrapper . $path;
}

/**
 * Determines a writable directory for temporary files.
 *
 * Function's preference is the return value of sys_get_temp_dir(),
 * followed by your PHP temporary upload directory, followed by WP_CONTENT_DIR,
 * before finally defaulting to /tmp/
 *
 * In the event that this function does not find a writable location,
 * It may be overridden by the WP_TEMP_DIR constant in your wp-config.php file.
 *
 * @since 2.5.0
 *
 * @return string Writable temporary directory.
 */
function get_temp_dir() {
	static $temp = '';
	if ( defined( 'WP_TEMP_DIR' ) ) {
		return trailingslashit( WP_TEMP_DIR );
	}

if ( $temp ) {
		return trailingslashit( $temp );
	}

if ( function_exists( 'sys_get_temp_dir' ) ) {
		$temp = sys_get_temp_dir();
		if ( @is_dir( $temp ) && wp_is_writable( $temp ) ) {
			return trailingslashit( $temp );
		}
	}

$temp = ini_get( 'upload_tmp_dir' );
	if ( @is_dir( $temp ) && wp_is_writable( $temp ) ) {
		return trailingslashit( $temp );
	}

$temp = WP_CONTENT_DIR . '/';
	if ( is_dir( $temp ) && wp_is_writable( $temp ) ) {
		return $temp;
	}

return '/tmp/';
}

/**
 * Determines if a directory is writable.
 *
 * This function is used to work around certain ACL issues in PHP primarily
 * affecting Windows Servers.
 *
 * @since 3.6.0
 *
 * @see win_is_writable()
 *
 * @param string $path Path to check for write-ability.
 * @return bool Whether the path is writable.
 */
function wp_is_writable( $path ) {
	if ( 'WIN' === strtoupper( substr( PHP_OS, 0, 3 ) ) ) {
		return win_is_writable( $path );
	} else {
		return @is_writable( $path );
	}
}

/**
 * Workaround for Windows bug in is_writable() function
 *
 * PHP has issues with Windows ACL's for determine if a
 * directory is writable or not, this works around them by
 * checking the ability to open files rather than relying
 * upon PHP to interprate the OS ACL.
 *
 * @since 2.8.0
 *
 * @see https://bugs.php.net/bug.php?id=27609
 * @see https://bugs.php.net/bug.php?id=30931
 *
 * @param string $path Windows path to check for write-ability.
 * @return bool Whether the path is writable.
 */
function win_is_writable( $path ) {
	if ( '/' === $path[ strlen( $path ) - 1 ] ) {
		// If it looks like a directory, check a random file within the directory.
		return win_is_writable( $path . uniqid( mt_rand() ) . '.tmp' );
	} elseif ( is_dir( $path ) ) {
		// If it's a directory (and not a file), check a random file within the directory.
		return win_is_writable( $path . '/' . uniqid( mt_rand() ) . '.tmp' );
	}

// Check tmp file for read/write capabilities.
	$should_delete_tmp_file = ! file_exists( $path );

$f = @fopen( $path, 'a' );
	if ( false === $f ) {
		return false;
	}
	fclose( $f );

if ( $should_delete_tmp_file ) {
		unlink( $path );
	}

return true;
}

/**
 * Retrieves uploads directory information.
 *
 * Same as wp_upload_dir() but "light weight" as it doesn't attempt to create the uploads directory.
 * Intended for use in themes, when only 'basedir' and 'baseurl' are needed, generally in all cases
 * when not uploading files.
 *
 * @since 4.5.0
 *
 * @see wp_upload_dir()
 *
 * @return array See wp_upload_dir() for description.
 */
function wp_get_upload_dir() {
	return wp_upload_dir( null, false );
}

/**
 * Returns an array containing the current upload directory's path and URL.
 *
 * Checks the 'upload_path' option, which should be from the web root folder,
 * and if it isn't empty it will be used. If it is empty, then the path will be
 * 'WP_CONTENT_DIR/uploads'. If the 'UPLOADS' constant is defined, then it will
 * override the 'upload_path' option and 'WP_CONTENT_DIR/uploads' path.
 *
 * The upload URL path is set either by the 'upload_url_path' option or by using
 * the 'WP_CONTENT_URL' constant and appending '/uploads' to the path.
 *
 * If the 'uploads_use_yearmonth_folders' is set to true (checkbox if checked in
 * the administration settings panel), then the time will be used. The format
 * will be year first and then month.
 *
 * If the path couldn't be created, then an error will be returned with the key
 * 'error' containing the error message. The error suggests that the parent
 * directory is not writable by the server.
 *
 * @since 2.0.0
 * @uses _wp_upload_dir()
 *
 * @param string $time Optional. Time formatted in 'yyyy/mm'. Default null.
 * @param bool   $create_dir Optional. Whether to check and create the uploads directory.
 *                           Default true for backward compatibility.
 * @param bool   $refresh_cache Optional. Whether to refresh the cache. Default false.
 * @return array {
 *     Array of information about the upload directory.
 *
 *     @type string       $path    Base directory and subdirectory or full path to upload directory.
 *     @type string       $url     Base URL and subdirectory or absolute URL to upload directory.
 *     @type string       $subdir  Subdirectory if uploads use year/month folders option is on.
 *     @type string       $basedir Path without subdir.
 *     @type string       $baseurl URL path without subdir.
 *     @type string|false $error   False or error message.
 * }
 */
function wp_upload_dir( $time = null, $create_dir = true, $refresh_cache = false ) {
	static $cache = array(), $tested_paths = array();

$key = sprintf( '%d-%s', get_current_blog_id(), (string) $time );

if ( $refresh_cache || empty( $cache[ $key ] ) ) {
		$cache[ $key ] = _wp_upload_dir( $time );
	}

/**
	 * Filters the uploads directory data.
	 *
	 * @since 2.0.0
	 *
	 * @param array $uploads {
	 *     Array of information about the upload directory.
	 *
	 *     @type string       $path    Base directory and subdirectory or full path to upload directory.
	 *     @type string       $url     Base URL and subdirectory or absolute URL to upload directory.
	 *     @type string       $subdir  Subdirectory if uploads use year/month folders option is on.
	 *     @type string       $basedir Path without subdir.
	 *     @type string       $baseurl URL path without subdir.
	 *     @type string|false $error   False or error message.
	 * }
	 */
	$uploads = apply_filters( 'upload_dir', $cache[ $key ] );

if ( $create_dir ) {
		$path = $uploads['path'];

if ( array_key_exists( $path, $tested_paths ) ) {
			$uploads['error'] = $tested_paths[ $path ];
		} else {
			if ( ! wp_mkdir_p( $path ) ) {
				if ( str_starts_with( $uploads['basedir'], ABSPATH ) ) {
					$error_path = str_replace( ABSPATH, '', $uploads['basedir'] ) . $uploads['subdir'];
				} else {
					$error_path = wp_basename( $uploads['basedir'] ) . $uploads['subdir'];
				}

$uploads['error'] = sprintf(
					/* translators: %s: Directory path. */
					__( 'Unable to create directory %s. Is its parent directory writable by the server?' ),
					esc_html( $error_path )
				);
			}

$tested_paths[ $path ] = $uploads['error'];
		}
	}

return $uploads;
}

/**
 * A non-filtered, non-cached version of wp_upload_dir() that doesn't check the path.
 *
 * @since 4.5.0
 * @access private
 *
 * @param string $time Optional. Time formatted in 'yyyy/mm'. Default null.
 * @return array See wp_upload_dir()
 */
function _wp_upload_dir( $time = null ) {
	$siteurl     = get_option( 'siteurl' );
	$upload_path = trim( get_option( 'upload_path' ) );

if ( empty( $upload_path ) || 'wp-content/uploads' === $upload_path ) {
		$dir = WP_CONTENT_DIR . '/uploads';
	} elseif ( ! str_starts_with( $upload_path, ABSPATH ) ) {
		// $dir is absolute, $upload_path is (maybe) relative to ABSPATH.
		$dir = path_join( ABSPATH, $upload_path );
	} else {
		$dir = $upload_path;
	}

$url = get_option( 'upload_url_path' );
	if ( ! $url ) {
		if ( empty( $upload_path ) || ( 'wp-content/uploads' === $upload_path ) || ( $upload_path === $dir ) ) {
			$url = WP_CONTENT_URL . '/uploads';
		} else {
			$url = trailingslashit( $siteurl ) . $upload_path;
		}
	}

/*
	 * Honor the value of UPLOADS. This happens as long as ms-files rewriting is disabled.
	 * We also sometimes obey UPLOADS when rewriting is enabled -- see the next block.
	 */
	if ( defined( 'UPLOADS' ) && ! ( is_multisite() && get_site_option( 'ms_files_rewriting' ) ) ) {
		$dir = ABSPATH . UPLOADS;
		$url = trailingslashit( $siteurl ) . UPLOADS;
	}

// If multisite (and if not the main site in a post-MU network).
	if ( is_multisite() && ! ( is_main_network() && is_main_site() && defined( 'MULTISITE' ) ) ) {

if ( ! get_site_option( 'ms_files_rewriting' ) ) {
			/*
			 * If ms-files rewriting is disabled (networks created post-3.5), it is fairly
			 * straightforward: Append sites/%d if we're not on the main site (for post-MU
			 * networks). (The extra directory prevents a four-digit ID from conflicting with
			 * a year-based directory for the main site. But if a MU-era network has disabled
			 * ms-files rewriting manually, they don't need the extra directory, as they never
			 * had wp-content/uploads for the main site.)
			 */

if ( defined( 'MULTISITE' ) ) {
				$ms_dir = '/sites/' . get_current_blog_id();
			} else {
				$ms_dir = '/' . get_current_blog_id();
			}

$dir .= $ms_dir;
			$url .= $ms_dir;

} elseif ( defined( 'UPLOADS' ) && ! ms_is_switched() ) {
			/*
			 * Handle the old-form ms-files.php rewriting if the network still has that enabled.
			 * When ms-files rewriting is enabled, then we only listen to UPLOADS when:
			 * 1) We are not on the main site in a post-MU network, as wp-content/uploads is used
			 *    there, and
			 * 2) We are not switched, as ms_upload_constants() hardcodes these constants to reflect
			 *    the original blog ID.
			 *
			 * Rather than UPLOADS, we actually use BLOGUPLOADDIR if it is set, as it is absolute.
			 * (And it will be set, see ms_upload_constants().) Otherwise, UPLOADS can be used, as
			 * as it is relative to ABSPATH. For the final piece: when UPLOADS is used with ms-files
			 * rewriting in multisite, the resulting URL is /files. (#WP22702 for background.)
			 */

if ( defined( 'BLOGUPLOADDIR' ) ) {
				$dir = untrailingslashit( BLOGUPLOADDIR );
			} else {
				$dir = ABSPATH . UPLOADS;
			}
			$url = trailingslashit( $siteurl ) . 'files';
		}
	}

$basedir = $dir;
	$baseurl = $url;

$subdir = '';
	if ( get_option( 'uploads_use_yearmonth_folders' ) ) {
		// Generate the yearly and monthly directories.
		if ( ! $time ) {
			$time = current_time( 'mysql' );
		}
		$y      = substr( $time, 0, 4 );
		$m      = substr( $time, 5, 2 );
		$subdir = "/$y/$m";
	}

$dir .= $subdir;
	$url .= $subdir;

return array(
		'path'    => $dir,
		'url'     => $url,
		'subdir'  => $subdir,
		'basedir' => $basedir,
		'baseurl' => $baseurl,
		'error'   => false,
	);
}

/**
 * Gets a filename that is sanitized and unique for the given directory.
 *
 * If the filename is not unique, then a number will be added to the filename
 * before the extension, and will continue adding numbers until the filename
 * is unique.
 *
 * The callback function allows the caller to use their own method to create
 * unique file names. If defined, the callback should take three arguments:
 * - directory, base filename, and extension - and return a unique filename.
 *
 * @since 2.5.0
 *
 * @param string   $dir                      Directory.
 * @param string   $filename                 File name.
 * @param callable $unique_filename_callback Callback. Default null.
 * @return string New filename, if given wasn't unique.
 */
function wp_unique_filename( $dir, $filename, $unique_filename_callback = null ) {
	// Sanitize the file name before we begin processing.
	$filename = sanitize_file_name( $filename );
	$ext2     = null;

// Initialize vars used in the wp_unique_filename filter.
	$number        = '';
	$alt_filenames = array();

// Separate the filename into a name and extension.
	$ext  = pathinfo( $filename, PATHINFO_EXTENSION );
	$name = pathinfo( $filename, PATHINFO_BASENAME );

if ( $ext ) {
		$ext = '.' . $ext;
	}

// Edge case: if file is named '.ext', treat as an empty name.
	if ( $name === $ext ) {
		$name = '';
	}

/*
	 * Increment the file number until we have a unique file to save in $dir.
	 * Use callback if supplied.
	 */
	if ( $unique_filename_callback && is_callable( $unique_filename_callback ) ) {
		$filename = call_user_func( $unique_filename_callback, $dir, $name, $ext );
	} else {
		$fname = pathinfo( $filename, PATHINFO_FILENAME );

// Always append a number to file names that can potentially match image sub-size file names.
		if ( $fname && preg_match( '/-(?:\d+x\d+|scaled|rotated)$/', $fname ) ) {
			$number = 1;

// At this point the file name may not be unique. This is tested below and the $number is incremented.
			$filename = str_replace( "{$fname}{$ext}", "{$fname}-{$number}{$ext}", $filename );
		}

/*
		 * Get the mime type. Uploaded files were already checked with wp_check_filetype_and_ext()
		 * in _wp_handle_upload(). Using wp_check_filetype() would be sufficient here.
		 */
		$file_type = wp_check_filetype( $filename );
		$mime_type = $file_type['type'];

$is_image    = ( ! empty( $mime_type ) && str_starts_with( $mime_type, 'image/' ) );
		$upload_dir  = wp_get_upload_dir();
		$lc_filename = null;

$lc_ext = strtolower( $ext );
		$_dir   = trailingslashit( $dir );

/*
		 * If the extension is uppercase add an alternate file name with lowercase extension.
		 * Both need to be tested for uniqueness as the extension will be changed to lowercase
		 * for better compatibility with different filesystems. Fixes an inconsistency in WP < 2.9
		 * where uppercase extensions were allowed but image sub-sizes were created with
		 * lowercase extensions.
		 */
		if ( $ext && $lc_ext !== $ext ) {
			$lc_filename = preg_replace( '|' . preg_quote( $ext ) . '$|', $lc_ext, $filename );
		}

/*
		 * Increment the number added to the file name if there are any files in $dir
		 * whose names match one of the possible name variations.
		 */
		while ( file_exists( $_dir . $filename ) || ( $lc_filename && file_exists( $_dir . $lc_filename ) ) ) {
			$new_number = (int) $number + 1;

if ( $lc_filename ) {
				$lc_filename = str_replace(
					array( "-{$number}{$lc_ext}", "{$number}{$lc_ext}" ),
					"-{$new_number}{$lc_ext}",
					$lc_filename
				);
			}

if ( '' === "{$number}{$ext}" ) {
				$filename = "{$filename}-{$new_number}";
			} else {
				$filename = str_replace(
					array( "-{$number}{$ext}", "{$number}{$ext}" ),
					"-{$new_number}{$ext}",
					$filename
				);
			}

$number = $new_number;
		}

// Change the extension to lowercase if needed.
		if ( $lc_filename ) {
			$filename = $lc_filename;
		}

/*
		 * Prevent collisions with existing file names that contain dimension-like strings
		 * (whether they are subsizes or originals uploaded prior to #42437).
		 */

$files = array();
		$count = 10000;

// The (resized) image files would have name and extension, and will be in the uploads dir.
		if ( $name && $ext && @is_dir( $dir ) && str_contains( $dir, $upload_dir['basedir'] ) ) {
			/**
			 * Filters the file list used for calculating a unique filename for a newly added file.
			 *
			 * Returning an array from the filter will effectively short-circuit retrieval
			 * from the filesystem and return the passed value instead.
			 *
			 * @since 5.5.0
			 *
			 * @param array|null $files    The list of files to use for filename comparisons.
			 *                             Default null (to retrieve the list from the filesystem).
			 * @param string     $dir      The directory for the new file.
			 * @param string     $filename The proposed filename for the new file.
			 */
			$files = apply_filters( 'pre_wp_unique_filename_file_list', null, $dir, $filename );

if ( null === $files ) {
				// List of all files and directories contained in $dir.
				$files = @scandir( $dir );
			}

if ( ! empty( $files ) ) {
				// Remove "dot" dirs.
				$files = array_diff( $files, array( '.', '..' ) );
			}

if ( ! empty( $files ) ) {
				$count = count( $files );

/*
				 * Ensure this never goes into infinite loop as it uses pathinfo() and regex in the check,
				 * but string replacement for the changes.
				 */
				$i = 0;

while ( $i <= $count && _wp_check_existing_file_names( $filename, $files ) ) {
					$new_number = (int) $number + 1;

