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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 |
|---|---|
| 617 | * Filters the ID, if any, of the duplicate comment found when creating a new comment. |
| 618 | * |
| 619 | * Return an empty value from this filter to allow what WP considers a duplicate comment. |
| 620 | * |
| 621 | * @since 4.4.0 |
| 622 | * |
| 623 | * @param int $dupe_id ID of the comment identified as a duplicate. |
| 624 | * @param array $commentdata Data for the comment being created. |
| 625 | */ |
| 626 | $dupe_id = apply_filters( 'duplicate_comment_id', $dupe_id, $commentdata ); |
| 627 | |
| 628 | if ( $dupe_id ) { |
| 629 | /** |
| 630 | * Fires immediately after a duplicate comment is detected. |
| 631 | * |
| 632 | * @since 3.0.0 |
| 633 | * |
| 634 | * @param array $commentdata Comment data. |
| 635 | */ |