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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.
This hook occurs 2 times in this file.
| Line | Code |
|---|---|
| 1388 | |
| 1389 | $wpdb->query("DELETE FROM $wpdb->post2cat WHERE post_id = '$postid'"); |
| 1390 | |
| 1391 | $wpdb->query("DELETE FROM $wpdb->postmeta WHERE post_id = '$postid'"); |
| 1392 | |
| 1393 | if ( ! empty($meta['thumb']) ) { |
| 1394 | // Don't delete the thumb if another attachment uses it |
| 1395 | if (! $wpdb->get_row("SELECT meta_id FROM $wpdb->postmeta WHERE meta_key = '_wp_attachment_metadata' AND meta_value LIKE '%".$wpdb->escape($meta['thumb'])."%' AND post_id <> $postid")) { |
| 1396 | $thumbfile = str_replace(basename($file), $meta['thumb'], $file); |
| 1397 | $thumbfile = apply_filters('wp_delete_file', $thumbfile); |
| 1398 | @ unlink($thumbfile); |
| 1399 | } |
| 1400 | } |
| 1401 | |
| 1402 | $file = apply_filters('wp_delete_file', $file); |
| 1403 | |
| 1404 | if ( ! empty($file) ) |
| 1405 | @ unlink($file); |
| 1406 | |
| 1407 | do_action('delete_attachment', $postid); |
| 1408 | |
| 1409 | return $post; |
| 1410 | } |
| 1411 | |