// If $ext is uppercase it was replaced with the lowercase version after the previous loop.
					$filename = str_replace(
						array( "-{$number}{$lc_ext}", "{$number}{$lc_ext}" ),
						"-{$new_number}{$lc_ext}",
						$filename
					);

$number = $new_number;
					++$i;
				}
			}
		}

/*
		 * Check if an image will be converted after uploading or some existing image sub-size file names may conflict
		 * when regenerated. If yes, ensure the new file name will be unique and will produce unique sub-sizes.
		 */
		if ( $is_image ) {
			/** This filter is documented in wp-includes/class-wp-image-editor.php */
			$output_formats = apply_filters( 'image_editor_output_format', array(), $_dir . $filename, $mime_type );
			$alt_types      = array();

if ( ! empty( $output_formats[ $mime_type ] ) ) {
				// The image will be converted to this format/mime type.
				$alt_mime_type = $output_formats[ $mime_type ];

// Other types of images whose names may conflict if their sub-sizes are regenerated.
				$alt_types   = array_keys( array_intersect( $output_formats, array( $mime_type, $alt_mime_type ) ) );
				$alt_types[] = $alt_mime_type;
			} elseif ( ! empty( $output_formats ) ) {
				$alt_types = array_keys( array_intersect( $output_formats, array( $mime_type ) ) );
			}

// Remove duplicates and the original mime type. It will be added later if needed.
			$alt_types = array_unique( array_diff( $alt_types, array( $mime_type ) ) );

foreach ( $alt_types as $alt_type ) {
				$alt_ext = wp_get_default_extension_for_mime_type( $alt_type );

if ( ! $alt_ext ) {
					continue;
				}

$alt_ext      = ".{$alt_ext}";
				$alt_filename = preg_replace( '|' . preg_quote( $lc_ext ) . '$|', $alt_ext, $filename );

$alt_filenames[ $alt_ext ] = $alt_filename;
			}

if ( ! empty( $alt_filenames ) ) {
				/*
				 * Add the original filename. It needs to be checked again
				 * together with the alternate filenames when $number is incremented.
				 */
				$alt_filenames[ $lc_ext ] = $filename;

// Ensure no infinite loop.
				$i = 0;

while ( $i <= $count && _wp_check_alternate_file_names( $alt_filenames, $_dir, $files ) ) {
					$new_number = (int) $number + 1;

foreach ( $alt_filenames as $alt_ext => $alt_filename ) {
						$alt_filenames[ $alt_ext ] = str_replace(
							array( "-{$number}{$alt_ext}", "{$number}{$alt_ext}" ),
							"-{$new_number}{$alt_ext}",
							$alt_filename
						);
					}

/*
					 * Also update the $number in (the output) $filename.
					 * If the extension was uppercase it was already replaced with the lowercase version.
					 */
					$filename = str_replace(
						array( "-{$number}{$lc_ext}", "{$number}{$lc_ext}" ),
						"-{$new_number}{$lc_ext}",
						$filename
					);

$number = $new_number;
					++$i;
				}
			}
		}
	}

/**
	 * Filters the result when generating a unique file name.
	 *
	 * @since 4.5.0
	 * @since 5.8.1 The `$alt_filenames` and `$number` parameters were added.
	 *
	 * @param string        $filename                 Unique file name.
	 * @param string        $ext                      File extension. Example: ".png".
	 * @param string        $dir                      Directory path.
	 * @param callable|null $unique_filename_callback Callback function that generates the unique file name.
	 * @param string[]      $alt_filenames            Array of alternate file names that were checked for collisions.
	 * @param int|string    $number                   The highest number that was used to make the file name unique
	 *                                                or an empty string if unused.
	 */
	return apply_filters( 'wp_unique_filename', $filename, $ext, $dir, $unique_filename_callback, $alt_filenames, $number );
}

/**
 * Helper function to test if each of an array of file names could conflict with existing files.
 *
 * @since 5.8.1
 * @access private
 *
 * @param string[] $filenames Array of file names to check.
 * @param string   $dir       The directory containing the files.
 * @param array    $files     An array of existing files in the directory. May be empty.
 * @return bool True if the tested file name could match an existing file, false otherwise.
 */
function _wp_check_alternate_file_names( $filenames, $dir, $files ) {
	foreach ( $filenames as $filename ) {
		if ( file_exists( $dir . $filename ) ) {
			return true;
		}

if ( ! empty( $files ) && _wp_check_existing_file_names( $filename, $files ) ) {
			return true;
		}
	}

return false;
}

/**
 * Helper function to check if a file name could match an existing image sub-size file name.
 *
 * @since 5.3.1
 * @access private
 *
 * @param string $filename The file name to check.
 * @param array  $files    An array of existing files in the directory.
 * @return bool True if the tested file name could match an existing file, false otherwise.
 */
function _wp_check_existing_file_names( $filename, $files ) {
	$fname = pathinfo( $filename, PATHINFO_FILENAME );
	$ext   = pathinfo( $filename, PATHINFO_EXTENSION );

// Edge case, file names like `.ext`.
	if ( empty( $fname ) ) {
		return false;
	}

if ( $ext ) {
		$ext = ".$ext";
	}

$regex = '/^' . preg_quote( $fname ) . '-(?:\d+x\d+|scaled|rotated)' . preg_quote( $ext ) . '$/i';

foreach ( $files as $file ) {
		if ( preg_match( $regex, $file ) ) {
			return true;
		}
	}

return false;
}

/**
 * Creates a file in the upload folder with given content.
 *
 * If there is an error, then the key 'error' will exist with the error message.
 * If success, then the key 'file' will have the unique file path, the 'url' key
 * will have the link to the new file. and the 'error' key will be set to false.
 *
 * This function will not move an uploaded file to the upload folder. It will
 * create a new file with the content in $bits parameter. If you move the upload
 * file, read the content of the uploaded file, and then you can give the
 * filename and content to this function, which will add it to the upload
 * folder.
 *
 * The permissions will be set on the new file automatically by this function.
 *
 * @since 2.0.0
 *
 * @param string      $name       Filename.
 * @param null|string $deprecated Never used. Set to null.
 * @param string      $bits       File content
 * @param string      $time       Optional. Time formatted in 'yyyy/mm'. Default null.
 * @return array {
 *     Information about the newly-uploaded file.
 *
 *     @type string       $file  Filename of the newly-uploaded file.
 *     @type string       $url   URL of the uploaded file.
 *     @type string       $type  File type.
 *     @type string|false $error Error message, if there has been an error.
 * }
 */
function wp_upload_bits( $name, $deprecated, $bits, $time = null ) {
	if ( ! empty( $deprecated ) ) {
		_deprecated_argument( __FUNCTION__, '2.0.0' );
	}

if ( empty( $name ) ) {
		return array( 'error' => __( 'Empty filename' ) );
	}

$wp_filetype = wp_check_filetype( $name );
	if ( ! $wp_filetype['ext'] && ! current_user_can( 'unfiltered_upload' ) ) {
		return array( 'error' => __( 'Sorry, you are not allowed to upload this file type.' ) );
	}

$upload = wp_upload_dir( $time );

if ( false !== $upload['error'] ) {
		return $upload;
	}

/**
	 * Filters whether to treat the upload bits as an error.
	 *
	 * Returning a non-array from the filter will effectively short-circuit preparing the upload bits
	 * and return that value instead. An error message should be returned as a string.
	 *
	 * @since 3.0.0
	 *
	 * @param array|string $upload_bits_error An array of upload bits data, or error message to return.
	 */
	$upload_bits_error = apply_filters(
		'wp_upload_bits',
		array(
			'name' => $name,
			'bits' => $bits,
			'time' => $time,
		)
	);
	if ( ! is_array( $upload_bits_error ) ) {
		$upload['error'] = $upload_bits_error;
		return $upload;
	}

$filename = wp_unique_filename( $upload['path'], $name );

$new_file = $upload['path'] . "/$filename";
	if ( ! wp_mkdir_p( dirname( $new_file ) ) ) {
		if ( str_starts_with( $upload['basedir'], ABSPATH ) ) {
			$error_path = str_replace( ABSPATH, '', $upload['basedir'] ) . $upload['subdir'];
		} else {
			$error_path = wp_basename( $upload['basedir'] ) . $upload['subdir'];
		}

$message = sprintf(
			/* translators: %s: Directory path. */
			__( 'Unable to create directory %s. Is its parent directory writable by the server?' ),
			$error_path
		);
		return array( 'error' => $message );
	}

$ifp = @fopen( $new_file, 'wb' );
	if ( ! $ifp ) {
		return array(
			/* translators: %s: File name. */
			'error' => sprintf( __( 'Could not write file %s' ), $new_file ),
		);
	}

fwrite( $ifp, $bits );
	fclose( $ifp );
	clearstatcache();

// Set correct file permissions.
	$stat  = @ stat( dirname( $new_file ) );
	$perms = $stat['mode'] & 0007777;
	$perms = $perms & 0000666;
	chmod( $new_file, $perms );
	clearstatcache();

// Compute the URL.
	$url = $upload['url'] . "/$filename";

if ( is_multisite() ) {
		clean_dirsize_cache( $new_file );
	}

/** This filter is documented in wp-admin/includes/file.php */
	return apply_filters(
		'wp_handle_upload',
		array(
			'file'  => $new_file,
			'url'   => $url,
			'type'  => $wp_filetype['type'],
			'error' => false,
		),
		'sideload'
	);
}

/**
 * Retrieves the file type based on the extension name.
 *
 * @since 2.5.0
 *
 * @param string $ext The extension to search.
 * @return string|void The file type, example: audio, video, document, spreadsheet, etc.
 */
function wp_ext2type( $ext ) {
	$ext = strtolower( $ext );

$ext2type = wp_get_ext_types();
	foreach ( $ext2type as $type => $exts ) {
		if ( in_array( $ext, $exts, true ) ) {
			return $type;
		}
	}
}

/**
 * Returns first matched extension for the mime-type,
 * as mapped from wp_get_mime_types().
 *
 * @since 5.8.1
 *
 * @param string $mime_type
 *
 * @return string|false
 */
function wp_get_default_extension_for_mime_type( $mime_type ) {
	$extensions = explode( '|', array_search( $mime_type, wp_get_mime_types(), true ) );

if ( empty( $extensions[0] ) ) {
		return false;
	}

return $extensions[0];
}

/**
 * Retrieves the file type from the file name.
 *
 * You can optionally define the mime array, if needed.
 *
 * @since 2.0.4
 *
 * @param string        $filename File name or path.
 * @param string[]|null $mimes    Optional. Array of allowed mime types keyed by their file extension regex.
 *                                Defaults to the result of get_allowed_mime_types().
 * @return array {
 *     Values for the extension and mime type.
 *
 *     @type string|false $ext  File extension, or false if the file doesn't match a mime type.
 *     @type string|false $type File mime type, or false if the file doesn't match a mime type.
 * }
 */
function wp_check_filetype( $filename, $mimes = null ) {
	if ( empty( $mimes ) ) {
		$mimes = get_allowed_mime_types();
	}
	$type = false;
	$ext  = false;

foreach ( $mimes as $ext_preg => $mime_match ) {
		$ext_preg = '!\.(' . $ext_preg . ')$!i';
		if ( preg_match( $ext_preg, $filename, $ext_matches ) ) {
			$type = $mime_match;
			$ext  = $ext_matches[1];
			break;
		}
	}

return compact( 'ext', 'type' );
}

/**
 * Attempts to determine the real file type of a file.
 *
 * If unable to, the file name extension will be used to determine type.
 *
 * If it's determined that the extension does not match the file's real type,
 * then the "proper_filename" value will be set with a proper filename and extension.
 *
 * Currently this function only supports renaming images validated via wp_get_image_mime().
 *
 * @since 3.0.0
 *
 * @param string        $file     Full path to the file.
 * @param string        $filename The name of the file (may differ from $file due to $file being
 *                                in a tmp directory).
 * @param string[]|null $mimes    Optional. Array of allowed mime types keyed by their file extension regex.
 *                                Defaults to the result of get_allowed_mime_types().
 * @return array {
 *     Values for the extension, mime type, and corrected filename.
 *
 *     @type string|false $ext             File extension, or false if the file doesn't match a mime type.
 *     @type string|false $type            File mime type, or false if the file doesn't match a mime type.
 *     @type string|false $proper_filename File name with its correct extension, or false if it cannot be determined.
 * }
 */
function wp_check_filetype_and_ext( $file, $filename, $mimes = null ) {
	$proper_filename = false;

// Do basic extension validation and MIME mapping.
	$wp_filetype = wp_check_filetype( $filename, $mimes );
	$ext         = $wp_filetype['ext'];
	$type        = $wp_filetype['type'];

// We can't do any further validation without a file to work with.
	if ( ! file_exists( $file ) ) {
		return compact( 'ext', 'type', 'proper_filename' );
	}

$real_mime = false;

// Validate image types.
	if ( $type && str_starts_with( $type, 'image/' ) ) {

// Attempt to figure out what type of image it actually is.
		$real_mime = wp_get_image_mime( $file );

if ( $real_mime && $real_mime !== $type ) {
			/**
			 * Filters the list mapping image mime types to their respective extensions.
			 *
			 * @since 3.0.0
			 *
			 * @param array $mime_to_ext Array of image mime types and their matching extensions.
			 */
			$mime_to_ext = apply_filters(
				'getimagesize_mimes_to_exts',
				array(
					'image/jpeg' => 'jpg',
					'image/png'  => 'png',
					'image/gif'  => 'gif',
					'image/bmp'  => 'bmp',
					'image/tiff' => 'tif',
					'image/webp' => 'webp',
					'image/avif' => 'avif',
				)
			);

// Replace whatever is after the last period in the filename with the correct extension.
			if ( ! empty( $mime_to_ext[ $real_mime ] ) ) {
				$filename_parts = explode( '.', $filename );
				array_pop( $filename_parts );
				$filename_parts[] = $mime_to_ext[ $real_mime ];
				$new_filename     = implode( '.', $filename_parts );

if ( $new_filename !== $filename ) {
					$proper_filename = $new_filename; // Mark that it changed.
				}

// Redefine the extension / MIME.
				$wp_filetype = wp_check_filetype( $new_filename, $mimes );
				$ext         = $wp_filetype['ext'];
				$type        = $wp_filetype['type'];
			} else {
				// Reset $real_mime and try validating again.
				$real_mime = false;
			}
		}
	}

// Validate files that didn't get validated during previous checks.
	if ( $type && ! $real_mime && extension_loaded( 'fileinfo' ) ) {
		$finfo     = finfo_open( FILEINFO_MIME_TYPE );
		$real_mime = finfo_file( $finfo, $file );
		finfo_close( $finfo );

$google_docs_types = array(
			'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
			'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
		);

foreach ( $google_docs_types as $google_docs_type ) {
			/*
			 * finfo_file() can return duplicate mime type for Google docs,
			 * this conditional reduces it to a single instance.
			 *
			 * @see https://bugs.php.net/bug.php?id=77784
			 * @see https://core.trac.wordpress.org/ticket/57898
			 */
			if ( 2 === substr_count( $real_mime, $google_docs_type ) ) {
				$real_mime = $google_docs_type;
			}
		}

// fileinfo often misidentifies obscure files as one of these types.
		$nonspecific_types = array(
			'application/octet-stream',
			'application/encrypted',
			'application/CDFV2-encrypted',
			'application/zip',
		);

/*
		 * If $real_mime doesn't match the content type we're expecting from the file's extension,
		 * we need to do some additional vetting. Media types and those listed in $nonspecific_types are
		 * allowed some leeway, but anything else must exactly match the real content type.
		 */
		if ( in_array( $real_mime, $nonspecific_types, true ) ) {
			// File is a non-specific binary type. That's ok if it's a type that generally tends to be binary.
			if ( ! in_array( substr( $type, 0, strcspn( $type, '/' ) ), array( 'application', 'video', 'audio' ), true ) ) {
				$type = false;
				$ext  = false;
			}
		} elseif ( str_starts_with( $real_mime, 'video/' ) || str_starts_with( $real_mime, 'audio/' ) ) {
			/*
			 * For these types, only the major type must match the real value.
			 * This means that common mismatches are forgiven: application/vnd.apple.numbers is often misidentified as application/zip,
			 * and some media files are commonly named with the wrong extension (.mov instead of .mp4)
			 */
			if ( substr( $real_mime, 0, strcspn( $real_mime, '/' ) ) !== substr( $type, 0, strcspn( $type, '/' ) ) ) {
				$type = false;
				$ext  = false;
			}
		} elseif ( 'text/plain' === $real_mime ) {
			// A few common file types are occasionally detected as text/plain; allow those.
			if ( ! in_array(
				$type,
				array(
					'text/plain',
					'text/csv',
					'application/csv',
					'text/richtext',
					'text/tsv',
					'text/vtt',
				),
				true
			)
			) {
				$type = false;
				$ext  = false;
			}
		} elseif ( 'application/csv' === $real_mime ) {
			// Special casing for CSV files.
			if ( ! in_array(
				$type,
				array(
					'text/csv',
					'text/plain',
					'application/csv',
				),
				true
			)
			) {
				$type = false;
				$ext  = false;
			}
		} elseif ( 'text/rtf' === $real_mime ) {
			// Special casing for RTF files.
			if ( ! in_array(
				$type,
				array(
					'text/rtf',
					'text/plain',
					'application/rtf',
				),
				true
			)
			) {
				$type = false;
				$ext  = false;
			}
		} else {
			if ( $type !== $real_mime ) {
				/*
				 * Everything else including image/* and application/*:
				 * If the real content type doesn't match the file extension, assume it's dangerous.
				 */
				$type = false;
				$ext  = false;
			}
		}
	}

