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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 3 times in this file.
| Line | Code |
|---|---|
| 1468 | return false; |
| 1469 | |
| 1470 | global $wpdb; |
| 1471 | $post_ids = $wpdb->get_col($wpdb->prepare("SELECT DISTINCT post_id FROM $wpdb->postmeta WHERE meta_key = %s", $post_meta_key)); |
| 1472 | if ( $post_ids ) { |
| 1473 | $postmetaids = $wpdb->get_col( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE meta_key = %s", $post_meta_key ) ); |
| 1474 | $in = implode( ',', array_fill(1, count($postmetaids), '%d')); |
| 1475 | do_action( 'delete_postmeta', $postmetaids ); |
| 1476 | $wpdb->query( $wpdb->prepare("DELETE FROM $wpdb->postmeta WHERE meta_id IN($in)", $postmetaids )); |
| 1477 | do_action( 'deleted_postmeta', $postmetaids ); |
| 1478 | foreach ( $post_ids as $post_id ) |
| 1479 | wp_cache_delete($post_id, 'post_meta'); |
| 1480 | return true; |
| 1481 | } |
| 1482 | return false; |
| 1483 | } |
| 1484 | |
| 1485 | /** |
| 1486 | * Retrieve post meta fields, based on post ID. |
| Line | Code |
| 1998 | wp_delete_comment( $comment_id, true ); |
| 1999 | do_action( 'deleted_comment', $comment_ids ); |
| 2000 | } |
| 2001 | |
| 2002 | $post_meta_ids = $wpdb->get_col( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE post_id = %d ", $postid )); |
| 2003 | if ( !empty($post_meta_ids) ) { |
| 2004 | do_action( 'delete_postmeta', $post_meta_ids ); |
| 2005 | $in_post_meta_ids = "'" . implode("', '", $post_meta_ids) . "'"; |
| 2006 | $wpdb->query( "DELETE FROM $wpdb->postmeta WHERE meta_id IN($in_post_meta_ids)" ); |
| 2007 | do_action( 'deleted_postmeta', $post_meta_ids ); |
| 2008 | } |
| 2009 | |
| 2010 | do_action( 'delete_post', $postid ); |
| 2011 | $wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->posts WHERE ID = %d", $postid )); |
| 2012 | do_action( 'deleted_post', $postid ); |
| 2013 | |
| 2014 | if ( 'page' == $post->post_type ) { |
| 2015 | clean_page_cache($postid); |
| 2016 | |
| Line | Code |
| 3711 | wp_delete_comment( $comment_id, true ); |
| 3712 | do_action( 'deleted_comment', $comment_ids ); |
| 3713 | } |
| 3714 | |
| 3715 | $post_meta_ids = $wpdb->get_col( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE post_id = %d ", $post_id )); |
| 3716 | if ( !empty($post_meta_ids) ) { |
| 3717 | do_action( 'delete_postmeta', $post_meta_ids ); |
| 3718 | $in_post_meta_ids = "'" . implode("', '", $post_meta_ids) . "'"; |
| 3719 | $wpdb->query( "DELETE FROM $wpdb->postmeta WHERE meta_id IN($in_post_meta_ids)" ); |
| 3720 | do_action( 'deleted_postmeta', $post_meta_ids ); |
| 3721 | } |
| 3722 | |
| 3723 | do_action( 'delete_post', $post_id ); |
| 3724 | $wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->posts WHERE ID = %d", $post_id )); |
| 3725 | do_action( 'deleted_post', $post_id ); |
| 3726 | |
| 3727 | $uploadpath = wp_upload_dir(); |
| 3728 | |
| 3729 | if ( ! empty($meta['thumb']) ) { |