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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 |
---|---|
2484 | /** |
2485 | * Filters a post's comment count before it is updated in the database. |
2486 | * |
2487 | * @since 4.5.0 |
2488 | * |
2489 | * @param int $new The new comment count. Default null. |
2490 | * @param int $old The old comment count. |
2491 | * @param int $post_id Post ID. |
2492 | */ |
2493 | $new = apply_filters( 'pre_wp_update_comment_count_now', null, $old, $post_id ); |
2494 |
|
2495 | if ( is_null( $new ) ) { |
2496 | $new = (int) $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->comments WHERE comment_post_ID = %d AND comment_approved = '1'", $post_id ) ); |
2497 | } else { |
2498 | $new = (int) $new; |
2499 | } |
2500 |
|
2501 | $wpdb->update( $wpdb->posts, array( 'comment_count' => $new ), array( 'ID' => $post_id ) ); |
2502 |
|