// The mime type must be allowed.
	if ( $type ) {
		$allowed = get_allowed_mime_types();

if ( ! in_array( $type, $allowed, true ) ) {
			$type = false;
			$ext  = false;
		}
	}

/**
	 * Filters the "real" file type of the given file.
	 *
	 * @since 3.0.0
	 * @since 5.1.0 The $real_mime parameter was added.
	 *
	 * @param array         $wp_check_filetype_and_ext {
	 *     Values for the extension, mime type, and corrected filename.
	 *
	 *     @type string|false $ext             File extension, or false if the file doesn't match a mime type.
	 *     @type string|false $type            File mime type, or false if the file doesn't match a mime type.
	 *     @type string|false $proper_filename File name with its correct extension, or false if it cannot be determined.
	 * }
	 * @param string        $file                      Full path to the file.
	 * @param string        $filename                  The name of the file (may differ from $file due to
	 *                                                 $file being in a tmp directory).
	 * @param string[]|null $mimes                     Array of mime types keyed by their file extension regex, or null if
	 *                                                 none were provided.
	 * @param string|false  $real_mime                 The actual mime type or false if the type cannot be determined.
	 */
	return apply_filters( 'wp_check_filetype_and_ext', compact( 'ext', 'type', 'proper_filename' ), $file, $filename, $mimes, $real_mime );
}

/**
 * Returns the real mime type of an image file.
 *
 * This depends on exif_imagetype() or getimagesize() to determine real mime types.
 *
 * @since 4.7.1
 * @since 5.8.0 Added support for WebP images.
 * @since 6.5.0 Added support for AVIF images.
 *
 * @param string $file Full path to the file.
 * @return string|false The actual mime type or false if the type cannot be determined.
 */
function wp_get_image_mime( $file ) {
	/*
	 * Use exif_imagetype() to check the mimetype if available or fall back to
	 * getimagesize() if exif isn't available. If either function throws an Exception
	 * we assume the file could not be validated.
	 */
	try {
		if ( is_callable( 'exif_imagetype' ) ) {
			$imagetype = exif_imagetype( $file );
			$mime      = ( $imagetype ) ? image_type_to_mime_type( $imagetype ) : false;
		} elseif ( function_exists( 'getimagesize' ) ) {
			// Don't silence errors when in debug mode, unless running unit tests.
			if ( defined( 'WP_DEBUG' ) && WP_DEBUG
				&& ! defined( 'WP_RUN_CORE_TESTS' )
			) {
				// Not using wp_getimagesize() here to avoid an infinite loop.
				$imagesize = getimagesize( $file );
			} else {
				$imagesize = @getimagesize( $file );
			}

$mime = ( isset( $imagesize['mime'] ) ) ? $imagesize['mime'] : false;
		} else {
			$mime = false;
		}

if ( false !== $mime ) {
			return $mime;
		}

$magic = file_get_contents( $file, false, null, 0, 12 );

if ( false === $magic ) {
			return false;
		}

/*
		 * Add WebP fallback detection when image library doesn't support WebP.
		 * Note: detection values come from LibWebP, see
		 * https://github.com/webmproject/libwebp/blob/master/imageio/image_dec.c#L30
		 */
		$magic = bin2hex( $magic );
		if (
			// RIFF.
			( str_starts_with( $magic, '52494646' ) ) &&
			// WEBP.
			( 16 === strpos( $magic, '57454250' ) )
		) {
			$mime = 'image/webp';
		}

/**
		 * Add AVIF fallback detection when image library doesn't support AVIF.
		 *
		 * Detection based on section 4.3.1 File-type box definition of the ISO/IEC 14496-12
		 * specification and the AV1-AVIF spec, see https://aomediacodec.github.io/av1-avif/v1.1.0.html#brands.
		 */

// Divide the header string into 4 byte groups.
		$magic = str_split( $magic, 8 );

if (
			isset( $magic[1] ) &&
			isset( $magic[2] ) &&
			'ftyp' === hex2bin( $magic[1] ) &&
			( 'avif' === hex2bin( $magic[2] ) || 'avis' === hex2bin( $magic[2] ) )
		) {
			$mime = 'image/avif';
		}
	} catch ( Exception $e ) {
		$mime = false;
	}

return $mime;
}

/**
 * Retrieves the list of mime types and file extensions.
 *
 * @since 3.5.0
 * @since 4.2.0 Support was added for GIMP (.xcf) files.
 * @since 4.9.2 Support was added for Flac (.flac) files.
 * @since 4.9.6 Support was added for AAC (.aac) files.
 *
 * @return string[] Array of mime types keyed by the file extension regex corresponding to those types.
 */
function wp_get_mime_types() {
	/**
	 * Filters the list of mime types and file extensions.
	 *
	 * This filter should be used to add, not remove, mime types. To remove
	 * mime types, use the {@see 'upload_mimes'} filter.
	 *
	 * @since 3.5.0
	 *
	 * @param string[] $wp_get_mime_types Mime types keyed by the file extension regex
	 *                                    corresponding to those types.
	 */
	return apply_filters(
		'mime_types',
		array(
			// Image formats.
			'jpg|jpeg|jpe'                 => 'image/jpeg',
			'gif'                          => 'image/gif',
			'png'                          => 'image/png',
			'bmp'                          => 'image/bmp',
			'tiff|tif'                     => 'image/tiff',
			'webp'                         => 'image/webp',
			'avif'                         => 'image/avif',
			'ico'                          => 'image/x-icon',
			'heic'                         => 'image/heic',
			// Video formats.
			'asf|asx'                      => 'video/x-ms-asf',
			'wmv'                          => 'video/x-ms-wmv',
			'wmx'                          => 'video/x-ms-wmx',
			'wm'                           => 'video/x-ms-wm',
			'avi'                          => 'video/avi',
			'divx'                         => 'video/divx',
			'flv'                          => 'video/x-flv',
			'mov|qt'                       => 'video/quicktime',
			'mpeg|mpg|mpe'                 => 'video/mpeg',
			'mp4|m4v'                      => 'video/mp4',
			'ogv'                          => 'video/ogg',
			'webm'                         => 'video/webm',
			'mkv'                          => 'video/x-matroska',
			'3gp|3gpp'                     => 'video/3gpp',  // Can also be audio.
			'3g2|3gp2'                     => 'video/3gpp2', // Can also be audio.
			// Text formats.
			'txt|asc|c|cc|h|srt'           => 'text/plain',
			'csv'                          => 'text/csv',
			'tsv'                          => 'text/tab-separated-values',
			'ics'                          => 'text/calendar',
			'rtx'                          => 'text/richtext',
			'css'                          => 'text/css',
			'htm|html'                     => 'text/html',
			'vtt'                          => 'text/vtt',
			'dfxp'                         => 'application/ttaf+xml',
			// Audio formats.
			'mp3|m4a|m4b'                  => 'audio/mpeg',
			'aac'                          => 'audio/aac',
			'ra|ram'                       => 'audio/x-realaudio',
			'wav'                          => 'audio/wav',
			'ogg|oga'                      => 'audio/ogg',
			'flac'                         => 'audio/flac',
			'mid|midi'                     => 'audio/midi',
			'wma'                          => 'audio/x-ms-wma',
			'wax'                          => 'audio/x-ms-wax',
			'mka'                          => 'audio/x-matroska',
			// Misc application formats.
			'rtf'                          => 'application/rtf',
			'js'                           => 'application/javascript',
			'pdf'                          => 'application/pdf',
			'swf'                          => 'application/x-shockwave-flash',
			'class'                        => 'application/java',
			'tar'                          => 'application/x-tar',
			'zip'                          => 'application/zip',
			'gz|gzip'                      => 'application/x-gzip',
			'rar'                          => 'application/rar',
			'7z'                           => 'application/x-7z-compressed',
			'exe'                          => 'application/x-msdownload',
			'psd'                          => 'application/octet-stream',
			'xcf'                          => 'application/octet-stream',
			// MS Office formats.
			'doc'                          => 'application/msword',
			'pot|pps|ppt'                  => 'application/vnd.ms-powerpoint',
			'wri'                          => 'application/vnd.ms-write',
			'xla|xls|xlt|xlw'              => 'application/vnd.ms-excel',
			'mdb'                          => 'application/vnd.ms-access',
			'mpp'                          => 'application/vnd.ms-project',
			'docx'                         => 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
			'docm'                         => 'application/vnd.ms-word.document.macroEnabled.12',
			'dotx'                         => 'application/vnd.openxmlformats-officedocument.wordprocessingml.template',
			'dotm'                         => 'application/vnd.ms-word.template.macroEnabled.12',
			'xlsx'                         => 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
			'xlsm'                         => 'application/vnd.ms-excel.sheet.macroEnabled.12',
			'xlsb'                         => 'application/vnd.ms-excel.sheet.binary.macroEnabled.12',
			'xltx'                         => 'application/vnd.openxmlformats-officedocument.spreadsheetml.template',
			'xltm'                         => 'application/vnd.ms-excel.template.macroEnabled.12',
			'xlam'                         => 'application/vnd.ms-excel.addin.macroEnabled.12',
			'pptx'                         => 'application/vnd.openxmlformats-officedocument.presentationml.presentation',
			'pptm'                         => 'application/vnd.ms-powerpoint.presentation.macroEnabled.12',
			'ppsx'                         => 'application/vnd.openxmlformats-officedocument.presentationml.slideshow',
			'ppsm'                         => 'application/vnd.ms-powerpoint.slideshow.macroEnabled.12',
			'potx'                         => 'application/vnd.openxmlformats-officedocument.presentationml.template',
			'potm'                         => 'application/vnd.ms-powerpoint.template.macroEnabled.12',
			'ppam'                         => 'application/vnd.ms-powerpoint.addin.macroEnabled.12',
			'sldx'                         => 'application/vnd.openxmlformats-officedocument.presentationml.slide',
			'sldm'                         => 'application/vnd.ms-powerpoint.slide.macroEnabled.12',
			'onetoc|onetoc2|onetmp|onepkg' => 'application/onenote',
			'oxps'                         => 'application/oxps',
			'xps'                          => 'application/vnd.ms-xpsdocument',
			// OpenOffice formats.
			'odt'                          => 'application/vnd.oasis.opendocument.text',
			'odp'                          => 'application/vnd.oasis.opendocument.presentation',
			'ods'                          => 'application/vnd.oasis.opendocument.spreadsheet',
			'odg'                          => 'application/vnd.oasis.opendocument.graphics',
			'odc'                          => 'application/vnd.oasis.opendocument.chart',
			'odb'                          => 'application/vnd.oasis.opendocument.database',
			'odf'                          => 'application/vnd.oasis.opendocument.formula',
			// WordPerfect formats.
			'wp|wpd'                       => 'application/wordperfect',
			// iWork formats.
			'key'                          => 'application/vnd.apple.keynote',
			'numbers'                      => 'application/vnd.apple.numbers',
			'pages'                        => 'application/vnd.apple.pages',
		)
	);
}

/**
 * Retrieves the list of common file extensions and their types.
 *
 * @since 4.6.0
 *
 * @return array[] Multi-dimensional array of file extensions types keyed by the type of file.
 */
function wp_get_ext_types() {

/**
	 * Filters file type based on the extension name.
	 *
	 * @since 2.5.0
	 *
	 * @see wp_ext2type()
	 *
	 * @param array[] $ext2type Multi-dimensional array of file extensions types keyed by the type of file.
	 */
	return apply_filters(
		'ext2type',
		array(
			'image'       => array( 'jpg', 'jpeg', 'jpe', 'gif', 'png', 'bmp', 'tif', 'tiff', 'ico', 'heic', 'webp', 'avif' ),
			'audio'       => array( 'aac', 'ac3', 'aif', 'aiff', 'flac', 'm3a', 'm4a', 'm4b', 'mka', 'mp1', 'mp2', 'mp3', 'ogg', 'oga', 'ram', 'wav', 'wma' ),
			'video'       => array( '3g2', '3gp', '3gpp', 'asf', 'avi', 'divx', 'dv', 'flv', 'm4v', 'mkv', 'mov', 'mp4', 'mpeg', 'mpg', 'mpv', 'ogm', 'ogv', 'qt', 'rm', 'vob', 'wmv' ),
			'document'    => array( 'doc', 'docx', 'docm', 'dotm', 'odt', 'pages', 'pdf', 'xps', 'oxps', 'rtf', 'wp', 'wpd', 'psd', 'xcf' ),
			'spreadsheet' => array( 'numbers', 'ods', 'xls', 'xlsx', 'xlsm', 'xlsb' ),
			'interactive' => array( 'swf', 'key', 'ppt', 'pptx', 'pptm', 'pps', 'ppsx', 'ppsm', 'sldx', 'sldm', 'odp' ),
			'text'        => array( 'asc', 'csv', 'tsv', 'txt' ),
			'archive'     => array( 'bz2', 'cab', 'dmg', 'gz', 'rar', 'sea', 'sit', 'sqx', 'tar', 'tgz', 'zip', '7z' ),
			'code'        => array( 'css', 'htm', 'html', 'php', 'js' ),
		)
	);
}

/**
 * Wrapper for PHP filesize with filters and casting the result as an integer.
 *
 * @since 6.0.0
 *
 * @link https://www.php.net/manual/en/function.filesize.php
 *
 * @param string $path Path to the file.
 * @return int The size of the file in bytes, or 0 in the event of an error.
 */
function wp_filesize( $path ) {
	/**
	 * Filters the result of wp_filesize before the PHP function is run.
	 *
	 * @since 6.0.0
	 *
	 * @param null|int $size The unfiltered value. Returning an int from the callback bypasses the filesize call.
	 * @param string   $path Path to the file.
	 */
	$size = apply_filters( 'pre_wp_filesize', null, $path );

if ( is_int( $size ) ) {
		return $size;
	}

$size = file_exists( $path ) ? (int) filesize( $path ) : 0;

/**
	 * Filters the size of the file.
	 *
	 * @since 6.0.0
	 *
	 * @param int    $size The result of PHP filesize on the file.
	 * @param string $path Path to the file.
	 */
	return (int) apply_filters( 'wp_filesize', $size, $path );
}

/**
 * Retrieves the list of allowed mime types and file extensions.
 *
 * @since 2.8.6
 *
 * @param int|WP_User $user Optional. User to check. Defaults to current user.
 * @return string[] Array of mime types keyed by the file extension regex corresponding
 *                  to those types.
 */
function get_allowed_mime_types( $user = null ) {
	$t = wp_get_mime_types();

unset( $t['swf'], $t['exe'] );
	if ( function_exists( 'current_user_can' ) ) {
		$unfiltered = $user ? user_can( $user, 'unfiltered_html' ) : current_user_can( 'unfiltered_html' );
	}

if ( empty( $unfiltered ) ) {
		unset( $t['htm|html'], $t['js'] );
	}

/**
	 * Filters the list of allowed mime types and file extensions.
	 *
	 * @since 2.0.0
	 *
	 * @param array            $t    Mime types keyed by the file extension regex corresponding to those types.
	 * @param int|WP_User|null $user User ID, User object or null if not provided (indicates current user).
	 */
	return apply_filters( 'upload_mimes', $t, $user );
}

/**
 * Displays "Are You Sure" message to confirm the action being taken.
 *
 * If the action has the nonce explain message, then it will be displayed
 * along with the "Are you sure?" message.
 *
 * @since 2.0.4
 *
 * @param string $action The nonce action.
 */
function wp_nonce_ays( $action ) {
	// Default title and response code.
	$title         = __( 'Something went wrong.' );
	$response_code = 403;

if ( 'log-out' === $action ) {
		$title = sprintf(
			/* translators: %s: Site title. */
			__( 'You are attempting to log out of %s' ),
			get_bloginfo( 'name' )
		);

$redirect_to = isset( $_REQUEST['redirect_to'] ) ? $_REQUEST['redirect_to'] : '';

$html = $title;
		$html .= '';
		$html .= sprintf(
			/* translators: %s: Logout URL. */
			__( 'Do you really want to <a href="%s">log out</a>?' ),
			wp_logout_url( $redirect_to )
		);
	} else {
		$html = __( 'The link you followed has expired.' );

if ( wp_get_referer() ) {
			$wp_http_referer = remove_query_arg( 'updated', wp_get_referer() );
			$wp_http_referer = wp_validate_redirect( sanitize_url( $wp_http_referer ) );

