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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 |
|---|---|
| 1468 | return false; |
| 1469 | if ( !$url = wp_get_attachment_url( $post->ID ) ) |
| 1470 | return false; |
| 1471 | |
| 1472 | if ( !$thumb = wp_get_attachment_thumb_file( $post->ID ) ) |
| 1473 | return false; |
| 1474 | |
| 1475 | $url = str_replace(basename($url), basename($thumb), $url); |
| 1476 | |
| 1477 | return apply_filters( 'wp_get_attachment_thumb_url', $url, $post->ID ); |
| 1478 | } |
| 1479 | |
| 1480 | function wp_attachment_is_image( $post_id = 0 ) { |
| 1481 | $post_id = (int) $post_id; |
| 1482 | if ( !$post =& get_post( $post_id ) ) |
| 1483 | return false; |
| 1484 | |
| 1485 | if ( !$file = get_attached_file( $post->ID ) ) |
| 1486 | return false; |