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<?php
/**
 * WordPress Link Template Functions
 *
 * @package WordPress
 * @subpackage Template
 */

/**
 * Displays the permalink for the current post.
 *
 * @since 1.2.0
 * @since 4.4.0 Added the `$post` parameter.
 *
 * @param int|WP_Post $post Optional. Post ID or post object. Default is the global `$post`.
 */
function the_permalink( $post = 0 ) {
	/**
	 * Filters the display of the permalink for the current post.
	 *
	 * @since 1.5.0
	 * @since 4.4.0 Added the `$post` parameter.
	 *
	 * @param string      $permalink The permalink for the current post.
	 * @param int|WP_Post $post      Post ID, WP_Post object, or 0. Default 0.
	 */
	echo esc_url( apply_filters( 'the_permalink', get_permalink( $post ), $post ) );
}

/**
 * Retrieves a trailing-slashed string if the site is set for adding trailing slashes.
 *
 * Conditionally adds a trailing slash if the permalink structure has a trailing
 * slash, strips the trailing slash if not. The string is passed through the
 * {@see 'user_trailingslashit'} filter. Will remove trailing slash from string, if
 * site is not set to have them.
 *
 * @since 2.2.0
 *
 * @global WP_Rewrite $wp_rewrite WordPress rewrite component.
 *
 * @param string $url         URL with or without a trailing slash.
 * @param string $type_of_url Optional. The type of URL being considered (e.g. single, category, etc)
 *                            for use in the filter. Default empty string.
 * @return string The URL with the trailing slash appended or stripped.
 */
function user_trailingslashit( $url, $type_of_url = '' ) {
	global $wp_rewrite;
	if ( $wp_rewrite->use_trailing_slashes ) {
		$url = trailingslashit( $url );
	} else {
		$url = untrailingslashit( $url );
	}

/**
	 * Filters the trailing-slashed string, depending on whether the site is set to use trailing slashes.
	 *
	 * @since 2.2.0
	 *
	 * @param string $url         URL with or without a trailing slash.
	 * @param string $type_of_url The type of URL being considered. Accepts 'single', 'single_trackback',
	 *                            'single_feed', 'single_paged', 'commentpaged', 'paged', 'home', 'feed',
	 *                            'category', 'page', 'year', 'month', 'day', 'post_type_archive'.
	 */
	return apply_filters( 'user_trailingslashit', $url, $type_of_url );
}

/**
 * Displays the permalink anchor for the current post.
 *
 * The permalink mode title will use the post title for the 'a' element 'id'
 * attribute. The id mode uses 'post-' with the post ID for the 'id' attribute.
 *
 * @since 0.71
 *
 * @param string $mode Optional. Permalink mode. Accepts 'title' or 'id'. Default 'id'.
 */
function permalink_anchor( $mode = 'id' ) {
	$post = get_post();
	switch ( strtolower( $mode ) ) {
		case 'title':
			$title = sanitize_title( $post->post_title ) . '-' . $post->ID;
			echo '<a id="' . $title . '"></a>';
			break;
		case 'id':
		default:
			echo '<a id="post-' . $post->ID . '"></a>';
			break;
	}
}

/**
 * Determine whether post should always use a plain permalink structure.
 *
 * @since 5.7.0
 *
 * @param WP_Post|int|null $post   Optional. Post ID or post object. Defaults to global $post.
 * @param bool|null        $sample Optional. Whether to force consideration based on sample links.
 *                                 If omitted, a sample link is generated if a post object is passed
 *                                 with the filter property set to 'sample'.
 * @return bool Whether to use a plain permalink structure.
 */
function wp_force_plain_post_permalink( $post = null, $sample = null ) {
	if (
		null === $sample &&
		is_object( $post ) &&
		isset( $post->filter ) &&
		'sample' === $post->filter
	) {
		$sample = true;
	} else {
		$post   = get_post( $post );
		$sample = null !== $sample ? $sample : false;
	}

if ( ! $post ) {
		return true;
	}

$post_status_obj = get_post_status_object( get_post_status( $post ) );
	$post_type_obj   = get_post_type_object( get_post_type( $post ) );

if ( ! $post_status_obj || ! $post_type_obj ) {
		return true;
	}

if (
		// Publicly viewable links never have plain permalinks.
		is_post_status_viewable( $post_status_obj ) ||
		(
			// Private posts don't have plain permalinks if the user can read them.
			$post_status_obj->private &&
			current_user_can( 'read_post', $post->ID )
		) ||
		// Protected posts don't have plain links if getting a sample URL.
		( $post_status_obj->protected && $sample )
	) {
		return false;
	}

return true;
}

/**
 * Retrieves the full permalink for the current post or post ID.
 *
 * This function is an alias for get_permalink().
 *
 * @since 3.9.0
 *
 * @see get_permalink()
 *
 * @param int|WP_Post $post      Optional. Post ID or post object. Default is the global `$post`.
 * @param bool        $leavename Optional. Whether to keep post name or page name. Default false.
 * @return string|false The permalink URL. False if the post does not exist.
 */
function get_the_permalink( $post = 0, $leavename = false ) {
	return get_permalink( $post, $leavename );
}

/**
 * Retrieves the full permalink for the current post or post ID.
 *
 * @since 1.0.0
 *
 * @param int|WP_Post $post      Optional. Post ID or post object. Default is the global `$post`.
 * @param bool        $leavename Optional. Whether to keep post name or page name. Default false.
 * @return string|false The permalink URL. False if the post does not exist.
 */
function get_permalink( $post = 0, $leavename = false ) {
	$rewritecode = array(
		'%year%',
		'%monthnum%',
		'%day%',
		'%hour%',
		'%minute%',
		'%second%',
		$leavename ? '' : '%postname%',
		'%post_id%',
		'%category%',
		'%author%',
		$leavename ? '' : '%pagename%',
	);

if ( is_object( $post ) && isset( $post->filter ) && 'sample' === $post->filter ) {
		$sample = true;
	} else {
		$post   = get_post( $post );
		$sample = false;
	}

if ( empty( $post->ID ) ) {
		return false;
	}

if ( 'page' === $post->post_type ) {
		return get_page_link( $post, $leavename, $sample );
	} elseif ( 'attachment' === $post->post_type ) {
		return get_attachment_link( $post, $leavename );
	} elseif ( in_array( $post->post_type, get_post_types( array( '_builtin' => false ) ), true ) ) {
		return get_post_permalink( $post, $leavename, $sample );
	}