$html .= '';
			$html .= sprintf(
				'<a href="%s">%s</a>',
				esc_url( $wp_http_referer ),
				__( 'Please try again.' )
			);
		}
	}

wp_die( $html, $title, $response_code );
}

/**
 * Kills WordPress execution and displays HTML page with an error message.
 *
 * This function complements the `die()` PHP function. The difference is that
 * HTML will be displayed to the user. It is recommended to use this function
 * only when the execution should not continue any further. It is not recommended
 * to call this function very often, and try to handle as many errors as possible
 * silently or more gracefully.
 *
 * As a shorthand, the desired HTTP response code may be passed as an integer to
 * the `$title` parameter (the default title would apply) or the `$args` parameter.
 *
 * @since 2.0.4
 * @since 4.1.0 The `$title` and `$args` parameters were changed to optionally accept
 *              an integer to be used as the response code.
 * @since 5.1.0 The `$link_url`, `$link_text`, and `$exit` arguments were added.
 * @since 5.3.0 The `$charset` argument was added.
 * @since 5.5.0 The `$text_direction` argument has a priority over get_language_attributes()
 *              in the default handler.
 *
 * @global WP_Query $wp_query WordPress Query object.
 *
 * @param string|WP_Error  $message Optional. Error message. If this is a WP_Error object,
 *                                  and not an Ajax or XML-RPC request, the error's messages are used.
 *                                  Default empty string.
 * @param string|int       $title   Optional. Error title. If `$message` is a `WP_Error` object,
 *                                  error data with the key 'title' may be used to specify the title.
 *                                  If `$title` is an integer, then it is treated as the response code.
 *                                  Default empty string.
 * @param string|array|int $args {
 *     Optional. Arguments to control behavior. If `$args` is an integer, then it is treated
 *     as the response code. Default empty array.
 *
 *     @type int    $response       The HTTP response code. Default 200 for Ajax requests, 500 otherwise.
 *     @type string $link_url       A URL to include a link to. Only works in combination with $link_text.
 *                                  Default empty string.
 *     @type string $link_text      A label for the link to include. Only works in combination with $link_url.
 *                                  Default empty string.
 *     @type bool   $back_link      Whether to include a link to go back. Default false.
 *     @type string $text_direction The text direction. This is only useful internally, when WordPress is still
 *                                  loading and the site's locale is not set up yet. Accepts 'rtl' and 'ltr'.
 *                                  Default is the value of is_rtl().
 *     @type string $charset        Character set of the HTML output. Default 'utf-8'.
 *     @type string $code           Error code to use. Default is 'wp_die', or the main error code if $message
 *                                  is a WP_Error.
 *     @type bool   $exit           Whether to exit the process after completion. Default true.
 * }
 */
function wp_die( $message = '', $title = '', $args = array() ) {
	global $wp_query;

if ( is_int( $args ) ) {
		$args = array( 'response' => $args );
	} elseif ( is_int( $title ) ) {
		$args  = array( 'response' => $title );
		$title = '';
	}

if ( wp_doing_ajax() ) {
		/**
		 * Filters the callback for killing WordPress execution for Ajax requests.
		 *
		 * @since 3.4.0
		 *
		 * @param callable $callback Callback function name.
		 */
		$callback = apply_filters( 'wp_die_ajax_handler', '_ajax_wp_die_handler' );
	} elseif ( wp_is_json_request() ) {
		/**
		 * Filters the callback for killing WordPress execution for JSON requests.
		 *
		 * @since 5.1.0
		 *
		 * @param callable $callback Callback function name.
		 */
		$callback = apply_filters( 'wp_die_json_handler', '_json_wp_die_handler' );
	} elseif ( wp_is_serving_rest_request() && wp_is_jsonp_request() ) {
		/**
		 * Filters the callback for killing WordPress execution for JSONP REST requests.
		 *
		 * @since 5.2.0
		 *
		 * @param callable $callback Callback function name.
		 */
		$callback = apply_filters( 'wp_die_jsonp_handler', '_jsonp_wp_die_handler' );
	} elseif ( defined( 'XMLRPC_REQUEST' ) && XMLRPC_REQUEST ) {
		/**
		 * Filters the callback for killing WordPress execution for XML-RPC requests.
		 *
		 * @since 3.4.0
		 *
		 * @param callable $callback Callback function name.
		 */
		$callback = apply_filters( 'wp_die_xmlrpc_handler', '_xmlrpc_wp_die_handler' );
	} elseif ( wp_is_xml_request()
		|| isset( $wp_query ) &&
			( function_exists( 'is_feed' ) && is_feed()
			|| function_exists( 'is_comment_feed' ) && is_comment_feed()
			|| function_exists( 'is_trackback' ) && is_trackback() ) ) {
		/**
		 * Filters the callback for killing WordPress execution for XML requests.
		 *
		 * @since 5.2.0
		 *
		 * @param callable $callback Callback function name.
		 */
		$callback = apply_filters( 'wp_die_xml_handler', '_xml_wp_die_handler' );
	} else {
		/**
		 * Filters the callback for killing WordPress execution for all non-Ajax, non-JSON, non-XML requests.
		 *
		 * @since 3.0.0
		 *
		 * @param callable $callback Callback function name.
		 */
		$callback = apply_filters( 'wp_die_handler', '_default_wp_die_handler' );
	}

call_user_func( $callback, $message, $title, $args );
}

/**
 * Kills WordPress execution and displays HTML page with an error message.
 *
 * This is the default handler for wp_die(). If you want a custom one,
 * you can override this using the {@see 'wp_die_handler'} filter in wp_die().
 *
 * @since 3.0.0
 * @access private
 *
 * @param string|WP_Error $message Error message or WP_Error object.
 * @param string          $title   Optional. Error title. Default empty string.
 * @param string|array    $args    Optional. Arguments to control behavior. Default empty array.
 */
function _default_wp_die_handler( $message, $title = '', $args = array() ) {
	list( $message, $title, $parsed_args ) = _wp_die_process_input( $message, $title, $args );

if ( is_string( $message ) ) {
		if ( ! empty( $parsed_args['additional_errors'] ) ) {
			$message = array_merge(
				array( $message ),
				wp_list_pluck( $parsed_args['additional_errors'], 'message' )
			);
			$message = "<ul>\n\t\t<li>" . implode( "</li>\n\t\t<li>", $message ) . "</li>\n\t</ul>";
		}

$message = sprintf(
			'<div class="wp-die-message">%s</div>',
			$message
		);
	}

$have_gettext = function_exists( '__' );

if ( ! empty( $parsed_args['link_url'] ) && ! empty( $parsed_args['link_text'] ) ) {
		$link_url = $parsed_args['link_url'];
		if ( function_exists( 'esc_url' ) ) {
			$link_url = esc_url( $link_url );
		}
		$link_text = $parsed_args['link_text'];
		$message .= "\n<a href='{$link_url}'>{$link_text}</a>";
	}

if ( isset( $parsed_args['back_link'] ) && $parsed_args['back_link'] ) {
		$back_text = $have_gettext ? __( '« Back' ) : '« Back';
		$message .= "\n<a href='javascript:history.back()'>$back_text</a>";
	}

if ( ! did_action( 'admin_head' ) ) :
		if ( ! headers_sent() ) {
			header( "Content-Type: text/html; charset={$parsed_args['charset']}" );
			status_header( $parsed_args['response'] );
			nocache_headers();
		}

$text_direction = $parsed_args['text_direction'];
		$dir_attr       = "dir='$text_direction'";

/*
		 * If `text_direction` was not explicitly passed,
		 * use get_language_attributes() if available.
		 */
		if ( empty( $args['text_direction'] )
			&& function_exists( 'language_attributes' ) && function_exists( 'is_rtl' )
		) {
			$dir_attr = get_language_attributes();
		}
		?>
<!DOCTYPE html>
<html <?php echo $dir_attr; ?>>
<head>
	<meta http-equiv="Content-Type" content="text/html; charset=<?php echo $parsed_args['charset']; ?>" />
	<meta name="viewport" content="width=device-width">
		<?php
		if ( function_exists( 'wp_robots' ) && function_exists( 'wp_robots_no_robots' ) && function_exists( 'add_filter' ) ) {
			add_filter( 'wp_robots', 'wp_robots_no_robots' );
			wp_robots();
		}
		?>
	<title><?php echo $title; ?></title>
	<style type="text/css">
		html {
			background: #f1f1f1;
		}
		body {
			background: #fff;
			border: 1px solid #ccd0d4;
			color: #444;
			font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
			margin: 2em auto;
			padding: 1em 2em;
			max-width: 700px;
			-webkit-box-shadow: 0 1px 1px rgba(0, 0, 0, .04);
			box-shadow: 0 1px 1px rgba(0, 0, 0, .04);
		}
		h1 {
			border-bottom: 1px solid #dadada;
			clear: both;
			color: #666;
			font-size: 24px;
			margin: 30px 0 0 0;
			padding: 0;
			padding-bottom: 7px;
		}
		#error-page {
			margin-top: 50px;
		}
		#error-page p,
		#error-page .wp-die-message {
			font-size: 14px;
			line-height: 1.5;
			margin: 25px 0 20px;
		}
		#error-page code {
			font-family: Consolas, Monaco, monospace;
		}
		ul li {
			margin-bottom: 10px;
			font-size: 14px ;
		}
		a {
			color: #2271b1;
		}
		a:hover,
		a:active {
			color: #135e96;
		}
		a:focus {
			color: #043959;
			box-shadow: 0 0 0 2px #2271b1;
			outline: 2px solid transparent;
		}
		.button {
			background: #f3f5f6;
			border: 1px solid #016087;
			color: #016087;
			display: inline-block;
			text-decoration: none;
			font-size: 13px;
			line-height: 2;
			height: 28px;
			margin: 0;
			padding: 0 10px 1px;
			cursor: pointer;
			-webkit-border-radius: 3px;
			-webkit-appearance: none;
			border-radius: 3px;
			white-space: nowrap;
			-webkit-box-sizing: border-box;
			-moz-box-sizing: border-box;
			box-sizing: border-box;

vertical-align: top;
		}

.button.button-large {
			line-height: 2.30769231;
			min-height: 32px;
			padding: 0 12px;
		}

.button:hover,
		.button:focus {
			background: #f1f1f1;
		}

.button:focus {
			background: #f3f5f6;
			border-color: #007cba;
			-webkit-box-shadow: 0 0 0 1px #007cba;
			box-shadow: 0 0 0 1px #007cba;
			color: #016087;
			outline: 2px solid transparent;
			outline-offset: 0;
		}

.button:active {
			background: #f3f5f6;
			border-color: #7e8993;
			-webkit-box-shadow: none;
			box-shadow: none;
		}

<?php
		if ( 'rtl' === $text_direction ) {
			echo 'body { font-family: Tahoma, Arial; }';
		}
		?>
	</style>
</head>
<body id="error-page">
<?php endif; // ! did_action( 'admin_head' ) ?>
	<?php echo $message; ?>
</body>
</html>
	<?php
	if ( $parsed_args['exit'] ) {
		die();
	}
}

/**
 * Kills WordPress execution and displays Ajax response with an error message.
 *
 * This is the handler for wp_die() when processing Ajax requests.
 *
 * @since 3.4.0
 * @access private
 *
 * @param string       $message Error message.
 * @param string       $title   Optional. Error title (unused). Default empty string.
 * @param string|array $args    Optional. Arguments to control behavior. Default empty array.
 */
function _ajax_wp_die_handler( $message, $title = '', $args = array() ) {
	// Set default 'response' to 200 for Ajax requests.
	$args = wp_parse_args(
		$args,
		array( 'response' => 200 )
	);

list( $message, $title, $parsed_args ) = _wp_die_process_input( $message, $title, $args );

if ( ! headers_sent() ) {
		// This is intentional. For backward-compatibility, support passing null here.
		if ( null !== $args['response'] ) {
			status_header( $parsed_args['response'] );
		}
		nocache_headers();
	}

if ( is_scalar( $message ) ) {
		$message = (string) $message;
	} else {
		$message = '0';
	}

if ( $parsed_args['exit'] ) {
		die( $message );
	}

echo $message;
}

/**
 * Kills WordPress execution and displays JSON response with an error message.
 *
 * This is the handler for wp_die() when processing JSON requests.
 *
 * @since 5.1.0
 * @access private
 *
 * @param string       $message Error message.
 * @param string       $title   Optional. Error title. Default empty string.
 * @param string|array $args    Optional. Arguments to control behavior. Default empty array.
 */
function _json_wp_die_handler( $message, $title = '', $args = array() ) {
	list( $message, $title, $parsed_args ) = _wp_die_process_input( $message, $title, $args );

$data = array(
		'code'              => $parsed_args['code'],
		'message'           => $message,
		'data'              => array(
			'status' => $parsed_args['response'],
		),
		'additional_errors' => $parsed_args['additional_errors'],
	);

if ( isset( $parsed_args['error_data'] ) ) {
		$data['data']['error'] = $parsed_args['error_data'];
	}

if ( ! headers_sent() ) {
		header( "Content-Type: application/json; charset={$parsed_args['charset']}" );
		if ( null !== $parsed_args['response'] ) {
			status_header( $parsed_args['response'] );
		}
		nocache_headers();
	}

echo wp_json_encode( $data );
	if ( $parsed_args['exit'] ) {
		die();
	}
}

/**
 * Kills WordPress execution and displays JSONP response with an error message.
 *
 * This is the handler for wp_die() when processing JSONP requests.
 *
 * @since 5.2.0
 * @access private
 *
 * @param string       $message Error message.
 * @param string       $title   Optional. Error title. Default empty string.
 * @param string|array $args    Optional. Arguments to control behavior. Default empty array.
 */
function _jsonp_wp_die_handler( $message, $title = '', $args = array() ) {
	list( $message, $title, $parsed_args ) = _wp_die_process_input( $message, $title, $args );

if ( isset( $parsed_args['error_data'] ) ) {
		$data['data']['error'] = $parsed_args['error_data'];
	}

if ( ! headers_sent() ) {
		header( "Content-Type: application/javascript; charset={$parsed_args['charset']}" );
		header( 'X-Content-Type-Options: nosniff' );
		header( 'X-Robots-Tag: noindex' );
		if ( null !== $parsed_args['response'] ) {
			status_header( $parsed_args['response'] );
		}
		nocache_headers();
	}

$result         = wp_json_encode( $data );
	$jsonp_callback = $_GET['_jsonp'];
	echo '/**/' . $jsonp_callback . '(' . $result . ')';
	if ( $parsed_args['exit'] ) {
		die();
	}
}

/**
 * Kills WordPress execution and displays XML response with an error message.
 *
 * This is the handler for wp_die() when processing XMLRPC requests.
 *
 * @since 3.2.0
 * @access private
 *
 * @global wp_xmlrpc_server $wp_xmlrpc_server
 *
 * @param string       $message Error message.
 * @param string       $title   Optional. Error title. Default empty string.
 * @param string|array $args    Optional. Arguments to control behavior. Default empty array.
 */
function _xmlrpc_wp_die_handler( $message, $title = '', $args = array() ) {
	global $wp_xmlrpc_server;

list( $message, $title, $parsed_args ) = _wp_die_process_input( $message, $title, $args );

if ( ! headers_sent() ) {
		nocache_headers();
	}

if ( $wp_xmlrpc_server ) {
		$error = new IXR_Error( $parsed_args['response'], $message );
		$wp_xmlrpc_server->output( $error->getXml() );
	}
	if ( $parsed_args['exit'] ) {
		die();
	}
}

/**
 * Kills WordPress execution and displays XML response with an error message.
 *
 * This is the handler for wp_die() when processing XML requests.
 *
 * @since 5.2.0
 * @access private
 *
 * @param string       $message Error message.
 * @param string       $title   Optional. Error title. Default empty string.
 * @param string|array $args    Optional. Arguments to control behavior. Default empty array.
 */
function _xml_wp_die_handler( $message, $title = '', $args = array() ) {
	list( $message, $title, $parsed_args ) = _wp_die_process_input( $message, $title, $args );

$message = htmlspecialchars( $message );
	$title   = htmlspecialchars( $title );

$xml = <<<EOD
<error>
 <code>{$parsed_args['code']}</code>
 <title><![CDATA[{$title}]]></title>
 <message><![CDATA[{$message}]]></message>
 <data>
 <status>{$parsed_args['response']}</status>
 </data>
</error>

