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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 |
|---|---|
| 833 | ); |
| 834 | if ( $wpdb->get_var( $dupe ) ) { |
| 835 | /** |
| 836 | * Fires immediately after a duplicate comment is detected. |
| 837 | * |
| 838 | * @since 3.0.0 |
| 839 | * |
| 840 | * @param array $commentdata Comment data. |
| 841 | */ |
| 842 | do_action( 'comment_duplicate_trigger', $commentdata ); |
| 843 | if ( defined( 'DOING_AJAX' ) ) { |
| 844 | die( __('Duplicate comment detected; it looks as though you’ve already said that!') ); |
| 845 | } |
| 846 | wp_die( __('Duplicate comment detected; it looks as though you’ve already said that!') ); |
| 847 | } |
| 848 | |
| 849 | /** |
| 850 | * Fires immediately before a comment is marked approved. |
| 851 | * |