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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 |
|---|---|
| 1235 | function delete_post_meta_by_key($post_meta_key) { |
| 1236 | if ( !$post_meta_key ) |
| 1237 | return false; |
| 1238 | |
| 1239 | global $wpdb; |
| 1240 | $post_ids = $wpdb->get_col($wpdb->prepare("SELECT DISTINCT post_id FROM $wpdb->postmeta WHERE meta_key = %s", $post_meta_key)); |
| 1241 | if ( $post_ids ) { |
| 1242 | $postmetaids = $wpdb->get_col( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE meta_key = %s", $post_meta_key ) ); |
| 1243 | $in = implode( ',', array_fill(1, count($postmetaids), '%d')); |
| 1244 | do_action( 'delete_postmeta', $postmetaids ); |
| 1245 | $wpdb->query( $wpdb->prepare("DELETE FROM $wpdb->postmeta WHERE meta_id IN($in)", $postmetaids )); |
| 1246 | do_action( 'deleted_postmeta', $postmetaids ); |
| 1247 | foreach ( $post_ids as $post_id ) |
| 1248 | wp_cache_delete($post_id, 'post_meta'); |
| 1249 | return true; |
| 1250 | } |
| 1251 | return false; |
| 1252 | } |
| 1253 | |
| Line | Code |
| 1768 | if ( ! empty($comment_ids) ) { |
| 1769 | do_action( 'delete_comment', $comment_ids ); |
| 1770 | foreach ( $comment_ids as $comment_id ) |
| 1771 | wp_delete_comment( $comment_id, true ); |
| 1772 | do_action( 'deleted_comment', $comment_ids ); |
| 1773 | } |
| 1774 | |
| 1775 | $post_meta_ids = $wpdb->get_col( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE post_id = %d ", $postid )); |
| 1776 | if ( !empty($post_meta_ids) ) { |
| 1777 | do_action( 'delete_postmeta', $post_meta_ids ); |
| 1778 | $in_post_meta_ids = "'" . implode("', '", $post_meta_ids) . "'"; |
| 1779 | $wpdb->query( "DELETE FROM $wpdb->postmeta WHERE meta_id IN($in_post_meta_ids)" ); |
| 1780 | do_action( 'deleted_postmeta', $post_meta_ids ); |
| 1781 | } |
| 1782 | |
| 1783 | do_action( 'delete_post', $postid ); |
| 1784 | $wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->posts WHERE ID = %d", $postid )); |
| 1785 | do_action( 'deleted_post', $postid ); |
| 1786 | |
| Line | Code |
| 3466 | if ( ! empty( $comment_ids ) ) { |
| 3467 | do_action( 'delete_comment', $comment_ids ); |
| 3468 | foreach ( $comment_ids as $comment_id ) |
| 3469 | wp_delete_comment( $comment_id, true ); |
| 3470 | do_action( 'deleted_comment', $comment_ids ); |
| 3471 | } |
| 3472 | |
| 3473 | $post_meta_ids = $wpdb->get_col( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE post_id = %d ", $post_id )); |
| 3474 | if ( !empty($post_meta_ids) ) { |
| 3475 | do_action( 'delete_postmeta', $post_meta_ids ); |
| 3476 | $in_post_meta_ids = "'" . implode("', '", $post_meta_ids) . "'"; |
| 3477 | $wpdb->query( "DELETE FROM $wpdb->postmeta WHERE meta_id IN($in_post_meta_ids)" ); |
| 3478 | do_action( 'deleted_postmeta', $post_meta_ids ); |
| 3479 | } |
| 3480 | |
| 3481 | do_action( 'delete_post', $post_id ); |
| 3482 | $wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->posts WHERE ID = %d", $post_id )); |
| 3483 | do_action( 'deleted_post', $post_id ); |
| 3484 | |