mirror of
https://github.com/WordPress/WordPress.git
synced 2024-11-18 08:36:04 +01:00
8bcc5969dc
git-svn-id: http://svn.automattic.com/wordpress/trunk@13382 1a063a9b-81f0-0310-95a4-ce76da25c4cd
76 lines
2.2 KiB
PHP
76 lines
2.2 KiB
PHP
<?php
|
|
/**
|
|
* WordPress Post Thumbnail Template Functions.
|
|
*
|
|
* Support for post thumbnails
|
|
* Themes function.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
|
|
*
|
|
* @param int $post_id Optional. Post ID.
|
|
* @return bool Whether post has an image attached.
|
|
*/
|
|
function has_post_thumbnail( $post_id = NULL ) {
|
|
global $id;
|
|
$post_id = ( NULL === $post_id ) ? $id : $post_id;
|
|
return !! get_post_thumbnail_id( $post_id );
|
|
}
|
|
|
|
/**
|
|
* Retrieve Post Thumbnail ID.
|
|
*
|
|
* @since 2.9.0
|
|
*
|
|
* @param int $post_id Optional. Post ID.
|
|
* @return int
|
|
*/
|
|
function get_post_thumbnail_id( $post_id = NULL ) {
|
|
global $id;
|
|
$post_id = ( NULL === $post_id ) ? $id : $post_id;
|
|
return get_post_meta( $post_id, '_thumbnail_id', true );
|
|
}
|
|
|
|
/**
|
|
* Display Post Thumbnail.
|
|
*
|
|
* @since 2.9.0
|
|
*
|
|
* @param int $size Optional. Image size. Defaults to 'post-thumbnail', which theme sets using set_post_thumbnail_size( $width, $height, $crop_flag );.
|
|
* @param string|array $attr Optional. Query string or array of attributes.
|
|
*/
|
|
function the_post_thumbnail( $size = 'post-thumbnail', $attr = '' ) {
|
|
echo get_the_post_thumbnail( NULL, $size, $attr );
|
|
}
|
|
|
|
/**
|
|
* Retrieve Post Thumbnail.
|
|
*
|
|
* @since 2.9.0
|
|
*
|
|
* @param int $post_id Optional. Post ID.
|
|
* @param string $size Optional. Image size. Defaults to 'thumbnail'.
|
|
* @param string|array $attr Optional. Query string or array of attributes.
|
|
*/
|
|
function get_the_post_thumbnail( $post_id = NULL, $size = 'post-thumbnail', $attr = '' ) {
|
|
global $id;
|
|
$post_id = ( NULL === $post_id ) ? $id : $post_id;
|
|
$post_thumbnail_id = get_post_thumbnail_id( $post_id );
|
|
$size = apply_filters( 'post_thumbnail_size', $size );
|
|
if ( $post_thumbnail_id ) {
|
|
do_action( 'begin_fetch_post_thumbnail_html', $post_id, $post_thumbnail_id, $size ); // for "Just In Time" filtering of all of wp_get_attachment_image()'s filters
|
|
$html = wp_get_attachment_image( $post_thumbnail_id, $size, false, $attr );
|
|
do_action( 'end_fetch_post_thumbnail_html', $post_id, $post_thumbnail_id, $size );
|
|
} else {
|
|
$html = '';
|
|
}
|
|
return apply_filters( 'post_thumbnail_html', $html, $post_id, $post_thumbnail_id, $size, $attr );
|
|
}
|
|
|
|
?>
|