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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 |
|---|---|
| 635 | extract($commentdata, EXTR_SKIP); |
| 636 | |
| 637 | // Simple duplicate check |
| 638 | // expected_slashed ($comment_post_ID, $comment_author, $comment_author_email, $comment_content) |
| 639 | $dupe = "SELECT comment_ID FROM $wpdb->comments WHERE comment_post_ID = '$comment_post_ID' AND comment_approved != 'trash' AND ( comment_author = '$comment_author' "; |
| 640 | if ( $comment_author_email ) |
| 641 | $dupe .= "OR comment_author_email = '$comment_author_email' "; |
| 642 | $dupe .= ") AND comment_content = '$comment_content' LIMIT 1"; |
| 643 | if ( $wpdb->get_var($dupe) ) { |
| 644 | do_action( 'comment_duplicate_trigger', $commentdata ); |
| 645 | if ( defined('DOING_AJAX') ) |
| 646 | die( __('Duplicate comment detected; it looks as though you’ve already said that!') ); |
| 647 | |
| 648 | wp_die( __('Duplicate comment detected; it looks as though you’ve already said that!') ); |
| 649 | } |
| 650 | |
| 651 | do_action( 'check_comment_flood', $comment_author_IP, $comment_author_email, $comment_date_gmt ); |
| 652 | |
| 653 | if ( isset($user_id) && $user_id) { |