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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 |
|---|---|
| 2526 | $data = wp_unslash( $commentarr ); |
| 2527 | |
| 2528 | /** |
| 2529 | * Filters the comment content before it is updated in the database. |
| 2530 | * |
| 2531 | * @since 1.5.0 |
| 2532 | * |
| 2533 | * @param string $comment_content The comment data. |
| 2534 | */ |
| 2535 | $data['comment_content'] = apply_filters( 'comment_save_pre', $data['comment_content'] ); |
| 2536 | |
| 2537 | $data['comment_date_gmt'] = get_gmt_from_date( $data['comment_date'] ); |
| 2538 | |
| 2539 | if ( ! isset( $data['comment_approved'] ) ) { |
| 2540 | $data['comment_approved'] = 1; |
| 2541 | } elseif ( 'hold' === $data['comment_approved'] ) { |
| 2542 | $data['comment_approved'] = 0; |
| 2543 | } elseif ( 'approve' === $data['comment_approved'] ) { |
| 2544 | $data['comment_approved'] = 1; |