$permalink = get_option( 'permalink_structure' );

/**
	 * Filters the permalink structure for a post before token replacement occurs.
	 *
	 * Only applies to posts with post_type of 'post'.
	 *
	 * @since 3.0.0
	 *
	 * @param string  $permalink The site's permalink structure.
	 * @param WP_Post $post      The post in question.
	 * @param bool    $leavename Whether to keep the post name.
	 */
	$permalink = apply_filters( 'pre_post_link', $permalink, $post, $leavename );

if (
		$permalink &&
		! wp_force_plain_post_permalink( $post )
	) {

$category = '';
		if ( str_contains( $permalink, '%category%' ) ) {
			$cats = get_the_category( $post->ID );
			if ( $cats ) {
				$cats = wp_list_sort(
					$cats,
					array(
						'term_id' => 'ASC',
					)
				);

/**
				 * Filters the category that gets used in the %category% permalink token.
				 *
				 * @since 3.5.0
				 *
				 * @param WP_Term  $cat  The category to use in the permalink.
				 * @param array    $cats Array of all categories (WP_Term objects) associated with the post.
				 * @param WP_Post  $post The post in question.
				 */
				$category_object = apply_filters( 'post_link_category', $cats[0], $cats, $post );

$category_object = get_term( $category_object, 'category' );
				$category        = $category_object->slug;
				if ( $category_object->parent ) {
					$category = get_category_parents( $category_object->parent, false, '/', true ) . $category;
				}
			}
			/*
			 * Show default category in permalinks,
			 * without having to assign it explicitly.
			 */
			if ( empty( $category ) ) {
				$default_category = get_term( get_option( 'default_category' ), 'category' );
				if ( $default_category && ! is_wp_error( $default_category ) ) {
					$category = $default_category->slug;
				}
			}
		}

$author = '';
		if ( str_contains( $permalink, '%author%' ) ) {
			$authordata = get_userdata( $post->post_author );
			$author     = $authordata->user_nicename;
		}

/*
		 * This is not an API call because the permalink is based on the stored post_date value,
		 * which should be parsed as local time regardless of the default PHP timezone.
		 */
		$date = explode( ' ', str_replace( array( '-', ':' ), ' ', $post->post_date ) );

$rewritereplace = array(
			$date[0],
			$date[1],
			$date[2],
			$date[3],
			$date[4],
			$date[5],
			$post->post_name,
			$post->ID,
			$category,
			$author,
			$post->post_name,
		);

$permalink = home_url( str_replace( $rewritecode, $rewritereplace, $permalink ) );
		$permalink = user_trailingslashit( $permalink, 'single' );

} else { // If they're not using the fancy permalink option.
		$permalink = home_url( '?p=' . $post->ID );
	}

/**
	 * Filters the permalink for a post.
	 *
	 * Only applies to posts with post_type of 'post'.
	 *
	 * @since 1.5.0
	 *
	 * @param string  $permalink The post's permalink.
	 * @param WP_Post $post      The post in question.
	 * @param bool    $leavename Whether to keep the post name.
	 */
	return apply_filters( 'post_link', $permalink, $post, $leavename );
}

/**
 * Retrieves the permalink for a post of a custom post type.
 *
 * @since 3.0.0
 * @since 6.1.0 Returns false if the post does not exist.
 *
 * @global WP_Rewrite $wp_rewrite WordPress rewrite component.
 *
 * @param int|WP_Post $post      Optional. Post ID or post object. Default is the global `$post`.
 * @param bool        $leavename Optional. Whether to keep post name. Default false.
 * @param bool        $sample    Optional. Is it a sample permalink. Default false.
 * @return string|false The post permalink URL. False if the post does not exist.
 */
function get_post_permalink( $post = 0, $leavename = false, $sample = false ) {
	global $wp_rewrite;

$post = get_post( $post );

if ( ! $post ) {
		return false;
	}

$post_link = $wp_rewrite->get_extra_permastruct( $post->post_type );

$slug = $post->post_name;

$force_plain_link = wp_force_plain_post_permalink( $post );

$post_type = get_post_type_object( $post->post_type );

if ( $post_type->hierarchical ) {
		$slug = get_page_uri( $post );
	}

if ( ! empty( $post_link ) && ( ! $force_plain_link || $sample ) ) {
		if ( ! $leavename ) {
			$post_link = str_replace( "%$post->post_type%", $slug, $post_link );
		}
		$post_link = home_url( user_trailingslashit( $post_link ) );
	} else {
		if ( $post_type->query_var && ( isset( $post->post_status ) && ! $force_plain_link ) ) {
			$post_link = add_query_arg( $post_type->query_var, $slug, '' );
		} else {
			$post_link = add_query_arg(
				array(
					'post_type' => $post->post_type,
					'p'         => $post->ID,
				),
				''
			);
		}
		$post_link = home_url( $post_link );
	}

/**
	 * Filters the permalink for a post of a custom post type.
	 *
	 * @since 3.0.0
	 *
	 * @param string  $post_link The post's permalink.
	 * @param WP_Post $post      The post in question.
	 * @param bool    $leavename Whether to keep the post name.
	 * @param bool    $sample    Is it a sample permalink.
	 */
	return apply_filters( 'post_type_link', $post_link, $post, $leavename, $sample );
}

