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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.
This hook occurs 3 times in this file.
| Line | Code |
|---|---|
| 1497 | function delete_post_meta_by_key($post_meta_key) { |
| 1498 | if ( !$post_meta_key ) |
| 1499 | return false; |
| 1500 | |
| 1501 | global $wpdb; |
| 1502 | $post_ids = $wpdb->get_col($wpdb->prepare("SELECT DISTINCT post_id FROM $wpdb->postmeta WHERE meta_key = %s", $post_meta_key)); |
| 1503 | if ( $post_ids ) { |
| 1504 | $postmetaids = $wpdb->get_col( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE meta_key = %s", $post_meta_key ) ); |
| 1505 | $in = implode( ',', array_fill(1, count($postmetaids), '%d')); |
| 1506 | do_action( 'delete_postmeta', $postmetaids ); |
| 1507 | $wpdb->query( $wpdb->prepare("DELETE FROM $wpdb->postmeta WHERE meta_id IN($in)", $postmetaids )); |
| 1508 | do_action( 'deleted_postmeta', $postmetaids ); |
| 1509 | foreach ( $post_ids as $post_id ) |
| 1510 | wp_cache_delete($post_id, 'post_meta'); |
| 1511 | return true; |
| 1512 | } |
| 1513 | return false; |
| 1514 | } |
| 1515 | |
| Line | Code |
| 2026 | if ( ! empty($comment_ids) ) { |
| 2027 | do_action( 'delete_comment', $comment_ids ); |
| 2028 | foreach ( $comment_ids as $comment_id ) |
| 2029 | wp_delete_comment( $comment_id, true ); |
| 2030 | do_action( 'deleted_comment', $comment_ids ); |
| 2031 | } |
| 2032 | |
| 2033 | $post_meta_ids = $wpdb->get_col( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE post_id = %d ", $postid )); |
| 2034 | if ( !empty($post_meta_ids) ) { |
| 2035 | do_action( 'delete_postmeta', $post_meta_ids ); |
| 2036 | $in_post_meta_ids = "'" . implode("', '", $post_meta_ids) . "'"; |
| 2037 | $wpdb->query( "DELETE FROM $wpdb->postmeta WHERE meta_id IN($in_post_meta_ids)" ); |
| 2038 | do_action( 'deleted_postmeta', $post_meta_ids ); |
| 2039 | } |
| 2040 | |
| 2041 | do_action( 'delete_post', $postid ); |
| 2042 | $wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->posts WHERE ID = %d", $postid )); |
| 2043 | do_action( 'deleted_post', $postid ); |
| 2044 | |
| Line | Code |
| 3793 | if ( ! empty( $comment_ids ) ) { |
| 3794 | do_action( 'delete_comment', $comment_ids ); |
| 3795 | foreach ( $comment_ids as $comment_id ) |
| 3796 | wp_delete_comment( $comment_id, true ); |
| 3797 | do_action( 'deleted_comment', $comment_ids ); |
| 3798 | } |
| 3799 | |
| 3800 | $post_meta_ids = $wpdb->get_col( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE post_id = %d ", $post_id )); |
| 3801 | if ( !empty($post_meta_ids) ) { |
| 3802 | do_action( 'delete_postmeta', $post_meta_ids ); |
| 3803 | $in_post_meta_ids = "'" . implode("', '", $post_meta_ids) . "'"; |
| 3804 | $wpdb->query( "DELETE FROM $wpdb->postmeta WHERE meta_id IN($in_post_meta_ids)" ); |
| 3805 | do_action( 'deleted_postmeta', $post_meta_ids ); |
| 3806 | } |
| 3807 | |
| 3808 | do_action( 'delete_post', $post_id ); |
| 3809 | $wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->posts WHERE ID = %d", $post_id )); |
| 3810 | do_action( 'deleted_post', $post_id ); |
| 3811 | |