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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 |
|---|---|
| 677 | $dupe .= $wpdb->prepare( ") AND comment_content = %s LIMIT 1", wp_unslash( $comment_content ) ); |
| 678 | if ( $wpdb->get_var($dupe) ) { |
| 679 | do_action( 'comment_duplicate_trigger', $commentdata ); |
| 680 | if ( defined('DOING_AJAX') ) |
| 681 | die( __('Duplicate comment detected; it looks as though you’ve already said that!') ); |
| 682 | |
| 683 | wp_die( __('Duplicate comment detected; it looks as though you’ve already said that!') ); |
| 684 | } |
| 685 | |
| 686 | do_action( 'check_comment_flood', $comment_author_IP, $comment_author_email, $comment_date_gmt ); |
| 687 | |
| 688 | if ( ! empty( $user_id ) ) { |
| 689 | $user = get_userdata( $user_id ); |
| 690 | $post_author = $wpdb->get_var($wpdb->prepare("SELECT post_author FROM $wpdb->posts WHERE ID = %d LIMIT 1", $comment_post_ID)); |
| 691 | } |
| 692 | |
| 693 | if ( isset( $user ) && ( $user_id == $post_author || $user->has_cap( 'moderate_comments' ) ) ) { |
| 694 | // The author and the admins get respect. |
| 695 | $approved = 1; |