/**
 * Retrieves the permalink for the current page or page ID.
 *
 * Respects page_on_front. Use this one.
 *
 * @since 1.5.0
 *
 * @param int|WP_Post $post      Optional. Post ID or object. Default uses the global `$post`.
 * @param bool        $leavename Optional. Whether to keep the page name. Default false.
 * @param bool        $sample    Optional. Whether it should be treated as a sample permalink.
 *                               Default false.
 * @return string The page permalink.
 */
function get_page_link( $post = false, $leavename = false, $sample = false ) {
	$post = get_post( $post );

if ( 'page' === get_option( 'show_on_front' ) && get_option( 'page_on_front' ) == $post->ID ) {
		$link = home_url( '/' );
	} else {
		$link = _get_page_link( $post, $leavename, $sample );
	}

/**
	 * Filters the permalink for a page.
	 *
	 * @since 1.5.0
	 *
	 * @param string $link    The page's permalink.
	 * @param int    $post_id The ID of the page.
	 * @param bool   $sample  Is it a sample permalink.
	 */
	return apply_filters( 'page_link', $link, $post->ID, $sample );
}

/**
 * Retrieves the page permalink.
 *
 * Ignores page_on_front. Internal use only.
 *
 * @since 2.1.0
 * @access private
 *
 * @global WP_Rewrite $wp_rewrite WordPress rewrite component.
 *
 * @param int|WP_Post $post      Optional. Post ID or object. Default uses the global `$post`.
 * @param bool        $leavename Optional. Whether to keep the page name. Default false.
 * @param bool        $sample    Optional. Whether it should be treated as a sample permalink.
 *                               Default false.
 * @return string The page permalink.
 */
function _get_page_link( $post = false, $leavename = false, $sample = false ) {
	global $wp_rewrite;

$post = get_post( $post );

$force_plain_link = wp_force_plain_post_permalink( $post );

$link = $wp_rewrite->get_page_permastruct();

if ( ! empty( $link ) && ( ( isset( $post->post_status ) && ! $force_plain_link ) || $sample ) ) {
		if ( ! $leavename ) {
			$link = str_replace( '%pagename%', get_page_uri( $post ), $link );
		}

$link = home_url( $link );
		$link = user_trailingslashit( $link, 'page' );
	} else {
		$link = home_url( '?page_id=' . $post->ID );
	}

/**
	 * Filters the permalink for a non-page_on_front page.
	 *
	 * @since 2.1.0
	 *
	 * @param string $link    The page's permalink.
	 * @param int    $post_id The ID of the page.
	 */
	return apply_filters( '_get_page_link', $link, $post->ID );
}

/**
 * Retrieves the permalink for an attachment.
 *
 * This can be used in the WordPress Loop or outside of it.
 *
 * @since 2.0.0
 *
 * @global WP_Rewrite $wp_rewrite WordPress rewrite component.
 *
 * @param int|object $post      Optional. Post ID or object. Default uses the global `$post`.
 * @param bool       $leavename Optional. Whether to keep the page name. Default false.
 * @return string The attachment permalink.
 */
function get_attachment_link( $post = null, $leavename = false ) {
	global $wp_rewrite;

$link = false;

$post             = get_post( $post );
	$force_plain_link = wp_force_plain_post_permalink( $post );
	$parent_id        = $post->post_parent;
	$parent           = $parent_id ? get_post( $parent_id ) : false;
	$parent_valid     = true; // Default for no parent.
	if (
		$parent_id &&
		(
			$post->post_parent === $post->ID ||
			! $parent ||
			! is_post_type_viewable( get_post_type( $parent ) )
		)
	) {
		// Post is either its own parent or parent post unavailable.
		$parent_valid = false;
	}

if ( $force_plain_link || ! $parent_valid ) {
		$link = false;
	} elseif ( $wp_rewrite->using_permalinks() && $parent ) {
		if ( 'page' === $parent->post_type ) {
			$parentlink = _get_page_link( $post->post_parent ); // Ignores page_on_front.
		} else {
			$parentlink = get_permalink( $post->post_parent );
		}

if ( is_numeric( $post->post_name ) || str_contains( get_option( 'permalink_structure' ), '%category%' ) ) {
			$name = 'attachment/' . $post->post_name; // <permalink>/<int>/ is paged so we use the explicit attachment marker.
		} else {
			$name = $post->post_name;
		}

if ( ! str_contains( $parentlink, '?' ) ) {
			$link = user_trailingslashit( trailingslashit( $parentlink ) . '%postname%' );
		}

if ( ! $leavename ) {
			$link = str_replace( '%postname%', $name, $link );
		}
	} elseif ( $wp_rewrite->using_permalinks() && ! $leavename ) {
		$link = home_url( user_trailingslashit( $post->post_name ) );
	}

if ( ! $link ) {
		$link = home_url( '/?attachment_id=' . $post->ID );
	}

/**
	 * Filters the permalink for an attachment.
	 *
	 * @since 2.0.0
	 * @since 5.6.0 Providing an empty string will now disable
	 *              the view attachment page link on the media modal.
	 *
	 * @param string $link    The attachment's permalink.
	 * @param int    $post_id Attachment ID.
	 */
	return apply_filters( 'attachment_link', $link, $post->ID );
}

/**
 * Retrieves the permalink for the year archives.
 *
 * @since 1.5.0
 *
 * @global WP_Rewrite $wp_rewrite WordPress rewrite component.
 *
 * @param int|false $year Integer of year. False for current year.
 * @return string The permalink for the specified year archive.
 */
function get_year_link( $year ) {
	global $wp_rewrite;
	if ( ! $year ) {
		$year = current_time( 'Y' );
	}
	$yearlink = $wp_rewrite->get_year_permastruct();
	if ( ! empty( $yearlink ) ) {
		$yearlink = str_replace( '%year%', $year, $yearlink );
		$yearlink = home_url( user_trailingslashit( $yearlink, 'year' ) );
	} else {
		$yearlink = home_url( '?m=' . $year );
	}

/**
	 * Filters the year archive permalink.
	 *
	 * @since 1.5.0
	 *
	 * @param string $yearlink Permalink for the year archive.
	 * @param int    $year     Year for the archive.
	 */
	return apply_filters( 'year_link', $yearlink, $year );
}

