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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 |
---|---|
2664 | /** |
2665 | * Filters a post's comment count before it is updated in the database. |
2666 | * |
2667 | * @since 4.5.0 |
2668 | * |
2669 | * @param int|null $new The new comment count. Default null. |
2670 | * @param int $old The old comment count. |
2671 | * @param int $post_id Post ID. |
2672 | */ |
2673 | $new = apply_filters( 'pre_wp_update_comment_count_now', null, $old, $post_id ); |
2674 |
|
2675 | if ( is_null( $new ) ) { |
2676 | $new = (int) $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->comments WHERE comment_post_ID = %d AND comment_approved = '1'", $post_id ) ); |
2677 | } else { |
2678 | $new = (int) $new; |
2679 | } |
2680 |
|
2681 | $wpdb->update( $wpdb->posts, array( 'comment_count' => $new ), array( 'ID' => $post_id ) ); |
2682 |
|