EOD;

if ( ! headers_sent() ) {
		header( "Content-Type: text/xml; charset={$parsed_args['charset']}" );
		if ( null !== $parsed_args['response'] ) {
			status_header( $parsed_args['response'] );
		}
		nocache_headers();
	}

echo $xml;
	if ( $parsed_args['exit'] ) {
		die();
	}
}

/**
 * Kills WordPress execution and displays an error message.
 *
 * This is the handler for wp_die() when processing APP requests.
 *
 * @since 3.4.0
 * @since 5.1.0 Added the $title and $args parameters.
 * @access private
 *
 * @param string       $message Optional. Response to print. Default empty string.
 * @param string       $title   Optional. Error title (unused). Default empty string.
 * @param string|array $args    Optional. Arguments to control behavior. Default empty array.
 */
function _scalar_wp_die_handler( $message = '', $title = '', $args = array() ) {
	list( $message, $title, $parsed_args ) = _wp_die_process_input( $message, $title, $args );

if ( $parsed_args['exit'] ) {
		if ( is_scalar( $message ) ) {
			die( (string) $message );
		}
		die();
	}

if ( is_scalar( $message ) ) {
		echo (string) $message;
	}
}

/**
 * Processes arguments passed to wp_die() consistently for its handlers.
 *
 * @since 5.1.0
 * @access private
 *
 * @param string|WP_Error $message Error message or WP_Error object.
 * @param string          $title   Optional. Error title. Default empty string.
 * @param string|array    $args    Optional. Arguments to control behavior. Default empty array.
 * @return array {
 *     Processed arguments.
 *
 *     @type string $0 Error message.
 *     @type string $1 Error title.
 *     @type array  $2 Arguments to control behavior.
 * }
 */
function _wp_die_process_input( $message, $title = '', $args = array() ) {
	$defaults = array(
		'response'          => 0,
		'code'              => '',
		'exit'              => true,
		'back_link'         => false,
		'link_url'          => '',
		'link_text'         => '',
		'text_direction'    => '',
		'charset'           => 'utf-8',
		'additional_errors' => array(),
	);

$args = wp_parse_args( $args, $defaults );

if ( function_exists( 'is_wp_error' ) && is_wp_error( $message ) ) {
		if ( ! empty( $message->errors ) ) {
			$errors = array();
			foreach ( (array) $message->errors as $error_code => $error_messages ) {
				foreach ( (array) $error_messages as $error_message ) {
					$errors[] = array(
						'code'    => $error_code,
						'message' => $error_message,
						'data'    => $message->get_error_data( $error_code ),
					);
				}
			}

$message = $errors[0]['message'];
			if ( empty( $args['code'] ) ) {
				$args['code'] = $errors[0]['code'];
			}
			if ( empty( $args['response'] ) && is_array( $errors[0]['data'] ) && ! empty( $errors[0]['data']['status'] ) ) {
				$args['response'] = $errors[0]['data']['status'];
			}
			if ( empty( $title ) && is_array( $errors[0]['data'] ) && ! empty( $errors[0]['data']['title'] ) ) {
				$title = $errors[0]['data']['title'];
			}
			if ( WP_DEBUG_DISPLAY && is_array( $errors[0]['data'] ) && ! empty( $errors[0]['data']['error'] ) ) {
				$args['error_data'] = $errors[0]['data']['error'];
			}

unset( $errors[0] );
			$args['additional_errors'] = array_values( $errors );
		} else {
			$message = '';
		}
	}

$have_gettext = function_exists( '__' );

// The $title and these specific $args must always have a non-empty value.
	if ( empty( $args['code'] ) ) {
		$args['code'] = 'wp_die';
	}
	if ( empty( $args['response'] ) ) {
		$args['response'] = 500;
	}
	if ( empty( $title ) ) {
		$title = $have_gettext ? __( 'WordPress › Error' ) : 'WordPress › Error';
	}
	if ( empty( $args['text_direction'] ) || ! in_array( $args['text_direction'], array( 'ltr', 'rtl' ), true ) ) {
		$args['text_direction'] = 'ltr';
		if ( function_exists( 'is_rtl' ) && is_rtl() ) {
			$args['text_direction'] = 'rtl';
		}
	}

if ( ! empty( $args['charset'] ) ) {
		$args['charset'] = _canonical_charset( $args['charset'] );
	}

return array( $message, $title, $args );
}

/**
 * Encodes a variable into JSON, with some confidence checks.
 *
 * @since 4.1.0
 * @since 5.3.0 No longer handles support for PHP < 5.6.
 * @since 6.5.0 The `$data` parameter has been renamed to `$value` and
 * the `$options` parameter to `$flags` for parity with PHP.
 *
 * @param mixed $value Variable (usually an array or object) to encode as JSON.
 * @param int $flags Optional. Options to be passed to json_encode(). Default 0.
 * @param int $depth Optional. Maximum depth to walk through $value. Must be
 * greater than 0. Default 512.
 * @return string|false The JSON encoded string, or false if it cannot be encoded.
 */
function wp_json_encode( $value, $flags = 0, $depth = 512 ) {
	$json = json_encode( $value, $flags, $depth );

// If json_encode() was successful, no need to do more confidence checking.
	if ( false !== $json ) {
		return $json;
	}

try {
		$value = _wp_json_sanity_check( $value, $depth );
	} catch ( Exception $e ) {
		return false;
	}

return json_encode( $value, $flags, $depth );
}

/**
 * Performs confidence checks on data that shall be encoded to JSON.
 *
 * @ignore
 * @since 4.1.0
 * @access private
 *
 * @see wp_json_encode()
 *
 * @throws Exception If depth limit is reached.
 *
 * @param mixed $value Variable (usually an array or object) to encode as JSON.
 * @param int $depth Maximum depth to walk through $value. Must be greater than 0.
 * @return mixed The sanitized data that shall be encoded to JSON.
 */
function _wp_json_sanity_check( $value, $depth ) {
	if ( $depth < 0 ) {
		throw new Exception( 'Reached depth limit' );
	}

if ( is_array( $value ) ) {
		$output = array();
		foreach ( $value as $id => $el ) {
			// Don't forget to sanitize the ID!
			if ( is_string( $id ) ) {
				$clean_id = _wp_json_convert_string( $id );
			} else {
				$clean_id = $id;
			}

// Check the element type, so that we're only recursing if we really have to.
			if ( is_array( $el ) || is_object( $el ) ) {
				$output[ $clean_id ] = _wp_json_sanity_check( $el, $depth - 1 );
			} elseif ( is_string( $el ) ) {
				$output[ $clean_id ] = _wp_json_convert_string( $el );
			} else {
				$output[ $clean_id ] = $el;
			}
		}
	} elseif ( is_object( $value ) ) {
		$output = new stdClass();
		foreach ( $value as $id => $el ) {
			if ( is_string( $id ) ) {
				$clean_id = _wp_json_convert_string( $id );
			} else {
				$clean_id = $id;
			}

if ( is_array( $el ) || is_object( $el ) ) {
				$output->$clean_id = _wp_json_sanity_check( $el, $depth - 1 );
			} elseif ( is_string( $el ) ) {
				$output->$clean_id = _wp_json_convert_string( $el );
			} else {
				$output->$clean_id = $el;
			}
		}
	} elseif ( is_string( $value ) ) {
		return _wp_json_convert_string( $value );
	} else {
		return $value;
	}

return $output;
}

/**
 * Converts a string to UTF-8, so that it can be safely encoded to JSON.
 *
 * @ignore
 * @since 4.1.0
 * @access private
 *
 * @see _wp_json_sanity_check()
 *
 * @param string $input_string The string which is to be converted.
 * @return string The checked string.
 */
function _wp_json_convert_string( $input_string ) {
	static $use_mb = null;
	if ( is_null( $use_mb ) ) {
		$use_mb = function_exists( 'mb_convert_encoding' );
	}

if ( $use_mb ) {
		$encoding = mb_detect_encoding( $input_string, mb_detect_order(), true );
		if ( $encoding ) {
			return mb_convert_encoding( $input_string, 'UTF-8', $encoding );
		} else {
			return mb_convert_encoding( $input_string, 'UTF-8', 'UTF-8' );
		}
	} else {
		return wp_check_invalid_utf8( $input_string, true );
	}
}

/**
 * Prepares response data to be serialized to JSON.
 *
 * This supports the JsonSerializable interface for PHP 5.2-5.3 as well.
 *
 * @ignore
 * @since 4.4.0
 * @deprecated 5.3.0 This function is no longer needed as support for PHP 5.2-5.3
 *                   has been dropped.
 * @access private
 *
 * @param mixed $value Native representation.
 * @return bool|int|float|null|string|array Data ready for `json_encode()`.
 */
function _wp_json_prepare_data( $value ) {
	_deprecated_function( __FUNCTION__, '5.3.0' );
	return $value;
}

/**
 * Sends a JSON response back to an Ajax request.
 *
 * @since 3.5.0
 * @since 4.7.0 The `$status_code` parameter was added.
 * @since 5.6.0 The `$flags` parameter was added.
 *
 * @param mixed $response    Variable (usually an array or object) to encode as JSON,
 *                           then print and die.
 * @param int   $status_code Optional. The HTTP status code to output. Default null.
 * @param int   $flags       Optional. Options to be passed to json_encode(). Default 0.
 */
function wp_send_json( $response, $status_code = null, $flags = 0 ) {
	if ( wp_is_serving_rest_request() ) {
		_doing_it_wrong(
			__FUNCTION__,
			sprintf(
				/* translators: 1: WP_REST_Response, 2: WP_Error */
				__( 'Return a %1$s or %2$s object from your callback when using the REST API.' ),
				'WP_REST_Response',
				'WP_Error'
			),
			'5.5.0'
		);
	}

if ( ! headers_sent() ) {
		header( 'Content-Type: application/json; charset=' . get_option( 'blog_charset' ) );
		if ( null !== $status_code ) {
			status_header( $status_code );
		}
	}

echo wp_json_encode( $response, $flags );

if ( wp_doing_ajax() ) {
		wp_die(
			'',
			'',
			array(
				'response' => null,
			)
		);
	} else {
		die;
	}
}

/**
 * Sends a JSON response back to an Ajax request, indicating success.
 *
 * @since 3.5.0
 * @since 4.7.0 The `$status_code` parameter was added.
 * @since 5.6.0 The `$flags` parameter was added.
 *
 * @param mixed $value       Optional. Data to encode as JSON, then print and die. Default null.
 * @param int   $status_code Optional. The HTTP status code to output. Default null.
 * @param int   $flags       Optional. Options to be passed to json_encode(). Default 0.
 */
function wp_send_json_success( $value = null, $status_code = null, $flags = 0 ) {
	$response = array( 'success' => true );

if ( isset( $value ) ) {
		$response['data'] = $value;
	}

wp_send_json( $response, $status_code, $flags );
}

/**
 * Sends a JSON response back to an Ajax request, indicating failure.
 *
 * If the `$value` parameter is a WP_Error object, the errors
 * within the object are processed and output as an array of error
 * codes and corresponding messages. All other types are output
 * without further processing.
 *
 * @since 3.5.0
 * @since 4.1.0 The `$value` parameter is now processed if a WP_Error object is passed in.
 * @since 4.7.0 The `$status_code` parameter was added.
 * @since 5.6.0 The `$flags` parameter was added.
 *
 * @param mixed $value       Optional. Data to encode as JSON, then print and die. Default null.
 * @param int   $status_code Optional. The HTTP status code to output. Default null.
 * @param int   $flags       Optional. Options to be passed to json_encode(). Default 0.
 */
function wp_send_json_error( $value = null, $status_code = null, $flags = 0 ) {
	$response = array( 'success' => false );

if ( isset( $value ) ) {
		if ( is_wp_error( $value ) ) {
			$result = array();
			foreach ( $value->errors as $code => $messages ) {
				foreach ( $messages as $message ) {
					$result[] = array(
						'code'    => $code,
						'message' => $message,
					);
				}
			}

$response['data'] = $result;
		} else {
			$response['data'] = $value;
		}
	}

wp_send_json( $response, $status_code, $flags );
}

/**
 * Checks that a JSONP callback is a valid JavaScript callback name.
 *
 * Only allows alphanumeric characters and the dot character in callback
 * function names. This helps to mitigate XSS attacks caused by directly
 * outputting user input.
 *
 * @since 4.6.0
 *
 * @param string $callback Supplied JSONP callback function name.
 * @return bool Whether the callback function name is valid.
 */
function wp_check_jsonp_callback( $callback ) {
	if ( ! is_string( $callback ) ) {
		return false;
	}

preg_replace( '/[^\w\.]/', '', $callback, -1, $illegal_char_count );

return 0 === $illegal_char_count;
}

/**
 * Reads and decodes a JSON file.
 *
 * @since 5.9.0
 *
 * @param string $filename Path to the JSON file.
 * @param array  $options  {
 *     Optional. Options to be used with `json_decode()`.
 *
 *     @type bool $associative Optional. When `true`, JSON objects will be returned as associative arrays.
 *                             When `false`, JSON objects will be returned as objects. Default false.
 * }
 *
 * @return mixed Returns the value encoded in JSON in appropriate PHP type.
 *               `null` is returned if the file is not found, or its content can't be decoded.
 */
function wp_json_file_decode( $filename, $options = array() ) {
	$result   = null;
	$filename = wp_normalize_path( realpath( $filename ) );

if ( ! $filename ) {
		trigger_error(
			sprintf(
				/* translators: %s: Path to the JSON file. */
				__( "File %s doesn't exist!" ),
				$filename
			)
		);
		return $result;
	}

$options      = wp_parse_args( $options, array( 'associative' => false ) );
	$decoded_file = json_decode( file_get_contents( $filename ), $options['associative'] );

if ( JSON_ERROR_NONE !== json_last_error() ) {
		trigger_error(
			sprintf(
				/* translators: 1: Path to the JSON file, 2: Error message. */
				__( 'Error when decoding a JSON file at path %1$s: %2$s' ),
				$filename,
				json_last_error_msg()
			)
		);
		return $result;
	}

return $decoded_file;
}

/**
 * Retrieves the WordPress home page URL.
 *
 * If the constant named 'WP_HOME' exists, then it will be used and returned
 * by the function. This can be used to counter the redirection on your local
 * development environment.
 *
 * @since 2.2.0
 * @access private
 *
 * @see WP_HOME
 *
 * @param string $url URL for the home location.
 * @return string Homepage location.
 */
function _config_wp_home( $url = '' ) {
	if ( defined( 'WP_HOME' ) ) {
		return untrailingslashit( WP_HOME );
	}
	return $url;
}

/**
 * Retrieves the WordPress site URL.
 *
 * If the constant named 'WP_SITEURL' is defined, then the value in that
 * constant will always be returned. This can be used for debugging a site
 * on your localhost while not having to change the database to your URL.
 *
 * @since 2.2.0
 * @access private
 *
 * @see WP_SITEURL
 *
 * @param string $url URL to set the WordPress site location.
 * @return string The WordPress site URL.
 */
function _config_wp_siteurl( $url = '' ) {
	if ( defined( 'WP_SITEURL' ) ) {
		return untrailingslashit( WP_SITEURL );
	}
	return $url;
}

/**
 * Deletes the fresh site option.
 *
 * @since 4.7.0
 * @access private
 */
function _delete_option_fresh_site() {
	update_option( 'fresh_site', '0' );
}

/**
 * Sets the localized direction for MCE plugin.
 *
 * Will only set the direction to 'rtl', if the WordPress locale has
 * the text direction set to 'rtl'.
 *
 * Fills in the 'directionality' setting, enables the 'directionality'
 * plugin, and adds the 'ltr' button to 'toolbar1', formerly
 * 'theme_advanced_buttons1' array keys. These keys are then returned
 * in the $mce_init (TinyMCE settings) array.
 *
 * @since 2.1.0
 * @access private
 *
 * @param array $mce_init MCE settings array.
 * @return array Direction set for 'rtl', if needed by locale.
 */
function _mce_set_direction( $mce_init ) {
	if ( is_rtl() ) {
		$mce_init['directionality'] = 'rtl';
		$mce_init['rtl_ui']         = true;

if ( ! empty( $mce_init['plugins'] ) && ! str_contains( $mce_init['plugins'], 'directionality' ) ) {
			$mce_init['plugins'] .= ',directionality';
		}

if ( ! empty( $mce_init['toolbar1'] ) && ! preg_match( '/\bltr\b/', $mce_init['toolbar1'] ) ) {
			$mce_init['toolbar1'] .= ',ltr';
		}
	}

return $mce_init;
}

/**
 * Determines whether WordPress is currently serving a REST API request.
 *
 * The function relies on the 'REST_REQUEST' global. As such, it only returns true when an actual REST _request_ is
 * being made. It does not return true when a REST endpoint is hit as part of another request, e.g. for preloading a
 * REST response. See {@see wp_is_rest_endpoint()} for that purpose.
 *
 * This function should not be called until the {@see 'parse_request'} action, as the constant is only defined then,
 * even for an actual REST request.
 *
 * @since 6.5.0
 *
 * @return bool True if it's a WordPress REST API request, false otherwise.
 */
function wp_is_serving_rest_request() {
	return defined( 'REST_REQUEST' ) && REST_REQUEST;
}

/**
 * Converts smiley code to the icon graphic file equivalent.
 *
 * You can turn off smilies, by going to the write setting screen and unchecking
 * the box, or by setting 'use_smilies' option to false or removing the option.
 *
 * Plugins may override the default smiley list by setting the $wpsmiliestrans
 * to an array, with the key the code the blogger types in and the value the
 * image file.
 *
 * The $wp_smiliessearch global is for the regular expression and is set each
 * time the function is called.
 *
 * The full list of smilies can be found in the function and won't be listed in
 * the description. Probably should create a Codex page for it, so that it is
 * available.
 *
 * @global array $wpsmiliestrans
 * @global array $wp_smiliessearch
 *
 * @since 2.2.0
 */
function smilies_init() {
	global $wpsmiliestrans, $wp_smiliessearch;