/**
 * Retrieves the permalink for the month archives with year.
 *
 * @since 1.0.0
 *
 * @global WP_Rewrite $wp_rewrite WordPress rewrite component.
 *
 * @param int|false $year  Integer of year. False for current year.
 * @param int|false $month Integer of month. False for current month.
 * @return string The permalink for the specified month and year archive.
 */
function get_month_link( $year, $month ) {
	global $wp_rewrite;
	if ( ! $year ) {
		$year = current_time( 'Y' );
	}
	if ( ! $month ) {
		$month = current_time( 'm' );
	}
	$monthlink = $wp_rewrite->get_month_permastruct();
	if ( ! empty( $monthlink ) ) {
		$monthlink = str_replace( '%year%', $year, $monthlink );
		$monthlink = str_replace( '%monthnum%', zeroise( (int) $month, 2 ), $monthlink );
		$monthlink = home_url( user_trailingslashit( $monthlink, 'month' ) );
	} else {
		$monthlink = home_url( '?m=' . $year . zeroise( $month, 2 ) );
	}

/**
	 * Filters the month archive permalink.
	 *
	 * @since 1.5.0
	 *
	 * @param string $monthlink Permalink for the month archive.
	 * @param int    $year      Year for the archive.
	 * @param int    $month     The month for the archive.
	 */
	return apply_filters( 'month_link', $monthlink, $year, $month );
}

/**
 * Retrieves the permalink for the day archives with year and month.
 *
 * @since 1.0.0
 *
 * @global WP_Rewrite $wp_rewrite WordPress rewrite component.
 *
 * @param int|false $year  Integer of year. False for current year.
 * @param int|false $month Integer of month. False for current month.
 * @param int|false $day   Integer of day. False for current day.
 * @return string The permalink for the specified day, month, and year archive.
 */
function get_day_link( $year, $month, $day ) {
	global $wp_rewrite;
	if ( ! $year ) {
		$year = current_time( 'Y' );
	}
	if ( ! $month ) {
		$month = current_time( 'm' );
	}
	if ( ! $day ) {
		$day = current_time( 'j' );
	}

$daylink = $wp_rewrite->get_day_permastruct();
	if ( ! empty( $daylink ) ) {
		$daylink = str_replace( '%year%', $year, $daylink );
		$daylink = str_replace( '%monthnum%', zeroise( (int) $month, 2 ), $daylink );
		$daylink = str_replace( '%day%', zeroise( (int) $day, 2 ), $daylink );
		$daylink = home_url( user_trailingslashit( $daylink, 'day' ) );
	} else {
		$daylink = home_url( '?m=' . $year . zeroise( $month, 2 ) . zeroise( $day, 2 ) );
	}

/**
	 * Filters the day archive permalink.
	 *
	 * @since 1.5.0
	 *
	 * @param string $daylink Permalink for the day archive.
	 * @param int    $year    Year for the archive.
	 * @param int    $month   Month for the archive.
	 * @param int    $day     The day for the archive.
	 */
	return apply_filters( 'day_link', $daylink, $year, $month, $day );
}

/**
 * Displays the permalink for the feed type.
 *
 * @since 3.0.0
 *
 * @param string $anchor The link's anchor text.
 * @param string $feed   Optional. Feed type. Possible values include 'rss2', 'atom'.
 *                       Default is the value of get_default_feed().
 */
function the_feed_link( $anchor, $feed = '' ) {
	$link = '<a href="' . esc_url( get_feed_link( $feed ) ) . '">' . $anchor . '</a>';

/**
	 * Filters the feed link anchor tag.
	 *
	 * @since 3.0.0
	 *
	 * @param string $link The complete anchor tag for a feed link.
	 * @param string $feed The feed type. Possible values include 'rss2', 'atom',
	 *                     or an empty string for the default feed type.
	 */
	echo apply_filters( 'the_feed_link', $link, $feed );
}

/**
 * Retrieves the permalink for the feed type.
 *
 * @since 1.5.0
 *
 * @global WP_Rewrite $wp_rewrite WordPress rewrite component.
 *
 * @param string $feed Optional. Feed type. Possible values include 'rss2', 'atom'.
 *                     Default is the value of get_default_feed().
 * @return string The feed permalink.
 */
function get_feed_link( $feed = '' ) {
	global $wp_rewrite;

$permalink = $wp_rewrite->get_feed_permastruct();

if ( $permalink ) {
		if ( str_contains( $feed, 'comments_' ) ) {
			$feed      = str_replace( 'comments_', '', $feed );
			$permalink = $wp_rewrite->get_comment_feed_permastruct();
		}

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

$permalink = str_replace( '%feed%', $feed, $permalink );
		$permalink = preg_replace( '#/+#', '/', "/$permalink" );
		$output    = home_url( user_trailingslashit( $permalink, 'feed' ) );
	} else {
		if ( empty( $feed ) ) {
			$feed = get_default_feed();
		}

if ( str_contains( $feed, 'comments_' ) ) {
			$feed = str_replace( 'comments_', 'comments-', $feed );
		}

$output = home_url( "?feed={$feed}" );
	}

/**
	 * Filters the feed type permalink.
	 *
	 * @since 1.5.0
	 *
	 * @param string $output The feed permalink.
	 * @param string $feed   The feed type. Possible values include 'rss2', 'atom',
	 *                       or an empty string for the default feed type.
	 */
	return apply_filters( 'feed_link', $output, $feed );
}

/**
 * Retrieves the permalink for the post comments feed.
 *
 * @since 2.2.0
 *
 * @param int    $post_id Optional. Post ID. Default is the ID of the global `$post`.
 * @param string $feed    Optional. Feed type. Possible values include 'rss2', 'atom'.
 *                        Default is the value of get_default_feed().
 * @return string The permalink for the comments feed for the given post on success, empty string on failure.
 */
function get_post_comments_feed_link( $post_id = 0, $feed = '' ) {
	$post_id = absint( $post_id );

if ( ! $post_id ) {
		$post_id = get_the_ID();
	}

if ( empty( $feed ) ) {
		$feed = get_default_feed();
	}

$post = get_post( $post_id );

