WP hooks navigation: Home/browse • Actions index • Filters index
To save our bandwidth, we show only a snippet of code around each occurence of the hook. View complete file in SVN (without highlighting).
The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 3978 | $post_id = (int) $post_id; |
| 3979 | if ( !$post =& get_post( $post_id ) ) |
| 3980 | return false; |
| 3981 | if ( !is_array( $imagedata = wp_get_attachment_metadata( $post->ID ) ) ) |
| 3982 | return false; |
| 3983 | |
| 3984 | $file = get_attached_file( $post->ID ); |
| 3985 | |
| 3986 | if ( !empty($imagedata['thumb']) && ($thumbfile = str_replace(basename($file), $imagedata['thumb'], $file)) && file_exists($thumbfile) ) |
| 3987 | return apply_filters( 'wp_get_attachment_thumb_file', $thumbfile, $post->ID ); |
| 3988 | return false; |
| 3989 | } |
| 3990 | |
| 3991 | /** |
| 3992 | * Retrieve URL for an attachment thumbnail. |
| 3993 | * |
| 3994 | * @since 2.1.0 |
| 3995 | * |
| 3996 | * @param int $post_id Attachment ID |