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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.
| Line | Code |
|---|---|
| 2398 | if ( !EMPTY_TRASH_DAYS ) |
| 2399 | return wp_delete_post($post_id, true); |
| 2400 | |
| 2401 | if ( !$post = get_post($post_id, ARRAY_A) ) |
| 2402 | return $post; |
| 2403 | |
| 2404 | if ( $post['post_status'] == 'trash' ) |
| 2405 | return false; |
| 2406 | |
| 2407 | do_action('wp_trash_post', $post_id); |
| 2408 | |
| 2409 | add_post_meta($post_id,'_wp_trash_meta_status', $post['post_status']); |
| 2410 | add_post_meta($post_id,'_wp_trash_meta_time', time()); |
| 2411 | |
| 2412 | $post['post_status'] = 'trash'; |
| 2413 | wp_insert_post($post); |
| 2414 | |
| 2415 | wp_trash_post_comments($post_id); |
| 2416 | |