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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 |
---|---|
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 |
|
1254 | /** |
1255 | * Retrieve post meta fields, based on post ID. |
Line | Code |
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 |
|
1787 | if ( 'page' == $post->post_type ) { |
1788 | clean_page_cache($postid); |
1789 |
|
Line | Code |
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 |
|
3485 | $uploadpath = wp_upload_dir(); |
3486 |
|
3487 | if ( ! empty($meta['thumb']) ) { |