// Bail out if the post does not exist.
	if ( ! $post instanceof WP_Post ) {
		return '';
	}

$unattached = 'attachment' === $post->post_type && 0 === (int) $post->post_parent;

if ( get_option( 'permalink_structure' ) ) {
		if ( 'page' === get_option( 'show_on_front' ) && get_option( 'page_on_front' ) == $post_id ) {
			$url = _get_page_link( $post_id );
		} else {
			$url = get_permalink( $post_id );
		}

if ( $unattached ) {
			$url = home_url( '/feed/' );
			if ( get_default_feed() !== $feed ) {
				$url .= "$feed/";
			}
			$url = add_query_arg( 'attachment_id', $post_id, $url );
		} else {
			$url = trailingslashit( $url ) . 'feed';
			if ( get_default_feed() != $feed ) {
				$url .= "/$feed";
			}
			$url = user_trailingslashit( $url, 'single_feed' );
		}
	} else {
		if ( $unattached ) {
			$url = add_query_arg(
				array(
					'feed'          => $feed,
					'attachment_id' => $post_id,
				),
				home_url( '/' )
			);
		} elseif ( 'page' === $post->post_type ) {
			$url = add_query_arg(
				array(
					'feed'    => $feed,
					'page_id' => $post_id,
				),
				home_url( '/' )
			);
		} else {
			$url = add_query_arg(
				array(
					'feed' => $feed,
					'p'    => $post_id,
				),
				home_url( '/' )
			);
		}
	}

/**
	 * Filters the post comments feed permalink.
	 *
	 * @since 1.5.1
	 *
	 * @param string $url Post comments feed permalink.
	 */
	return apply_filters( 'post_comments_feed_link', $url );
}

/**
 * Displays the comment feed link for a post.
 *
 * Prints out the comment feed link for a post. Link text is placed in the
 * anchor. If no link text is specified, default text is used. If no post ID is
 * specified, the current post is used.
 *
 * @since 2.5.0
 *
 * @param string $link_text Optional. Descriptive link text. Default 'Comments Feed'.
 * @param int    $post_id   Optional. Post ID. Default is the ID of the global `$post`.
 * @param string $feed      Optional. Feed type. Possible values include 'rss2', 'atom'.
 *                          Default is the value of get_default_feed().
 */
function post_comments_feed_link( $link_text = '', $post_id = '', $feed = '' ) {
	$url = get_post_comments_feed_link( $post_id, $feed );
	if ( empty( $link_text ) ) {
		$link_text = __( 'Comments Feed' );
	}

$link = '<a href="' . esc_url( $url ) . '">' . $link_text . '</a>';
	/**
	 * Filters the post comment feed link anchor tag.
	 *
	 * @since 2.8.0
	 *
	 * @param string $link    The complete anchor tag for the comment feed link.
	 * @param int    $post_id Post ID.
	 * @param string $feed    The feed type. Possible values include 'rss2', 'atom',
	 *                        or an empty string for the default feed type.
	 */
	echo apply_filters( 'post_comments_feed_link_html', $link, $post_id, $feed );
}

/**
 * Retrieves the feed link for a given author.
 *
 * Returns a link to the feed for all posts by a given author. A specific feed
 * can be requested or left blank to get the default feed.
 *
 * @since 2.5.0
 *
 * @param int    $author_id Author ID.
 * @param string $feed      Optional. Feed type. Possible values include 'rss2', 'atom'.
 *                          Default is the value of get_default_feed().
 * @return string Link to the feed for the author specified by $author_id.
 */
function get_author_feed_link( $author_id, $feed = '' ) {
	$author_id           = (int) $author_id;
	$permalink_structure = get_option( 'permalink_structure' );

if ( empty( $feed ) ) {
		$feed = get_default_feed();
	}

if ( ! $permalink_structure ) {
		$link = home_url( "?feed=$feed&author=" . $author_id );
	} else {
		$link = get_author_posts_url( $author_id );
		if ( get_default_feed() == $feed ) {
			$feed_link = 'feed';
		} else {
			$feed_link = "feed/$feed";
		}

$link = trailingslashit( $link ) . user_trailingslashit( $feed_link, 'feed' );
	}

/**
	 * Filters the feed link for a given author.
	 *
	 * @since 1.5.1
	 *
	 * @param string $link The author feed link.
	 * @param string $feed Feed type. Possible values include 'rss2', 'atom'.
	 */
	$link = apply_filters( 'author_feed_link', $link, $feed );

return $link;
}

/**
 * Retrieves the feed link for a category.
 *
 * Returns a link to the feed for all posts in a given category. A specific feed
 * can be requested or left blank to get the default feed.
 *
 * @since 2.5.0
 *
 * @param int|WP_Term|object $cat  The ID or category object whose feed link will be retrieved.
 * @param string             $feed Optional. Feed type. Possible values include 'rss2', 'atom'.
 *                                 Default is the value of get_default_feed().
 * @return string Link to the feed for the category specified by `$cat`.
 */
function get_category_feed_link( $cat, $feed = '' ) {
	return get_term_feed_link( $cat, 'category', $feed );
}

/**
 * Retrieves the feed link for a term.
 *
 * Returns a link to the feed for all posts in a given term. A specific feed
 * can be requested or left blank to get the default feed.
 *
 * @since 3.0.0
 *
 * @param int|WP_Term|object $term     The ID or term object whose feed link will be retrieved.
 * @param string             $taxonomy Optional. Taxonomy of `$term_id`.
 * @param string             $feed     Optional. Feed type. Possible values include 'rss2', 'atom'.
 *                                     Default is the value of get_default_feed().
 * @return string|false Link to the feed for the term specified by `$term` and `$taxonomy`.
 */
function get_term_feed_link( $term, $taxonomy = '', $feed = '' ) {
	if ( ! is_object( $term ) ) {
		$term = (int) $term;
	}

