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<?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)