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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 |
|---|---|
| 764 | $dupe .= $wpdb->prepare( ") AND comment_content = %s LIMIT 1", wp_unslash( $comment_content ) ); |
| 765 | if ( $wpdb->get_var($dupe) ) { |
| 766 | /** |
| 767 | * Fires immediately after a duplicate comment is detected. |
| 768 | * |
| 769 | * @since 3.0.0 |
| 770 | * |
| 771 | * @param array $commentdata Comment data. |
| 772 | */ |
| 773 | do_action( 'comment_duplicate_trigger', $commentdata ); |
| 774 | if ( defined('DOING_AJAX') ) |
| 775 | die( __('Duplicate comment detected; it looks as though you’ve already said that!') ); |
| 776 | |
| 777 | wp_die( __('Duplicate comment detected; it looks as though you’ve already said that!') ); |
| 778 | } |
| 779 | |
| 780 | /** |
| 781 | * Fires immediately before a comment is marked approved. |
| 782 | * |