// Don't bother setting up smilies if they are disabled.
	if ( ! get_option( 'use_smilies' ) ) {
		return;
	}

if ( ! isset( $wpsmiliestrans ) ) {
		$wpsmiliestrans = array(
			':mrgreen:' => 'mrgreen.png',
			':neutral:' => "\xf0\x9f\x98\x90",
			':twisted:' => "\xf0\x9f\x98\x88",
			':arrow:'   => "\xe2\x9e\xa1",
			':shock:'   => "\xf0\x9f\x98\xaf",
			':smile:'   => "\xf0\x9f\x99\x82",
			':???:'     => "\xf0\x9f\x98\x95",
			':cool:'    => "\xf0\x9f\x98\x8e",
			':evil:'    => "\xf0\x9f\x91\xbf",
			':grin:'    => "\xf0\x9f\x98\x80",
			':idea:'    => "\xf0\x9f\x92\xa1",
			':oops:'    => "\xf0\x9f\x98\xb3",
			':razz:'    => "\xf0\x9f\x98\x9b",
			':roll:'    => "\xf0\x9f\x99\x84",
			':wink:'    => "\xf0\x9f\x98\x89",
			':cry:'     => "\xf0\x9f\x98\xa5",
			':eek:'     => "\xf0\x9f\x98\xae",
			':lol:'     => "\xf0\x9f\x98\x86",
			':mad:'     => "\xf0\x9f\x98\xa1",
			':sad:'     => "\xf0\x9f\x99\x81",
			'8-)'       => "\xf0\x9f\x98\x8e",
			'8-O'       => "\xf0\x9f\x98\xaf",
			':-('       => "\xf0\x9f\x99\x81",
			':-)'       => "\xf0\x9f\x99\x82",
			':-?'       => "\xf0\x9f\x98\x95",
			':-D'       => "\xf0\x9f\x98\x80",
			':-P'       => "\xf0\x9f\x98\x9b",
			':-o'       => "\xf0\x9f\x98\xae",
			':-x'       => "\xf0\x9f\x98\xa1",
			':-|'       => "\xf0\x9f\x98\x90",
			';-)'       => "\xf0\x9f\x98\x89",
			// This one transformation breaks regular text with frequency.
			//     '8)' => "\xf0\x9f\x98\x8e",
			'8O'        => "\xf0\x9f\x98\xaf",
			':('        => "\xf0\x9f\x99\x81",
			':)'        => "\xf0\x9f\x99\x82",
			':?'        => "\xf0\x9f\x98\x95",
			':D'        => "\xf0\x9f\x98\x80",
			':P'        => "\xf0\x9f\x98\x9b",
			':o'        => "\xf0\x9f\x98\xae",
			':x'        => "\xf0\x9f\x98\xa1",
			':|'        => "\xf0\x9f\x98\x90",
			';)'        => "\xf0\x9f\x98\x89",
			':!:'       => "\xe2\x9d\x97",
			':?:'       => "\xe2\x9d\x93",
		);
	}

/**
	 * Filters all the smilies.
	 *
	 * This filter must be added before `smilies_init` is run, as
	 * it is normally only run once to setup the smilies regex.
	 *
	 * @since 4.7.0
	 *
	 * @param string[] $wpsmiliestrans List of the smilies' hexadecimal representations, keyed by their smily code.
	 */
	$wpsmiliestrans = apply_filters( 'smilies', $wpsmiliestrans );

if ( count( $wpsmiliestrans ) === 0 ) {
		return;
	}

/*
	 * NOTE: we sort the smilies in reverse key order. This is to make sure
	 * we match the longest possible smilie (:???: vs :?) as the regular
	 * expression used below is first-match
	 */
	krsort( $wpsmiliestrans );

$spaces = wp_spaces_regexp();

// Begin first "subpattern".
	$wp_smiliessearch = '/(?<=' . $spaces . '|^)';

$subchar = '';
	foreach ( (array) $wpsmiliestrans as $smiley => $img ) {
		$firstchar = substr( $smiley, 0, 1 );
		$rest      = substr( $smiley, 1 );

// New subpattern?
		if ( $firstchar !== $subchar ) {
			if ( '' !== $subchar ) {
				$wp_smiliessearch .= ')(?=' . $spaces . '|$)'; // End previous "subpattern".
				$wp_smiliessearch .= '|(?<=' . $spaces . '|^)'; // Begin another "subpattern".
			}

$subchar           = $firstchar;
			$wp_smiliessearch .= preg_quote( $firstchar, '/' ) . '(?:';
		} else {
			$wp_smiliessearch .= '|';
		}

$wp_smiliessearch .= preg_quote( $rest, '/' );
	}

$wp_smiliessearch .= ')(?=' . $spaces . '|$)/m';
}

/**
 * Merges user defined arguments into defaults array.
 *
 * This function is used throughout WordPress to allow for both string or array
 * to be merged into another array.
 *
 * @since 2.2.0
 * @since 2.3.0 `$args` can now also be an object.
 *
 * @param string|array|object $args     Value to merge with $defaults.
 * @param array               $defaults Optional. Array that serves as the defaults.
 *                                      Default empty array.
 * @return array Merged user defined values with defaults.
 */
function wp_parse_args( $args, $defaults = array() ) {
	if ( is_object( $args ) ) {
		$parsed_args = get_object_vars( $args );
	} elseif ( is_array( $args ) ) {
		$parsed_args =& $args;
	} else {
		wp_parse_str( $args, $parsed_args );
	}

if ( is_array( $defaults ) && $defaults ) {
		return array_merge( $defaults, $parsed_args );
	}
	return $parsed_args;
}

/**
 * Converts a comma- or space-separated list of scalar values to an array.
 *
 * @since 5.1.0
 *
 * @param array|string $input_list List of values.
 * @return array Array of values.
 */
function wp_parse_list( $input_list ) {
	if ( ! is_array( $input_list ) ) {
		return preg_split( '/[\s,]+/', $input_list, -1, PREG_SPLIT_NO_EMPTY );
	}

// Validate all entries of the list are scalar.
	$input_list = array_filter( $input_list, 'is_scalar' );

return $input_list;
}

/**
 * Cleans up an array, comma- or space-separated list of IDs.
 *
 * @since 3.0.0
 * @since 5.1.0 Refactored to use wp_parse_list().
 *
 * @param array|string $input_list List of IDs.
 * @return int[] Sanitized array of IDs.
 */
function wp_parse_id_list( $input_list ) {
	$input_list = wp_parse_list( $input_list );

return array_unique( array_map( 'absint', $input_list ) );
}

/**
 * Cleans up an array, comma- or space-separated list of slugs.
 *
 * @since 4.7.0
 * @since 5.1.0 Refactored to use wp_parse_list().
 *
 * @param array|string $input_list List of slugs.
 * @return string[] Sanitized array of slugs.
 */
function wp_parse_slug_list( $input_list ) {
	$input_list = wp_parse_list( $input_list );

return array_unique( array_map( 'sanitize_title', $input_list ) );
}

/**
 * Extracts a slice of an array, given a list of keys.
 *
 * @since 3.1.0
 *
 * @param array $input_array The original array.
 * @param array $keys        The list of keys.
 * @return array The array slice.
 */
function wp_array_slice_assoc( $input_array, $keys ) {
	$slice = array();

foreach ( $keys as $key ) {
		if ( isset( $input_array[ $key ] ) ) {
			$slice[ $key ] = $input_array[ $key ];
		}
	}

return $slice;
}

/**
 * Sorts the keys of an array alphabetically.
 *
 * The array is passed by reference so it doesn't get returned
 * which mimics the behavior of `ksort()`.
 *
 * @since 6.0.0
 *
 * @param array $input_array The array to sort, passed by reference.
 */
function wp_recursive_ksort( &$input_array ) {
	foreach ( $input_array as &$value ) {
		if ( is_array( $value ) ) {
			wp_recursive_ksort( $value );
		}
	}

ksort( $input_array );
}

/**
 * Accesses an array in depth based on a path of keys.
 *
 * It is the PHP equivalent of JavaScript's `lodash.get()` and mirroring it may help other components
 * retain some symmetry between client and server implementations.
 *
 * Example usage:
 *
 *     $input_array = array(
 *         'a' => array(
 *             'b' => array(
 *                 'c' => 1,
 *             ),
 *         ),
 *     );
 *     _wp_array_get( $input_array, array( 'a', 'b', 'c' ) );
 *
 * @internal
 *
 * @since 5.6.0
 * @access private
 *
 * @param array $input_array   An array from which we want to retrieve some information.
 * @param array $path          An array of keys describing the path with which to retrieve information.
 * @param mixed $default_value Optional. The return value if the path does not exist within the array,
 *                             or if `$input_array` or `$path` are not arrays. Default null.
 * @return mixed The value from the path specified.
 */
function _wp_array_get( $input_array, $path, $default_value = null ) {
	// Confirm $path is valid.
	if ( ! is_array( $path ) || 0 === count( $path ) ) {
		return $default_value;
	}

foreach ( $path as $path_element ) {
		if ( ! is_array( $input_array ) ) {
			return $default_value;
		}

if ( is_string( $path_element )
			|| is_integer( $path_element )
			|| null === $path_element
		) {
			/*
			 * Check if the path element exists in the input array.
			 * We check with `isset()` first, as it is a lot faster
			 * than `array_key_exists()`.
			 */
			if ( isset( $input_array[ $path_element ] ) ) {
				$input_array = $input_array[ $path_element ];
				continue;
			}

/*
			 * If `isset()` returns false, we check with `array_key_exists()`,
			 * which also checks for `null` values.
			 */
			if ( array_key_exists( $path_element, $input_array ) ) {
				$input_array = $input_array[ $path_element ];
				continue;
			}
		}

return $default_value;
	}

return $input_array;
}

/**
 * Sets an array in depth based on a path of keys.
 *
 * It is the PHP equivalent of JavaScript's `lodash.set()` and mirroring it may help other components
 * retain some symmetry between client and server implementations.
 *
 * Example usage:
 *
 *     $input_array = array();
 *     _wp_array_set( $input_array, array( 'a', 'b', 'c', 1 ) );
 *
 *     $input_array becomes:
 *     array(
 *         'a' => array(
 *             'b' => array(
 *                 'c' => 1,
 *             ),
 *         ),
 *     );
 *
 * @internal
 *
 * @since 5.8.0
 * @access private
 *
 * @param array $input_array An array that we want to mutate to include a specific value in a path.
 * @param array $path        An array of keys describing the path that we want to mutate.
 * @param mixed $value       The value that will be set.
 */
function _wp_array_set( &$input_array, $path, $value = null ) {
	// Confirm $input_array is valid.
	if ( ! is_array( $input_array ) ) {
		return;
	}

// Confirm $path is valid.
	if ( ! is_array( $path ) ) {
		return;
	}

$path_length = count( $path );

if ( 0 === $path_length ) {
		return;
	}

foreach ( $path as $path_element ) {
		if (
			! is_string( $path_element ) && ! is_integer( $path_element ) &&
			! is_null( $path_element )
		) {
			return;
		}
	}

for ( $i = 0; $i < $path_length - 1; ++$i ) {
		$path_element = $path[ $i ];
		if (
			! array_key_exists( $path_element, $input_array ) ||
			! is_array( $input_array[ $path_element ] )
		) {
			$input_array[ $path_element ] = array();
		}
		$input_array = &$input_array[ $path_element ];
	}

$input_array[ $path[ $i ] ] = $value;
}

/**
 * This function is trying to replicate what
 * lodash's kebabCase (JS library) does in the client.
 *
 * The reason we need this function is that we do some processing
 * in both the client and the server (e.g.: we generate
 * preset classes from preset slugs) that needs to
 * create the same output.
 *
 * We can't remove or update the client's library due to backward compatibility
 * (some of the output of lodash's kebabCase is saved in the post content).
 * We have to make the server behave like the client.
 *
 * Changes to this function should follow updates in the client
 * with the same logic.
 *
 * @link https://github.com/lodash/lodash/blob/4.17/dist/lodash.js#L14369
 * @link https://github.com/lodash/lodash/blob/4.17/dist/lodash.js#L278
 * @link https://github.com/lodash-php/lodash-php/blob/master/src/String/kebabCase.php
 * @link https://github.com/lodash-php/lodash-php/blob/master/src/internal/unicodeWords.php
 *
 * @param string $input_string The string to kebab-case.
 *
 * @return string kebab-cased-string.
 */
function _wp_to_kebab_case( $input_string ) {
	// Ignore the camelCase names for variables so the names are the same as lodash so comparing and porting new changes is easier.
	// phpcs:disable WordPress.NamingConventions.ValidVariableName.VariableNotSnakeCase

/*
	 * Some notable things we've removed compared to the lodash version are:
	 *
	 * - non-alphanumeric characters: rsAstralRange, rsEmoji, etc
	 * - the groups that processed the apostrophe, as it's removed before passing the string to preg_match: rsApos, rsOptContrLower, and rsOptContrUpper
	 *
	 */

/** Used to compose unicode character classes. */
	$rsLowerRange       = 'a-z\\xdf-\\xf6\\xf8-\\xff';
	$rsNonCharRange     = '\\x00-\\x2f\\x3a-\\x40\\x5b-\\x60\\x7b-\\xbf';
	$rsPunctuationRange = '\\x{2000}-\\x{206f}';
	$rsSpaceRange       = ' \\t\\x0b\\f\\xa0\\x{feff}\\n\\r\\x{2028}\\x{2029}\\x{1680}\\x{180e}\\x{2000}\\x{2001}\\x{2002}\\x{2003}\\x{2004}\\x{2005}\\x{2006}\\x{2007}\\x{2008}\\x{2009}\\x{200a}\\x{202f}\\x{205f}\\x{3000}';
	$rsUpperRange       = 'A-Z\\xc0-\\xd6\\xd8-\\xde';
	$rsBreakRange       = $rsNonCharRange . $rsPunctuationRange . $rsSpaceRange;

/** Used to compose unicode capture groups. */
	$rsBreak  = '[' . $rsBreakRange . ']';
	$rsDigits = '\\d+'; // The last lodash version in GitHub uses a single digit here and expands it when in use.
	$rsLower  = '[' . $rsLowerRange . ']';
	$rsMisc   = '[^' . $rsBreakRange . $rsDigits . $rsLowerRange . $rsUpperRange . ']';
	$rsUpper  = '[' . $rsUpperRange . ']';

/** Used to compose unicode regexes. */
	$rsMiscLower = '(?:' . $rsLower . '|' . $rsMisc . ')';
	$rsMiscUpper = '(?:' . $rsUpper . '|' . $rsMisc . ')';
	$rsOrdLower  = '\\d*(?:1st|2nd|3rd|(?![123])\\dth)(?=\\b|[A-Z_])';
	$rsOrdUpper  = '\\d*(?:1ST|2ND|3RD|(?![123])\\dTH)(?=\\b|[a-z_])';

$regexp = '/' . implode(
		'|',
		array(
			$rsUpper . '?' . $rsLower . '+' . '(?=' . implode( '|', array( $rsBreak, $rsUpper, '$' ) ) . ')',
			$rsMiscUpper . '+' . '(?=' . implode( '|', array( $rsBreak, $rsUpper . $rsMiscLower, '$' ) ) . ')',
			$rsUpper . '?' . $rsMiscLower . '+',
			$rsUpper . '+',
			$rsOrdUpper,
			$rsOrdLower,
			$rsDigits,
		)
	) . '/u';

preg_match_all( $regexp, str_replace( "'", '', $input_string ), $matches );
	return strtolower( implode( '-', $matches[0] ) );
	// phpcs:enable WordPress.NamingConventions.ValidVariableName.VariableNotSnakeCase
}

/**
 * Determines if the variable is a numeric-indexed array.
 *
 * @since 4.4.0
 *
 * @param mixed $data Variable to check.
 * @return bool Whether the variable is a list.
 */
function wp_is_numeric_array( $data ) {
	if ( ! is_array( $data ) ) {
		return false;
	}

$keys        = array_keys( $data );
	$string_keys = array_filter( $keys, 'is_string' );

return count( $string_keys ) === 0;
}

/**
 * Filters a list of objects, based on a set of key => value arguments.
 *
 * Retrieves the objects from the list that match the given arguments.
 * Key represents property name, and value represents property value.
 *
 * If an object has more properties than those specified in arguments,
 * that will not disqualify it. When using the 'AND' operator,
 * any missing properties will disqualify it.
 *
 * When using the `$field` argument, this function can also retrieve
 * a particular field from all matching objects, whereas wp_list_filter()
 * only does the filtering.
 *
 * @since 3.0.0
 * @since 4.7.0 Uses `WP_List_Util` class.
 *
 * @param array       $input_list An array of objects to filter.
 * @param array       $args       Optional. An array of key => value arguments to match
 *                                against each object. Default empty array.
 * @param string      $operator   Optional. The logical operation to perform. 'AND' means
 *                                all elements from the array must match. 'OR' means only
 *                                one element needs to match. 'NOT' means no elements may
 *                                match. Default 'AND'.
 * @param bool|string $field      Optional. A field from the object to place instead
 *                                of the entire object. Default false.
 * @return array A list of objects or object fields.
 */
function wp_filter_object_list( $input_list, $args = array(), $operator = 'and', $field = false ) {
	if ( ! is_array( $input_list ) ) {
		return array();
	}