$term = get_term( $term, $taxonomy );

if ( empty( $term ) || is_wp_error( $term ) ) {
		return false;
	}

$taxonomy = $term->taxonomy;

if ( empty( $feed ) ) {
		$feed = get_default_feed();
	}

$permalink_structure = get_option( 'permalink_structure' );

if ( ! $permalink_structure ) {
		if ( 'category' === $taxonomy ) {
			$link = home_url( "?feed=$feed&cat=$term->term_id" );
		} elseif ( 'post_tag' === $taxonomy ) {
			$link = home_url( "?feed=$feed&tag=$term->slug" );
		} else {
			$t    = get_taxonomy( $taxonomy );
			$link = home_url( "?feed=$feed&$t->query_var=$term->slug" );
		}
	} else {
		$link = get_term_link( $term, $term->taxonomy );
		if ( get_default_feed() == $feed ) {
			$feed_link = 'feed';
		} else {
			$feed_link = "feed/$feed";
		}

$link = trailingslashit( $link ) . user_trailingslashit( $feed_link, 'feed' );
	}

if ( 'category' === $taxonomy ) {
		/**
		 * Filters the category feed link.
		 *
		 * @since 1.5.1
		 *
		 * @param string $link The category feed link.
		 * @param string $feed Feed type. Possible values include 'rss2', 'atom'.
		 */
		$link = apply_filters( 'category_feed_link', $link, $feed );
	} elseif ( 'post_tag' === $taxonomy ) {
		/**
		 * Filters the post tag feed link.
		 *
		 * @since 2.3.0
		 *
		 * @param string $link The tag feed link.
		 * @param string $feed Feed type. Possible values include 'rss2', 'atom'.
		 */
		$link = apply_filters( 'tag_feed_link', $link, $feed );
	} else {
		/**
		 * Filters the feed link for a taxonomy other than 'category' or 'post_tag'.
		 *
		 * @since 3.0.0
		 *
		 * @param string $link     The taxonomy feed link.
		 * @param string $feed     Feed type. Possible values include 'rss2', 'atom'.
		 * @param string $taxonomy The taxonomy name.
		 */
		$link = apply_filters( 'taxonomy_feed_link', $link, $feed, $taxonomy );
	}

return $link;
}

/**
 * Retrieves the permalink for a tag feed.
 *
 * @since 2.3.0
 *
 * @param int|WP_Term|object $tag  The ID or term object whose feed link will be retrieved.
 * @param string             $feed Optional. Feed type. Possible values include 'rss2', 'atom'.
 *                                 Default is the value of get_default_feed().
 * @return string                  The feed permalink for the given tag.
 */
function get_tag_feed_link( $tag, $feed = '' ) {
	return get_term_feed_link( $tag, 'post_tag', $feed );
}

/**
 * Retrieves the edit link for a tag.
 *
 * @since 2.7.0
 *
 * @param int|WP_Term|object $tag      The ID or term object whose edit link will be retrieved.
 * @param string             $taxonomy Optional. Taxonomy slug. Default 'post_tag'.
 * @return string The edit tag link URL for the given tag.
 */
function get_edit_tag_link( $tag, $taxonomy = 'post_tag' ) {
	/**
	 * Filters the edit link for a tag (or term in another taxonomy).
	 *
	 * @since 2.7.0
	 *
	 * @param string $link The term edit link.
	 */
	return apply_filters( 'get_edit_tag_link', get_edit_term_link( $tag, $taxonomy ) );
}

/**
 * Displays or retrieves the edit link for a tag with formatting.
 *
 * @since 2.7.0
 *
 * @param string  $link   Optional. Anchor text. If empty, default is 'Edit This'. Default empty.
 * @param string  $before Optional. Display before edit link. Default empty.
 * @param string  $after  Optional. Display after edit link. Default empty.
 * @param WP_Term $tag    Optional. Term object. If null, the queried object will be inspected.
 *                        Default null.
 */
function edit_tag_link( $link = '', $before = '', $after = '', $tag = null ) {
	$link = edit_term_link( $link, '', '', $tag, false );

/**
	 * Filters the anchor tag for the edit link for a tag (or term in another taxonomy).
	 *
	 * @since 2.7.0
	 *
	 * @param string $link The anchor tag for the edit link.
	 */
	echo $before . apply_filters( 'edit_tag_link', $link ) . $after;
}

/**
 * Retrieves the URL for editing a given term.
 *
 * @since 3.1.0
 * @since 4.5.0 The `$taxonomy` parameter was made optional.
 *
 * @param int|WP_Term|object $term        The ID or term object whose edit link will be retrieved.
 * @param string             $taxonomy    Optional. Taxonomy. Defaults to the taxonomy of the term identified
 *                                        by `$term`.
 * @param string             $object_type Optional. The object type. Used to highlight the proper post type
 *                                        menu on the linked page. Defaults to the first object_type associated
 *                                        with the taxonomy.
 * @return string|null The edit term link URL for the given term, or null on failure.
 */
function get_edit_term_link( $term, $taxonomy = '', $object_type = '' ) {
	$term = get_term( $term, $taxonomy );
	if ( ! $term || is_wp_error( $term ) ) {
		return;
	}

$tax     = get_taxonomy( $term->taxonomy );
	$term_id = $term->term_id;
	if ( ! $tax || ! current_user_can( 'edit_term', $term_id ) ) {
		return;
	}

$args = array(
		'taxonomy' => $taxonomy,
		'tag_ID'   => $term_id,
	);

if ( $object_type ) {
		$args['post_type'] = $object_type;
	} elseif ( ! empty( $tax->object_type ) ) {
		$args['post_type'] = reset( $tax->object_type );
	}

if ( $tax->show_ui ) {
		$location = add_query_arg( $args, admin_url( 'term.php' ) );
	} else {
		$location = '';
	}

/**
	 * Filters the edit link for a term.
	 *
	 * @since 3.1.0
	 *
	 * @param string $location    The edit link.
	 * @param int    $term_id     Term ID.
	 * @param string $taxonomy    Taxonomy name.
	 * @param string $object_type The object type.
	 */
	return apply_filters( 'get_edit_term_link', $location, $term_id, $taxonomy, $object_type );
}

