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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.
| Line | Code |
|---|---|
| 961 | clean_comment_cache($children); |
| 962 | } |
| 963 | |
| 964 | // Delete metadata |
| 965 | $meta_ids = $wpdb->get_col( $wpdb->prepare( "SELECT meta_id FROM $wpdb->commentmeta WHERE comment_id = %d ", $comment_id ) ); |
| 966 | if ( !empty($meta_ids) ) { |
| 967 | do_action( 'delete_commentmeta', $meta_ids ); |
| 968 | $in_meta_ids = "'" . implode("', '", $meta_ids) . "'"; |
| 969 | $wpdb->query( "DELETE FROM $wpdb->commentmeta WHERE meta_id IN ($in_meta_ids)" ); |
| 970 | do_action( 'deleted_commentmeta', $meta_ids ); |
| 971 | } |
| 972 | |
| 973 | if ( ! $wpdb->query( $wpdb->prepare("DELETE FROM $wpdb->comments WHERE comment_ID = %d LIMIT 1", $comment_id) ) ) |
| 974 | return false; |
| 975 | do_action('deleted_comment', $comment_id); |
| 976 | |
| 977 | $post_id = $comment->comment_post_ID; |
| 978 | if ( $post_id && $comment->comment_approved == 1 ) |
| 979 | wp_update_comment_count($post_id); |