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<?php
/**
 * WordPress Post Thumbnail Template Functions.
 *
 * Support for post thumbnails.
 * Theme's functions.php must call add_theme_support( 'post-thumbnails' ) to use these.
 *
 * @package WordPress
 * @subpackage Template
 */

/**
 * Check if post has an image attached.
 *
 * @since 2.9.0
 * @since 4.4.0 `$post` can be a post ID or WP_Post object.
 *
 * @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global `$post`.
 * @return bool Whether the post has an image attached.
 */
function has_post_thumbnail( $post = null ) {
	return (bool) get_post_thumbnail_id( $post );
}

/**
 * Retrieve post thumbnail ID.
 *
 * @since 2.9.0
 * @since 4.4.0 `$post` can be a post ID or WP_Post object.
 *
 * @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global `$post`.
 * @return string|int Post thumbnail ID or empty string.
 */
function get_post_thumbnail_id( $post = null ) {
	$post = get_post( $post );
	if ( ! $post ) {
		return '';
	}
	return get_post_meta( $post->ID, '_thumbnail_id', true );
}

/**
 * Display the post thumbnail.
 *
 * When a theme adds 'post-thumbnail' support, a special 'post-thumbnail' image size
 * is registered, which differs from the 'thumbnail' image size managed via the
 * Settings > Media screen.
 *
 * When using the_post_thumbnail() or related functions, the 'post-thumbnail' image
 * size is used by default, though a different size can be specified instead as needed.
 *
 * @since 2.9.0
 *
 * @see get_the_post_thumbnail()
 *
 * @param string|array $size Optional. Image size to use. Accepts any valid image size, or
 *                           an array of width and height values in pixels (in that order).
 *                           Default 'post-thumbnail'.
 * @param string|array $attr Optional. Query string or array of attributes. Default empty.
 */
function the_post_thumbnail( $size = 'post-thumbnail', $attr = '' ) {
	echo get_the_post_thumbnail( null, $size, $attr );
}

/**
 * Update cache for thumbnails in the current loop.
 *
 * @since 3.2.0
 *
 * @global WP_Query $wp_query
 *
 * @param WP_Query $wp_query Optional. A WP_Query instance. Defaults to the $wp_query global.
 */
function update_post_thumbnail_cache( $wp_query = null ) {
	if ( ! $wp_query )
		$wp_query = $GLOBALS['wp_query'];

if ( $wp_query->thumbnails_cached )
		return;

$thumb_ids = array();
	foreach ( $wp_query->posts as $post ) {
		if ( $id = get_post_thumbnail_id( $post->ID ) )
			$thumb_ids[] = $id;
	}

if ( ! empty ( $thumb_ids ) ) {
		_prime_post_caches( $thumb_ids, false, true );
	}

$wp_query->thumbnails_cached = true;
}

/**
 * Retrieve the post thumbnail.
 *
 * When a theme adds 'post-thumbnail' support, a special 'post-thumbnail' image size
 * is registered, which differs from the 'thumbnail' image size managed via the
 * Settings > Media screen.
 *
 * When using the_post_thumbnail() or related functions, the 'post-thumbnail' image
 * size is used by default, though a different size can be specified instead as needed.
 *
 * @since 2.9.0
 * @since 4.4.0 `$post` can be a post ID or WP_Post object.
 *
 * @param int|WP_Post  $post Optional. Post ID or WP_Post object.  Default is global `$post`.
 * @param string|array $size Optional. Image size to use. Accepts any valid image size, or
 *                           an array of width and height values in pixels (in that order).
 *                           Default 'post-thumbnail'.
 * @param string|array $attr Optional. Query string or array of attributes. Default empty.
 * @return string The post thumbnail image tag.
 */
function get_the_post_thumbnail( $post = null, $size = 'post-thumbnail', $attr = '' ) {
	$post = get_post( $post );
	if ( ! $post ) {
		return '';
	}
	$post_thumbnail_id = get_post_thumbnail_id( $post );