/**
 * Displays or retrieves the edit term link with formatting.
 *
 * @since 3.1.0
 *
 * @param string           $link    Optional. Anchor text. If empty, default is 'Edit This'. Default empty.
 * @param string           $before  Optional. Display before edit link. Default empty.
 * @param string           $after   Optional. Display after edit link. Default empty.
 * @param int|WP_Term|null $term    Optional. Term ID or object. If null, the queried object will be inspected. Default null.
 * @param bool             $display Optional. Whether or not to echo the return. Default true.
 * @return string|void HTML content.
 */
function edit_term_link( $link = '', $before = '', $after = '', $term = null, $display = true ) {
	if ( is_null( $term ) ) {
		$term = get_queried_object();
	} else {
		$term = get_term( $term );
	}

if ( ! $term ) {
		return;
	}

$tax = get_taxonomy( $term->taxonomy );
	if ( ! current_user_can( 'edit_term', $term->term_id ) ) {
		return;
	}

if ( empty( $link ) ) {
		$link = __( 'Edit This' );
	}

$link = '<a href="' . get_edit_term_link( $term->term_id, $term->taxonomy ) . '">' . $link . '</a>';

/**
	 * Filters the anchor tag for the edit link of a term.
	 *
	 * @since 3.1.0
	 *
	 * @param string $link    The anchor tag for the edit link.
	 * @param int    $term_id Term ID.
	 */
	$link = $before . apply_filters( 'edit_term_link', $link, $term->term_id ) . $after;

if ( $display ) {
		echo $link;
	} else {
		return $link;
	}
}

/**
 * Retrieves the permalink for a search.
 *
 * @since 3.0.0
 *
 * @global WP_Rewrite $wp_rewrite WordPress rewrite component.
 *
 * @param string $query Optional. The query string to use. If empty the current query is used. Default empty.
 * @return string The search permalink.
 */
function get_search_link( $query = '' ) {
	global $wp_rewrite;

if ( empty( $query ) ) {
		$search = get_search_query( false );
	} else {
		$search = stripslashes( $query );
	}

$permastruct = $wp_rewrite->get_search_permastruct();

if ( empty( $permastruct ) ) {
		$link = home_url( '?s=' . urlencode( $search ) );
	} else {
		$search = urlencode( $search );
		$search = str_replace( '%2F', '/', $search ); // %2F(/) is not valid within a URL, send it un-encoded.
		$link   = str_replace( '%search%', $search, $permastruct );
		$link   = home_url( user_trailingslashit( $link, 'search' ) );
	}

/**
	 * Filters the search permalink.
	 *
	 * @since 3.0.0
	 *
	 * @param string $link   Search permalink.
	 * @param string $search The URL-encoded search term.
	 */
	return apply_filters( 'search_link', $link, $search );
}

/**
 * Retrieves the permalink for the search results feed.
 *
 * @since 2.5.0
 *
 * @global WP_Rewrite $wp_rewrite WordPress rewrite component.
 *
 * @param string $search_query Optional. Search query. Default empty.
 * @param string $feed         Optional. Feed type. Possible values include 'rss2', 'atom'.
 *                             Default is the value of get_default_feed().
 * @return string The search results feed permalink.
 */
function get_search_feed_link( $search_query = '', $feed = '' ) {
	global $wp_rewrite;
	$link = get_search_link( $search_query );

if ( empty( $feed ) ) {
		$feed = get_default_feed();
	}

$permastruct = $wp_rewrite->get_search_permastruct();

if ( empty( $permastruct ) ) {
		$link = add_query_arg( 'feed', $feed, $link );
	} else {
		$link  = trailingslashit( $link );
		$link .= "feed/$feed/";
	}

/**
	 * Filters the search feed link.
	 *
	 * @since 2.5.0
	 *
	 * @param string $link Search feed link.
	 * @param string $feed Feed type. Possible values include 'rss2', 'atom'.
	 * @param string $type The search type. One of 'posts' or 'comments'.
	 */
	return apply_filters( 'search_feed_link', $link, $feed, 'posts' );
}

/**
 * Retrieves the permalink for the search results comments feed.
 *
 * @since 2.5.0
 *
 * @global WP_Rewrite $wp_rewrite WordPress rewrite component.
 *
 * @param string $search_query Optional. Search query. Default empty.
 * @param string $feed         Optional. Feed type. Possible values include 'rss2', 'atom'.
 *                             Default is the value of get_default_feed().
 * @return string The comments feed search results permalink.
 */
function get_search_comments_feed_link( $search_query = '', $feed = '' ) {
	global $wp_rewrite;

if ( empty( $feed ) ) {
		$feed = get_default_feed();
	}

$link = get_search_feed_link( $search_query, $feed );

$permastruct = $wp_rewrite->get_search_permastruct();

if ( empty( $permastruct ) ) {
		$link = add_query_arg( 'feed', 'comments-' . $feed, $link );
	} else {
		$link = add_query_arg( 'withcomments', 1, $link );
	}

/** This filter is documented in wp-includes/link-template.php */
	return apply_filters( 'search_feed_link', $link, $feed, 'comments' );
}

/**
 * Retrieves the permalink for a post type archive.
 *
 * @since 3.1.0
 * @since 4.5.0 Support for posts was added.
 *
 * @global WP_Rewrite $wp_rewrite WordPress rewrite component.
 *
 * @param string $post_type Post type.
 * @return string|false The post type archive permalink. False if the post type
 *                      does not exist or does not have an archive.
 */
function get_post_type_archive_link( $post_type ) {
	global $wp_rewrite;

