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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 |
---|---|
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 |
|
1516 | /** |
1517 | * Retrieve post meta fields, based on post ID. |
Line | Code |
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 |
|
2045 | if ( 'page' == $post->post_type ) { |
2046 | clean_page_cache($postid); |
2047 |
|
Line | Code |
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 |
|
3812 | $uploadpath = wp_upload_dir(); |
3813 |
|
3814 | if ( ! empty($meta['thumb']) ) { |