/**
	 * Filters the post thumbnail size.
	 *
	 * @since 2.9.0
	 * @since 4.9.0 Added the `$post_id` parameter.
	 *
	 * @param string|array $size    The post thumbnail size. Image size or array of width and height
	 *                              values (in that order). Default 'post-thumbnail'.
	 * @param int          $post_id The post ID.
	 */
	$size = apply_filters( 'post_thumbnail_size', $size, $post->ID );

if ( $post_thumbnail_id ) {

/**
		 * Fires before fetching the post thumbnail HTML.
		 *
		 * Provides "just in time" filtering of all filters in wp_get_attachment_image().
		 *
		 * @since 2.9.0
		 *
		 * @param int          $post_id           The post ID.
		 * @param string       $post_thumbnail_id The post thumbnail ID.
		 * @param string|array $size              The post thumbnail size. Image size or array of width
		 *                                        and height values (in that order). Default 'post-thumbnail'.
		 */
		do_action( 'begin_fetch_post_thumbnail_html', $post->ID, $post_thumbnail_id, $size );
		if ( in_the_loop() )
			update_post_thumbnail_cache();
		$html = wp_get_attachment_image( $post_thumbnail_id, $size, false, $attr );

/**
		 * Fires after fetching the post thumbnail HTML.
		 *
		 * @since 2.9.0
		 *
		 * @param int          $post_id           The post ID.
		 * @param string       $post_thumbnail_id The post thumbnail ID.
		 * @param string|array $size              The post thumbnail size. Image size or array of width
		 *                                        and height values (in that order). Default 'post-thumbnail'.
		 */
		do_action( 'end_fetch_post_thumbnail_html', $post->ID, $post_thumbnail_id, $size );

} else {
		$html = '';
	}
	/**
	 * Filters the post thumbnail HTML.
	 *
	 * @since 2.9.0
	 *
	 * @param string       $html              The post thumbnail HTML.
	 * @param int          $post_id           The post ID.
	 * @param string       $post_thumbnail_id The post thumbnail ID.
	 * @param string|array $size              The post thumbnail size. Image size or array of width and height
	 *                                        values (in that order). Default 'post-thumbnail'.
	 * @param string       $attr              Query string of attributes.
	 */
	return apply_filters( 'post_thumbnail_html', $html, $post->ID, $post_thumbnail_id, $size, $attr );
}

/**
 * Return the post thumbnail URL.
 *
 * @since 4.4.0
 *
 * @param int|WP_Post  $post Optional. Post ID or WP_Post object.  Default is global `$post`.
 * @param string|array $size Optional. Registered image size to retrieve the source for or a flat
 *                           array of height and width dimensions. Default 'post-thumbnail'.
 * @return string|false Post thumbnail URL or false if no URL is available.
 */
function get_the_post_thumbnail_url( $post = null, $size = 'post-thumbnail' ) {
	$post_thumbnail_id = get_post_thumbnail_id( $post );
	if ( ! $post_thumbnail_id ) {
		return false;
	}
	return wp_get_attachment_image_url( $post_thumbnail_id, $size );
}

/**
 * Display the post thumbnail URL.
 *
 * @since 4.4.0
 *
 * @param string|array $size Optional. Image size to use. Accepts any valid image size,
 *                           or an array of width and height values in pixels (in that order).
 *                           Default 'post-thumbnail'.
 */
function the_post_thumbnail_url( $size = 'post-thumbnail' ) {
	$url = get_the_post_thumbnail_url( null, $size );
	if ( $url ) {
		echo esc_url( $url );
	}
}

/**
 * Returns the post thumbnail caption.
 *
 * @since 4.6.0
 *
 * @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global `$post`.
 * @return string Post thumbnail caption.
 */
function get_the_post_thumbnail_caption( $post = null ) {
	$post_thumbnail_id = get_post_thumbnail_id( $post );
	if ( ! $post_thumbnail_id ) {
		return '';
	}

$caption = wp_get_attachment_caption( $post_thumbnail_id );

if ( ! $caption ) {
		$caption = '';
	}

return $caption;
}

/**
 * Displays the post thumbnail caption.
 *
 * @since 4.6.0
 *
 * @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global `$post`.
 */
function the_post_thumbnail_caption( $post = null ) {
	/**
	 * Filters the displayed post thumbnail caption.
	 *
	 * @since 4.6.0
	 *
	 * @param string $caption Caption for the given attachment.
	 */
	echo apply_filters( 'the_post_thumbnail_caption', get_the_post_thumbnail_caption( $post ) );
}