$util = new WP_List_Util( $input_list );

$util->filter( $args, $operator );

if ( $field ) {
		$util->pluck( $field );
	}

return $util->get_output();
}

/**
 * Filters a list of objects, based on a set of key => value arguments.
 *
 * Retrieves the objects from the list that match the given arguments.
 * Key represents property name, and value represents property value.
 *
 * If an object has more properties than those specified in arguments,
 * that will not disqualify it. When using the 'AND' operator,
 * any missing properties will disqualify it.
 *
 * If you want to retrieve a particular field from all matching objects,
 * use wp_filter_object_list() instead.
 *
 * @since 3.1.0
 * @since 4.7.0 Uses `WP_List_Util` class.
 * @since 5.9.0 Converted into a wrapper for `wp_filter_object_list()`.
 *
 * @param array  $input_list An array of objects to filter.
 * @param array  $args       Optional. An array of key => value arguments to match
 *                           against each object. Default empty array.
 * @param string $operator   Optional. The logical operation to perform. 'AND' means
 *                           all elements from the array must match. 'OR' means only
 *                           one element needs to match. 'NOT' means no elements may
 *                           match. Default 'AND'.
 * @return array Array of found values.
 */
function wp_list_filter( $input_list, $args = array(), $operator = 'AND' ) {
	return wp_filter_object_list( $input_list, $args, $operator );
}

/**
 * Plucks a certain field out of each object or array in an array.
 *
 * This has the same functionality and prototype of
 * array_column() (PHP 5.5) but also supports objects.
 *
 * @since 3.1.0
 * @since 4.0.0 $index_key parameter added.
 * @since 4.7.0 Uses `WP_List_Util` class.
 *
 * @param array      $input_list List of objects or arrays.
 * @param int|string $field      Field from the object to place instead of the entire object.
 * @param int|string $index_key  Optional. Field from the object to use as keys for the new array.
 *                               Default null.
 * @return array Array of found values. If `$index_key` is set, an array of found values with keys
 *               corresponding to `$index_key`. If `$index_key` is null, array keys from the original
 *               `$input_list` will be preserved in the results.
 */
function wp_list_pluck( $input_list, $field, $index_key = null ) {
	if ( ! is_array( $input_list ) ) {
		return array();
	}

$util = new WP_List_Util( $input_list );

return $util->pluck( $field, $index_key );
}

/**
 * Sorts an array of objects or arrays based on one or more orderby arguments.
 *
 * @since 4.7.0
 *
 * @param array        $input_list    An array of objects or arrays to sort.
 * @param string|array $orderby       Optional. Either the field name to order by or an array
 *                                    of multiple orderby fields as `$orderby => $order`.
 *                                    Default empty array.
 * @param string       $order         Optional. Either 'ASC' or 'DESC'. Only used if `$orderby`
 *                                    is a string. Default 'ASC'.
 * @param bool         $preserve_keys Optional. Whether to preserve keys. Default false.
 * @return array The sorted array.
 */
function wp_list_sort( $input_list, $orderby = array(), $order = 'ASC', $preserve_keys = false ) {
	if ( ! is_array( $input_list ) ) {
		return array();
	}

$util = new WP_List_Util( $input_list );

return $util->sort( $orderby, $order, $preserve_keys );
}

/**
 * Determines if Widgets library should be loaded.
 *
 * Checks to make sure that the widgets library hasn't already been loaded.
 * If it hasn't, then it will load the widgets library and run an action hook.
 *
 * @since 2.2.0
 */
function wp_maybe_load_widgets() {
	/**
	 * Filters whether to load the Widgets library.
	 *
	 * Returning a falsey value from the filter will effectively short-circuit
	 * the Widgets library from loading.
	 *
	 * @since 2.8.0
	 *
	 * @param bool $wp_maybe_load_widgets Whether to load the Widgets library.
	 *                                    Default true.
	 */
	if ( ! apply_filters( 'load_default_widgets', true ) ) {
		return;
	}

require_once ABSPATH . WPINC . '/default-widgets.php';

add_action( '_admin_menu', 'wp_widgets_add_menu' );
}

/**
 * Appends the Widgets menu to the themes main menu.
 *
 * @since 2.2.0
 * @since 5.9.3 Don't specify menu order when the active theme is a block theme.
 *
 * @global array $submenu
 */
function wp_widgets_add_menu() {
	global $submenu;

if ( ! current_theme_supports( 'widgets' ) ) {
		return;
	}

$menu_name = __( 'Widgets' );
	if ( wp_is_block_theme() || current_theme_supports( 'block-template-parts' ) ) {
		$submenu['themes.php'][] = array( $menu_name, 'edit_theme_options', 'widgets.php' );
	} else {
		$submenu['themes.php'][8] = array( $menu_name, 'edit_theme_options', 'widgets.php' );
	}

ksort( $submenu['themes.php'], SORT_NUMERIC );
}

/**
 * Flushes all output buffers for PHP 5.2.
 *
 * Make sure all output buffers are flushed before our singletons are destroyed.
 *
 * @since 2.2.0
 */
function wp_ob_end_flush_all() {
	$levels = ob_get_level();
	for ( $i = 0; $i < $levels; $i++ ) {
		ob_end_flush();
	}
}

/**
 * Loads custom DB error or display WordPress DB error.
 *
 * If a file exists in the wp-content directory named db-error.php, then it will
 * be loaded instead of displaying the WordPress DB error. If it is not found,
 * then the WordPress DB error will be displayed instead.
 *
 * The WordPress DB error sets the HTTP status header to 500 to try to prevent
 * search engines from caching the message. Custom DB messages should do the
 * same.
 *
 * This function was backported to WordPress 2.3.2, but originally was added
 * in WordPress 2.5.0.
 *
 * @since 2.3.2
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 */
function dead_db() {
	global $wpdb;

wp_load_translations_early();

// Load custom DB error template, if present.
	if ( file_exists( WP_CONTENT_DIR . '/db-error.php' ) ) {
		require_once WP_CONTENT_DIR . '/db-error.php';
		die();
	}

// If installing or in the admin, provide the verbose message.
	if ( wp_installing() || defined( 'WP_ADMIN' ) ) {
		wp_die( $wpdb->error );
	}

// Otherwise, be terse.
	wp_die( '<h1>' . __( 'Error establishing a database connection' ) . '</h1>', __( 'Database Error' ) );
}

/**
 * Converts a value to non-negative integer.
 *
 * @since 2.5.0
 *
 * @param mixed $maybeint Data you wish to have converted to a non-negative integer.
 * @return int A non-negative integer.
 */
function absint( $maybeint ) {
	return abs( (int) $maybeint );
}

/**
 * Marks a function as deprecated and inform when it has been used.
 *
 * There is a {@see 'deprecated_function_run'} hook that will be called that can be used
 * to get the backtrace up to what file and function called the deprecated function.
 *
 * The current behavior is to trigger a user error if `WP_DEBUG` is true.
 *
 * This function is to be used in every function that is deprecated.
 *
 * @since 2.5.0
 * @since 5.4.0 This function is no longer marked as "private".
 * @since 5.4.0 The error type is now classified as E_USER_DEPRECATED (used to default to E_USER_NOTICE).
 *
 * @param string $function_name The function that was called.
 * @param string $version       The version of WordPress that deprecated the function.
 * @param string $replacement   Optional. The function that should have been called. Default empty string.
 */
function _deprecated_function( $function_name, $version, $replacement = '' ) {

/**
	 * Fires when a deprecated function is called.
	 *
	 * @since 2.5.0
	 *
	 * @param string $function_name The function that was called.
	 * @param string $replacement   The function that should have been called.
	 * @param string $version       The version of WordPress that deprecated the function.
	 */
	do_action( 'deprecated_function_run', $function_name, $replacement, $version );

/**
	 * Filters whether to trigger an error for deprecated functions.
	 *
	 * @since 2.5.0
	 *
	 * @param bool $trigger Whether to trigger the error for deprecated functions. Default true.
	 */
	if ( WP_DEBUG && apply_filters( 'deprecated_function_trigger_error', true ) ) {
		if ( function_exists( '__' ) ) {
			if ( $replacement ) {
				$message = sprintf(
					/* translators: 1: PHP function name, 2: Version number, 3: Alternative function name. */
					__( 'Function %1$s is deprecated since version %2$s! Use %3$s instead.' ),
					$function_name,
					$version,
					$replacement
				);
			} else {
				$message = sprintf(
					/* translators: 1: PHP function name, 2: Version number. */
					__( 'Function %1$s is deprecated since version %2$s with no alternative available.' ),
					$function_name,
					$version
				);
			}
		} else {
			if ( $replacement ) {
				$message = sprintf(
					'Function %1$s is deprecated since version %2$s! Use %3$s instead.',
					$function_name,
					$version,
					$replacement
				);
			} else {
				$message = sprintf(
					'Function %1$s is deprecated since version %2$s with no alternative available.',
					$function_name,
					$version
				);
			}
		}

wp_trigger_error( '', $message, E_USER_DEPRECATED );
	}
}

/**
 * Marks a constructor as deprecated and informs when it has been used.
 *
 * Similar to _deprecated_function(), but with different strings. Used to
 * remove PHP4-style constructors.
 *
 * The current behavior is to trigger a user error if `WP_DEBUG` is true.
 *
 * This function is to be used in every PHP4-style constructor method that is deprecated.
 *
 * @since 4.3.0
 * @since 4.5.0 Added the `$parent_class` parameter.
 * @since 5.4.0 This function is no longer marked as "private".
 * @since 5.4.0 The error type is now classified as E_USER_DEPRECATED (used to default to E_USER_NOTICE).
 *
 * @param string $class_name   The class containing the deprecated constructor.
 * @param string $version      The version of WordPress that deprecated the function.
 * @param string $parent_class Optional. The parent class calling the deprecated constructor.
 *                             Default empty string.
 */
function _deprecated_constructor( $class_name, $version, $parent_class = '' ) {

/**
	 * Fires when a deprecated constructor is called.
	 *
	 * @since 4.3.0
	 * @since 4.5.0 Added the `$parent_class` parameter.
	 *
	 * @param string $class_name   The class containing the deprecated constructor.
	 * @param string $version      The version of WordPress that deprecated the function.
	 * @param string $parent_class The parent class calling the deprecated constructor.
	 */
	do_action( 'deprecated_constructor_run', $class_name, $version, $parent_class );

/**
	 * Filters whether to trigger an error for deprecated functions.
	 *
	 * `WP_DEBUG` must be true in addition to the filter evaluating to true.
	 *
	 * @since 4.3.0
	 *
	 * @param bool $trigger Whether to trigger the error for deprecated functions. Default true.
	 */
	if ( WP_DEBUG && apply_filters( 'deprecated_constructor_trigger_error', true ) ) {
		if ( function_exists( '__' ) ) {
			if ( $parent_class ) {
				$message = sprintf(
					/* translators: 1: PHP class name, 2: PHP parent class name, 3: Version number, 4: __construct() method. */
					__( 'The called constructor method for %1$s class in %2$s is deprecated since version %3$s! Use %4$s instead.' ),
					$class_name,
					$parent_class,
					$version,
					'<code>__construct()</code>'
				);
			} else {
				$message = sprintf(
					/* translators: 1: PHP class name, 2: Version number, 3: __construct() method. */
					__( 'The called constructor method for %1$s class is deprecated since version %2$s! Use %3$s instead.' ),
					$class_name,
					$version,
					'<code>__construct()</code>'
				);
			}
		} else {
			if ( $parent_class ) {
				$message = sprintf(
					'The called constructor method for %1$s class in %2$s is deprecated since version %3$s! Use %4$s instead.',
					$class_name,
					$parent_class,
					$version,
					'<code>__construct()</code>'
				);
			} else {
				$message = sprintf(
					'The called constructor method for %1$s class is deprecated since version %2$s! Use %3$s instead.',
					$class_name,
					$version,
					'<code>__construct()</code>'
				);
			}
		}

wp_trigger_error( '', $message, E_USER_DEPRECATED );
	}
}

/**
 * Marks a class as deprecated and informs when it has been used.
 *
 * There is a {@see 'deprecated_class_run'} hook that will be called that can be used
 * to get the backtrace up to what file and function called the deprecated class.
 *
 * The current behavior is to trigger a user error if `WP_DEBUG` is true.
 *
 * This function is to be used in the class constructor for every deprecated class.
 * See {@see _deprecated_constructor()} for deprecating PHP4-style constructors.
 *
 * @since 6.4.0
 *
 * @param string $class_name  The name of the class being instantiated.
 * @param string $version     The version of WordPress that deprecated the class.
 * @param string $replacement Optional. The class or function that should have been called.
 *                            Default empty string.
 */
function _deprecated_class( $class_name, $version, $replacement = '' ) {

/**
	 * Fires when a deprecated class is called.
	 *
	 * @since 6.4.0
	 *
	 * @param string $class_name  The name of the class being instantiated.
	 * @param string $replacement The class or function that should have been called.
	 * @param string $version     The version of WordPress that deprecated the class.
	 */
	do_action( 'deprecated_class_run', $class_name, $replacement, $version );

/**
	 * Filters whether to trigger an error for a deprecated class.
	 *
	 * @since 6.4.0
	 *
	 * @param bool $trigger Whether to trigger an error for a deprecated class. Default true.
	 */
	if ( WP_DEBUG && apply_filters( 'deprecated_class_trigger_error', true ) ) {
		if ( function_exists( '__' ) ) {
			if ( $replacement ) {
				$message = sprintf(
					/* translators: 1: PHP class name, 2: Version number, 3: Alternative class or function name. */
					__( 'Class %1$s is deprecated since version %2$s! Use %3$s instead.' ),
					$class_name,
					$version,
					$replacement
				);
			} else {
				$message = sprintf(
					/* translators: 1: PHP class name, 2: Version number. */
					__( 'Class %1$s is deprecated since version %2$s with no alternative available.' ),
					$class_name,
					$version
				);
			}
		} else {
			if ( $replacement ) {
				$message = sprintf(
					'Class %1$s is deprecated since version %2$s! Use %3$s instead.',
					$class_name,
					$version,
					$replacement
				);
			} else {
				$message = sprintf(
					'Class %1$s is deprecated since version %2$s with no alternative available.',
					$class_name,
					$version
				);
			}
		}

wp_trigger_error( '', $message, E_USER_DEPRECATED );
	}
}

/**
 * Marks a file as deprecated and inform when it has been used.
 *
 * There is a {@see 'deprecated_file_included'} hook that will be called that can be used
 * to get the backtrace up to what file and function included the deprecated file.
 *
 * The current behavior is to trigger a user error if `WP_DEBUG` is true.
 *
 * This function is to be used in every file that is deprecated.
 *
 * @since 2.5.0
 * @since 5.4.0 This function is no longer marked as "private".
 * @since 5.4.0 The error type is now classified as E_USER_DEPRECATED (used to default to E_USER_NOTICE).
 *
 * @param string $file        The file that was included.
 * @param string $version     The version of WordPress that deprecated the file.
 * @param string $replacement Optional. The file that should have been included based on ABSPATH.
 *                            Default empty string.
 * @param string $message     Optional. A message regarding the change. Default empty string.
 */
function _deprecated_file( $file, $version, $replacement = '', $message = '' ) {

/**
	 * Fires when a deprecated file is called.
	 *
	 * @since 2.5.0
	 *
	 * @param string $file        The file that was called.
	 * @param string $replacement The file that should have been included based on ABSPATH.
	 * @param string $version     The version of WordPress that deprecated the file.
	 * @param string $message     A message regarding the change.
	 */
	do_action( 'deprecated_file_included', $file, $replacement, $version, $message );