$post_type_obj = get_post_type_object( $post_type );

if ( ! $post_type_obj ) {
		return false;
	}

if ( 'post' === $post_type ) {
		$show_on_front  = get_option( 'show_on_front' );
		$page_for_posts = get_option( 'page_for_posts' );

if ( 'page' === $show_on_front && $page_for_posts ) {
			$link = get_permalink( $page_for_posts );
		} else {
			$link = get_home_url();
		}
		/** This filter is documented in wp-includes/link-template.php */
		return apply_filters( 'post_type_archive_link', $link, $post_type );
	}

if ( ! $post_type_obj->has_archive ) {
		return false;
	}

if ( get_option( 'permalink_structure' ) && is_array( $post_type_obj->rewrite ) ) {
		$struct = ( true === $post_type_obj->has_archive ) ? $post_type_obj->rewrite['slug'] : $post_type_obj->has_archive;
		if ( $post_type_obj->rewrite['with_front'] ) {
			$struct = $wp_rewrite->front . $struct;
		} else {
			$struct = $wp_rewrite->root . $struct;
		}
		$link = home_url( user_trailingslashit( $struct, 'post_type_archive' ) );
	} else {
		$link = home_url( '?post_type=' . $post_type );
	}

/**
	 * Filters the post type archive permalink.
	 *
	 * @since 3.1.0
	 *
	 * @param string $link      The post type archive permalink.
	 * @param string $post_type Post type name.
	 */
	return apply_filters( 'post_type_archive_link', $link, $post_type );
}

/**
 * Retrieves the permalink for a post type archive feed.
 *
 * @since 3.1.0
 *
 * @param string $post_type Post type.
 * @param string $feed      Optional. Feed type. Possible values include 'rss2', 'atom'.
 *                          Default is the value of get_default_feed().
 * @return string|false The post type feed permalink. False if the post type
 *                      does not exist or does not have an archive.
 */
function get_post_type_archive_feed_link( $post_type, $feed = '' ) {
	$default_feed = get_default_feed();
	if ( empty( $feed ) ) {
		$feed = $default_feed;
	}

$link = get_post_type_archive_link( $post_type );
	if ( ! $link ) {
		return false;
	}

$post_type_obj = get_post_type_object( $post_type );
	if ( get_option( 'permalink_structure' ) && is_array( $post_type_obj->rewrite ) && $post_type_obj->rewrite['feeds'] ) {
		$link  = trailingslashit( $link );
		$link .= 'feed/';
		if ( $feed != $default_feed ) {
			$link .= "$feed/";
		}
	} else {
		$link = add_query_arg( 'feed', $feed, $link );
	}

/**
	 * Filters the post type archive feed link.
	 *
	 * @since 3.1.0
	 *
	 * @param string $link The post type archive feed link.
	 * @param string $feed Feed type. Possible values include 'rss2', 'atom'.
	 */
	return apply_filters( 'post_type_archive_feed_link', $link, $feed );
}

/**
 * Retrieves the URL used for the post preview.
 *
 * Allows additional query args to be appended.
 *
 * @since 4.4.0
 *
 * @param int|WP_Post $post         Optional. Post ID or `WP_Post` object. Defaults to global `$post`.
 * @param array       $query_args   Optional. Array of additional query args to be appended to the link.
 *                                  Default empty array.
 * @param string      $preview_link Optional. Base preview link to be used if it should differ from the
 *                                  post permalink. Default empty.
 * @return string|null URL used for the post preview, or null if the post does not exist.
 */
function get_preview_post_link( $post = null, $query_args = array(), $preview_link = '' ) {
	$post = get_post( $post );

if ( ! $post ) {
		return;
	}

$post_type_object = get_post_type_object( $post->post_type );
	if ( is_post_type_viewable( $post_type_object ) ) {
		if ( ! $preview_link ) {
			$preview_link = set_url_scheme( get_permalink( $post ) );
		}

$query_args['preview'] = 'true';
		$preview_link          = add_query_arg( $query_args, $preview_link );
	}

/**
	 * Filters the URL used for a post preview.
	 *
	 * @since 2.0.5
	 * @since 4.0.0 Added the `$post` parameter.
	 *
	 * @param string  $preview_link URL used for the post preview.
	 * @param WP_Post $post         Post object.
	 */
	return apply_filters( 'preview_post_link', $preview_link, $post );
}

/**
 * Retrieves the edit post link for post.
 *
 * Can be used within the WordPress loop or outside of it. Can be used with
 * pages, posts, attachments, revisions, global styles, templates, and template parts.
 *
 * @since 2.3.0
 * @since 6.3.0 Adds custom link for wp_navigation post types.
 *              Adds custom links for wp_template_part and wp_template post types.
 *
 * @param int|WP_Post $post    Optional. Post ID or post object. Default is the global `$post`.
 * @param string      $context Optional. How to output the '&' character. Default '&'.
 * @return string|null The edit post link for the given post. Null if the post type does not exist
 *                     or does not allow an editing UI.
 */
function get_edit_post_link( $post = 0, $context = 'display' ) {
	$post = get_post( $post );

if ( ! $post ) {
		return;
	}

if ( 'revision' === $post->post_type ) {
		$action = '';
	} elseif ( 'display' === $context ) {
		$action = '&action=edit';
	} else {
		$action = '&action=edit';
	}

$post_type_object = get_post_type_object( $post->post_type );

if ( ! $post_type_object ) {
		return;
	}

if ( ! current_user_can( 'edit_post', $post->ID ) ) {
		return;
	}

$link = '';

if ( 'wp_template' === $post->post_type || 'wp_template_part' === $post->post_type ) {
		$slug = urlencode( get_stylesheet() . '//' . $post->post_name );
		$link = admin_url( sprintf( $post_type_object->_edit_link, $post->post_type, $slug ) );
	} elseif ( 'wp_navigation' === $post->post_type ) {
		$link = admin_url( sprintf( $post_type_object->_edit_link, (string) $post->ID ) );
	} elseif ( $post_type_object->_edit_link ) {
		$link = admin_url( sprintf( $post_type_object->_edit_link . $action, $post->ID ) );
	}

/**
	 * Filters the post edit link.
	 *
	 * @since 2.3.0
	 *
	 * @param string $link    The edit link.
	 *