Nama File / Folder	Size	Action
ID3	--	NONE
IXR	--	NONE
Requests	--	NONE
SimplePie	--	NONE
Text	--	NONE
certificates	--	NONE
css	--	NONE
customize	--	NONE
fonts	--	NONE
images	--	NONE
js	--	NONE
pomo	--	NONE
random_compat	--	NONE
rest-api	--	NONE
theme-compat	--	NONE
widgets	--	NONE
author-template.php	15.745KB	Edit File Delete File Rename
bookmark-template.php	11.425KB	Edit File Delete File Rename
bookmark.php	13.352KB	Edit File Delete File Rename
canonical.php	26.937KB	Edit File Delete File Rename
category-template.php	50.121KB	Edit File Delete File Rename
category.php	11.703KB	Edit File Delete File Rename
class-http.php	35.316KB	Edit File Delete File Rename
class-phpmailer.php	143.344KB	Edit File Delete File Rename
class-pop3.php	20.429KB	Edit File Delete File Rename
class-smtp.php	38.553KB	Edit File Delete File Rename
class-snoopy.php	36.899KB	Edit File Delete File Rename
class-walker-category.php	6.485KB	Edit File Delete File Rename
class-walker-page-dropdown.php	2.226KB	Edit File Delete File Rename
class-walker-page.php	6.556KB	Edit File Delete File Rename
class-wp-ajax-response.php	4.906KB	Edit File Delete File Rename
class-wp-http-curl.php	11.405KB	Edit File Delete File Rename
class-wp-http-ixr-client.php	3.174KB	Edit File Delete File Rename
class-wp-http-streams.php	14.644KB	Edit File Delete File Rename
class-wp-locale-switcher.php	4.94KB	Edit File Delete File Rename
class-wp-locale.php	14.206KB	Edit File Delete File Rename
class-wp-post-type.php	17.809KB	Edit File Delete File Rename
class-wp-role.php	2.553KB	Edit File Delete File Rename
class-wp-session-tokens.php	7.166KB	Edit File Delete File Rename
class-wp-simplepie-sanitize-kses.php	1.732KB	Edit File Delete File Rename
class-wp-tax-query.php	18.749KB	Edit File Delete File Rename
class-wp-taxonomy.php	9.759KB	Edit File Delete File Rename
class-wp-text-diff-renderer-table.php	14.838KB	Edit File Delete File Rename
class-wp-user-meta-session-tokens.php	2.848KB	Edit File Delete File Rename
class-wp-widget-factory.php	3.658KB	Edit File Delete File Rename
class.wp-scripts.php	13.828KB	Edit File Delete File Rename
cron.php	16.081KB	Edit File Delete File Rename
date.php	34.18KB	Edit File Delete File Rename
default-filters.php	26.517KB	Edit File Delete File Rename
feed-rdf.php	2.607KB	Edit File Delete File Rename
feed.php	19.092KB	Edit File Delete File Rename
functions.wp-scripts.php	11.212KB	Edit File Delete File Rename
general-template.php	135.77KB	Edit File Delete File Rename
kses.php	48.935KB	Edit File Delete File Rename
l10n.php	42.46KB	Edit File Delete File Rename
link-template.php	133.086KB	Edit File Delete File Rename
locale.php	0.138KB	Edit File Delete File Rename
media-template.php	45.033KB	Edit File Delete File Rename
media.php	137.07KB	Edit File Delete File Rename
meta.php	36.598KB	Edit File Delete File Rename
ms-blogs.php	38.263KB	Edit File Delete File Rename
ms-default-filters.php	4.544KB	Edit File Delete File Rename
ms-files.php	2.559KB	Edit File Delete File Rename
nav-menu-template.php	20.382KB	Edit File Delete File Rename
option.php	66.156KB	Edit File Delete File Rename
post-formats.php	6.813KB	Edit File Delete File Rename
post-template.php	57.349KB	Edit File Delete File Rename
post-thumbnail-template.php	8.023KB	Edit File Delete File Rename
post.php	212.527KB	Edit File Delete File Rename
registration.php	0.174KB	Edit File Delete File Rename
revision.php	20.806KB	Edit File Delete File Rename
rewrite.php	17.092KB	Edit File Delete File Rename
script-loader.php	78.28KB	Edit File Delete File Rename
taxonomy.php	145.88KB	Edit File Delete File Rename
vars.php	5.451KB	Edit File Delete File Rename
wlwmanifest.xml	1.021KB	Edit File Delete File Rename