/**
	 * Filters whether to trigger an error for deprecated files.
	 *
	 * @since 2.5.0
	 *
	 * @param bool $trigger Whether to trigger the error for deprecated files. Default true.
	 */
	if ( WP_DEBUG && apply_filters( 'deprecated_file_trigger_error', true ) ) {
		$message = empty( $message ) ? '' : ' ' . $message;

if ( function_exists( '__' ) ) {
			if ( $replacement ) {
				$message = sprintf(
					/* translators: 1: PHP file name, 2: Version number, 3: Alternative file name. */
					__( 'File %1$s is deprecated since version %2$s! Use %3$s instead.' ),
					$file,
					$version,
					$replacement
				) . $message;
			} else {
				$message = sprintf(
					/* translators: 1: PHP file name, 2: Version number. */
					__( 'File %1$s is deprecated since version %2$s with no alternative available.' ),
					$file,
					$version
				) . $message;
			}
		} else {
			if ( $replacement ) {
				$message = sprintf(
					'File %1$s is deprecated since version %2$s! Use %3$s instead.',
					$file,
					$version,
					$replacement
				);
			} else {
				$message = sprintf(
					'File %1$s is deprecated since version %2$s with no alternative available.',
					$file,
					$version
				) . $message;
			}
		}

wp_trigger_error( '', $message, E_USER_DEPRECATED );
	}
}
/**
 * Marks a function argument as deprecated and inform when it has been used.
 *
 * This function is to be used whenever a deprecated function argument is used.
 * Before this function is called, the argument must be checked for whether it was
 * used by comparing it to its default value or evaluating whether it is empty.
 *
 * For example:
 *
 *     if ( ! empty( $deprecated ) ) {
 *         _deprecated_argument( __FUNCTION__, '3.0.0' );
 *     }
 *
 * There is a {@see 'deprecated_argument_run'} hook that will be called that can be used
 * to get the backtrace up to what file and function used the deprecated argument.
 *
 * The current behavior is to trigger a user error if WP_DEBUG is true.
 *
 * @since 3.0.0
 * @since 5.4.0 This function is no longer marked as "private".
 * @since 5.4.0 The error type is now classified as E_USER_DEPRECATED (used to default to E_USER_NOTICE).
 *
 * @param string $function_name The function that was called.
 * @param string $version       The version of WordPress that deprecated the argument used.
 * @param string $message       Optional. A message regarding the change. Default empty string.
 */
function _deprecated_argument( $function_name, $version, $message = '' ) {

/**
	 * Fires when a deprecated argument is called.
	 *
	 * @since 3.0.0
	 *
	 * @param string $function_name The function that was called.
	 * @param string $message       A message regarding the change.
	 * @param string $version       The version of WordPress that deprecated the argument used.
	 */
	do_action( 'deprecated_argument_run', $function_name, $message, $version );

/**
	 * Filters whether to trigger an error for deprecated arguments.
	 *
	 * @since 3.0.0
	 *
	 * @param bool $trigger Whether to trigger the error for deprecated arguments. Default true.
	 */
	if ( WP_DEBUG && apply_filters( 'deprecated_argument_trigger_error', true ) ) {
		if ( function_exists( '__' ) ) {
			if ( $message ) {
				$message = sprintf(
					/* translators: 1: PHP function name, 2: Version number, 3: Optional message regarding the change. */
					__( 'Function %1$s was called with an argument that is deprecated since version %2$s! %3$s' ),
					$function_name,
					$version,
					$message
				);
			} else {
				$message = sprintf(
					/* translators: 1: PHP function name, 2: Version number. */
					__( 'Function %1$s was called with an argument that is deprecated since version %2$s with no alternative available.' ),
					$function_name,
					$version
				);
			}
		} else {
			if ( $message ) {
				$message = sprintf(
					'Function %1$s was called with an argument that is deprecated since version %2$s! %3$s',
					$function_name,
					$version,
					$message
				);
			} else {
				$message = sprintf(
					'Function %1$s was called with an argument that is deprecated since version %2$s with no alternative available.',
					$function_name,
					$version
				);
			}
		}

wp_trigger_error( '', $message, E_USER_DEPRECATED );
	}
}

/**
 * Marks a deprecated action or filter hook as deprecated and throws a notice.
 *
 * Use the {@see 'deprecated_hook_run'} action to get the backtrace describing where
 * the deprecated hook was called.
 *
 * Default behavior is to trigger a user error if `WP_DEBUG` is true.
 *
 * This function is called by the do_action_deprecated() and apply_filters_deprecated()
 * functions, and so generally does not need to be called directly.
 *
 * @since 4.6.0
 * @since 5.4.0 The error type is now classified as E_USER_DEPRECATED (used to default to E_USER_NOTICE).
 * @access private
 *
 * @param string $hook        The hook that was used.
 * @param string $version     The version of WordPress that deprecated the hook.
 * @param string $replacement Optional. The hook that should have been used. Default empty string.
 * @param string $message     Optional. A message regarding the change. Default empty.
 */
function _deprecated_hook( $hook, $version, $replacement = '', $message = '' ) {
	/**
	 * Fires when a deprecated hook is called.
	 *
	 * @since 4.6.0
	 *
	 * @param string $hook        The hook that was called.
	 * @param string $replacement The hook that should be used as a replacement.
	 * @param string $version     The version of WordPress that deprecated the argument used.
	 * @param string $message     A message regarding the change.
	 */
	do_action( 'deprecated_hook_run', $hook, $replacement, $version, $message );

/**
	 * Filters whether to trigger deprecated hook errors.
	 *
	 * @since 4.6.0
	 *
	 * @param bool $trigger Whether to trigger deprecated hook errors. Requires
	 *                      `WP_DEBUG` to be defined true.
	 */
	if ( WP_DEBUG && apply_filters( 'deprecated_hook_trigger_error', true ) ) {
		$message = empty( $message ) ? '' : ' ' . $message;

if ( $replacement ) {
			$message = sprintf(
				/* translators: 1: WordPress hook name, 2: Version number, 3: Alternative hook name. */
				__( 'Hook %1$s is deprecated since version %2$s! Use %3$s instead.' ),
				$hook,
				$version,
				$replacement
			) . $message;
		} else {
			$message = sprintf(
				/* translators: 1: WordPress hook name, 2: Version number. */
				__( 'Hook %1$s is deprecated since version %2$s with no alternative available.' ),
				$hook,
				$version
			) . $message;
		}

wp_trigger_error( '', $message, E_USER_DEPRECATED );
	}
}

/**
 * Marks something as being incorrectly called.
 *
 * There is a {@see 'doing_it_wrong_run'} hook that will be called that can be used
 * to get the backtrace up to what file and function called the deprecated function.
 *
 * The current behavior is to trigger a user error if `WP_DEBUG` is true.
 *
 * @since 3.1.0
 * @since 5.4.0 This function is no longer marked as "private".
 *
 * @param string $function_name The function that was called.
 * @param string $message       A message explaining what has been done incorrectly.
 * @param string $version       The version of WordPress where the message was added.
 */
function _doing_it_wrong( $function_name, $message, $version ) {

/**
	 * Fires when the given function is being used incorrectly.
	 *
	 * @since 3.1.0
	 *
	 * @param string $function_name The function that was called.
	 * @param string $message       A message explaining what has been done incorrectly.
	 * @param string $version       The version of WordPress where the message was added.
	 */
	do_action( 'doing_it_wrong_run', $function_name, $message, $version );

/**
	 * Filters whether to trigger an error for _doing_it_wrong() calls.
	 *
	 * @since 3.1.0
	 * @since 5.1.0 Added the $function_name, $message and $version parameters.
	 *
	 * @param bool   $trigger       Whether to trigger the error for _doing_it_wrong() calls. Default true.
	 * @param string $function_name The function that was called.
	 * @param string $message       A message explaining what has been done incorrectly.
	 * @param string $version       The version of WordPress where the message was added.
	 */
	if ( WP_DEBUG && apply_filters( 'doing_it_wrong_trigger_error', true, $function_name, $message, $version ) ) {
		if ( function_exists( '__' ) ) {
			if ( $version ) {
				/* translators: %s: Version number. */
				$version = sprintf( __( '(This message was added in version %s.)' ), $version );
			}

$message .= ' ' . sprintf(
				/* translators: %s: Documentation URL. */
				__( 'Please see <a href="%s">Debugging in WordPress</a> for more information.' ),
				__( 'https://wordpress.org/documentation/article/debugging-in-wordpress/' )
			);

$message = sprintf(
				/* translators: Developer debugging message. 1: PHP function name, 2: Explanatory message, 3: WordPress version number. */
				__( 'Function %1$s was called incorrectly. %2$s %3$s' ),
				$function_name,
				$message,
				$version
			);
		} else {
			if ( $version ) {
				$version = sprintf( '(This message was added in version %s.)', $version );
			}

$message .= sprintf(
				' Please see <a href="%s">Debugging in WordPress</a> for more information.',
				'https://wordpress.org/documentation/article/debugging-in-wordpress/'
			);

$message = sprintf(
				'Function %1$s was called incorrectly. %2$s %3$s',
				$function_name,
				$message,
				$version
			);
		}

wp_trigger_error( '', $message );
	}
}

/**
 * Generates a user-level error/warning/notice/deprecation message.
 *
 * Generates the message when `WP_DEBUG` is true.
 *
 * @since 6.4.0
 *
 * @param string $function_name The function that triggered the error.
 * @param string $message       The message explaining the error.
 *                              The message can contain allowed HTML 'a' (with href), 'code',
 *                              'br', 'em', and 'strong' tags and http or https protocols.
 *                              If it contains other HTML tags or protocols, the message should be escaped
 *                              before passing to this function to avoid being stripped {@see wp_kses()}.
 * @param int    $error_level   Optional. The designated error type for this error.
 *                              Only works with E_USER family of constants. Default E_USER_NOTICE.
 */
function wp_trigger_error( $function_name, $message, $error_level = E_USER_NOTICE ) {

// Bail out if WP_DEBUG is not turned on.
	if ( ! WP_DEBUG ) {
		return;
	}

/**
	 * Fires when the given function triggers a user-level error/warning/notice/deprecation message.
	 *
	 * Can be used for debug backtracking.
	 *
	 * @since 6.4.0
	 *
	 * @param string $function_name The function that was called.
	 * @param string $message       A message explaining what has been done incorrectly.
	 * @param int    $error_level   The designated error type for this error.
	 */
	do_action( 'wp_trigger_error_run', $function_name, $message, $error_level );

if ( ! empty( $function_name ) ) {
		$message = sprintf( '%s(): %s', $function_name, $message );
	}

$message = wp_kses(
		$message,
		array(
			'a' => array( 'href' ),
			'br',
			'code',
			'em',
			'strong',
		),
		array( 'http', 'https' )
	);

trigger_error( $message, $error_level );
}

/**
 * Determines whether the server is running an earlier than 1.5.0 version of lighttpd.
 *
 * @since 2.5.0
 *
 * @return bool Whether the server is running lighttpd < 1.5.0.
 */
function is_lighttpd_before_150() {
	$server_parts = explode( '/', isset( $_SERVER['SERVER_SOFTWARE'] ) ? $_SERVER['SERVER_SOFTWARE'] : '' );
	$server_parts[1] = isset( $server_parts[1] ) ? $server_parts[1] : '';

return ( 'lighttpd' === $server_parts[0] && -1 === version_compare( $server_parts[1], '1.5.0' ) );
}

/**
 * Determines whether the specified module exist in the Apache config.
 *
 * @since 2.5.0
 *
 * @global bool $is_apache
 *
 * @param string $mod           The module, e.g. mod_rewrite.
 * @param bool   $default_value Optional. The default return value if the module is not found. Default false.
 * @return bool Whether the specified module is loaded.
 */
function apache_mod_loaded( $mod, $default_value = false ) {
	global $is_apache;

if ( ! $is_apache ) {
		return false;
	}

$loaded_mods = array();

if ( function_exists( 'apache_get_modules' ) ) {
		$loaded_mods = apache_get_modules();

if ( in_array( $mod, $loaded_mods, true ) ) {
			return true;
		}
	}

if ( empty( $loaded_mods )
		&& function_exists( 'phpinfo' )
		&& ! str_contains( ini_get( 'disable_functions' ), 'phpinfo' )
	) {
		ob_start();
		phpinfo( INFO_MODULES );
		$phpinfo = ob_get_clean();

if ( str_contains( $phpinfo, $mod ) ) {
			return true;
		}
	}

return $default_value;
}

/**
 * Checks if IIS 7+ supports pretty permalinks.
 *
 * @since 2.8.0
 *
 * @global bool $is_iis7
 *
 * @return bool Whether IIS7 supports permalinks.
 */
function iis7_supports_permalinks() {
	global $is_iis7;

$supports_permalinks = false;
	if ( $is_iis7 ) {
		/* First we check if the DOMDocument class exists. If it does not exist, then we cannot
		 * easily update the xml configuration file, hence we just bail out and tell user that
		 * pretty permalinks cannot be used.
		 *
		 * Next we check if the URL Rewrite Module 1.1 is loaded and enabled for the website. When
		 * URL Rewrite 1.1 is loaded it always sets a server variable called 'IIS_UrlRewriteModule'.
		 * Lastly we make sure that PHP is running via FastCGI. This is important because if it runs
		 * via ISAPI then pretty permalinks will not work.
		 */
		$supports_permalinks = class_exists( 'DOMDocument', false ) && isset( $_SERVER['IIS_UrlRewriteModule'] ) && ( 'cgi-fcgi' === PHP_SAPI );
	}

/**
	 * Filters whether IIS 7+ supports pretty permalinks.
	 *
	 * @since 2.8.0
	 *
	 * @param bool $supports_permalinks Whether IIS7 supports permalinks. Default false.
	 */
	return apply_filters( 'iis7_supports_permalinks', $supports_permalinks );
}

/**
 * Validates a file name and path against an allowed set of rules.
 *
 * A return value of `1` means the file path contains directory traversal.
 *
 * A return value of `2` means the file path contains a Windows drive path.
 *
 * A return value of `3` means the file is not in the allowed files list.
 *
 * @since 1.2.0
 *
 * @param string   $file          File path.
 * @param string[] $allowed_files Optional. Array of allowed files. Default empty array.
 * @return int 0 means nothing is wrong, greater than 0 means something was wrong.
 */
function validate_file( $file, $allowed_files = array() ) {
	if ( ! is_scalar( $file ) || '' === $file ) {
		return 0;
	}

// Normalize path for Windows servers
	$file = wp_normalize_path( $file );

// `../` on its own is not allowed:
	if ( '../' === $file ) {
		return 1;
	}

// More than one occurrence of `../` is not allowed:
	if ( preg_match_all( '#\.\./#', $file, $matches, PREG_SET_ORDER ) && ( count( $matches ) > 1 ) ) {
		return 1;
	}

// `../` which does not occur at the end of the path is not allowed:
	if ( str_contains( $file, '../' ) && '../' !== mb_substr( $file, -3, 3 ) ) {
		return 1;
	}

// Files not in the allowed file list are not allowed:
	if ( ! empty( $allowed_files ) && ! in_array( $file, $allowed_files, true ) ) {
		return 3;
	}

// Absolute Windows drive paths are not allowed:
	if ( ':' === substr( $file, 1, 1 ) ) {
		return 2;
	}

return 0;
}

/**
 * Determines whether to force SSL used for the Administration Screens.
 *
 * @since 2.6.0
 *
 * @param string|bool $force Optional. Whether to force SSL in admin screens. Default null.
 * @return bool True if forced, false if not forced.
 */
function force_ssl_admin( $force = null ) {
	static $forced = false;

if ( ! is_null( $force ) ) {
		$old_forced = $forced;
		$forced     = $force;
		return $old_forced;
	}

return $forced;
}

/**
 * Guesses the URL for the site.
 *
 * Will remove wp-admin links to retrieve only return URLs not in the wp-admin
 * directory.
 *
 * @since 2.6.0
 *
 * @return string The guessed URL.
 */
function wp_guess_url() {
	if ( defined( 'WP_SITEURL' ) && '' !== WP_SITEURL ) {
		$url = WP_SITEURL;
	} else {
		$abspath_fix         = str_replace( '\\', '/', ABSPATH );
		$script_filename_dir = dirname( $_SERVER['SCRIPT_FILENAME'] );

// The request is for the admin.
		if ( str_contains( $_SERVER['REQUEST_URI'], 'wp-admin' ) || str_contains( $_SERVER['REQUEST_URI'], 'wp-login.php' ) ) {
			$path = preg_replace( '#/(wp-admin/?.*|wp-login\.php.*)#i', '', $_SERVER['REQUEST_URI'] );

// The request is for a file in ABSPATH.
		} elseif ( $script_filename_dir . '/' === $abspath_fix ) {
			// Strip off any file/query params in the path.
			$path = preg_replace( '#/[^/]*$#i', '', $_SERVER['PHP_SELF'] );

} else {
			if ( str_contains( $_SERVER['SCRIPT_FILENAME'], $abspath_fix ) ) {
				// Request is hitting a file inside ABSPATH.
				$directory = str_replace( ABSPATH, '', $script_filename_dir );
				// Strip off the subdirectory, and any file/query params.
				$path = preg_replace( '#/' . preg_quote( $directory, '#' ) . '/[^/]*$#i', '', $_SERVER['REQUEST_URI'] );
			} elseif ( str_contains( $abspath_fix, $script_filename_dir ) ) {
				// Request is hitting a file above ABSPATH.
				$subdirectory = substr( $abspath_fix, strpos( $abspath_fix, $script_filename_dir ) + strlen( $script_filename_dir ) );
				// Strip off any file/query params from the path, appending the subdirectory to the installation.
				$path = preg_replace( '#/[^/]*$#i', '', $_SERVER['REQUEST_URI'] ) . $subdirectory;
			} else {
				$path = $_SERVER['REQUEST_URI'];
			}
		}

$schema = is_ssl() ? 'https://' : 'http://'; // set_url_scheme() is not defined yet.
		$url    = $schema . $_SERVER['HTTP_HOST'] . $path;
	}

return rtrim( $url, '/' );
}

/**
 * Temporarily suspends cache additions.
 *
 * Stops more data being added to the cache, but still allows cache retrieval.
 * This is usefu