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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 |
---|---|
707 | return false; |
708 |
|
709 | global $wpdb; |
710 | $post_ids = $wpdb->get_col($wpdb->prepare("SELECT DISTINCT post_id FROM $wpdb->postmeta WHERE meta_key = %s", $post_meta_key)); |
711 | if ( $post_ids ) { |
712 | $postmetaids = $wpdb->get_col( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE meta_key = %s", $post_meta_key ) ); |
713 | $in = implode( ',', array_fill(1, count($postmetaids), '%d')); |
714 | do_action( 'delete_postmeta', $postmetaids ); |
715 | $wpdb->query( $wpdb->prepare("DELETE FROM $wpdb->postmeta WHERE meta_id IN($in)", $postmetaids )); |
716 | do_action( 'deleted_postmeta', $postmetaids ); |
717 | foreach ( $post_ids as $post_id ) |
718 | wp_cache_delete($post_id, 'post_meta'); |
719 | return true; |
720 | } |
721 | return false; |
722 | } |
723 |
|
724 | /** |
725 | * Retrieve post meta fields, based on post ID. |
Line | Code |
1227 | $wpdb->query( "DELETE FROM $wpdb->comments WHERE comment_ID IN($in_comment_ids)" ); |
1228 | do_action( 'deleted_comment', $comment_ids ); |
1229 | } |
1230 |
|
1231 | $post_meta_ids = $wpdb->get_col( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE post_id = %d ", $postid )); |
1232 | if ( !empty($post_meta_ids) ) { |
1233 | do_action( 'delete_postmeta', $post_meta_ids ); |
1234 | $in_post_meta_ids = "'" . implode("', '", $post_meta_ids) . "'"; |
1235 | $wpdb->query( "DELETE FROM $wpdb->postmeta WHERE meta_id IN($in_post_meta_ids)" ); |
1236 | do_action( 'deleted_postmeta', $post_meta_ids ); |
1237 | } |
1238 |
|
1239 | do_action( 'delete_post', $postid ); |
1240 | $wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->posts WHERE ID = %d", $postid )); |
1241 | do_action( 'deleted_post', $postid ); |
1242 |
|
1243 | if ( 'page' == $post->post_type ) { |
1244 | clean_page_cache($postid); |
1245 |
|
Line | Code |
2863 | $wpdb->query( "DELETE FROM $wpdb->comments WHERE comment_ID IN($in_comment_ids)" ); |
2864 | do_action( 'deleted_comment', $comment_ids ); |
2865 | } |
2866 |
|
2867 | $post_meta_ids = $wpdb->get_col( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE post_id = %d ", $post_id )); |
2868 | if ( !empty($post_meta_ids) ) { |
2869 | do_action( 'delete_postmeta', $post_meta_ids ); |
2870 | $in_post_meta_ids = "'" . implode("', '", $post_meta_ids) . "'"; |
2871 | $wpdb->query( "DELETE FROM $wpdb->postmeta WHERE meta_id IN($in_post_meta_ids)" ); |
2872 | do_action( 'deleted_postmeta', $post_meta_ids ); |
2873 | } |
2874 |
|
2875 | do_action( 'delete_post', $post_id ); |
2876 | $wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->posts WHERE ID = %d", $post_id )); |
2877 | do_action( 'deleted_post', $post_id ); |
2878 |
|
2879 | $uploadpath = wp_upload_dir(); |
2880 |
|
2881 | if ( ! empty($meta['thumb']) ) { |