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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 |
---|---|
2363 | /** |
2364 | * Filters a post's comment count before it is updated in the database. |
2365 | * |
2366 | * @since 4.5.0 |
2367 | * |
2368 | * @param int $new The new comment count. Default null. |
2369 | * @param int $old The old comment count. |
2370 | * @param int $post_id Post ID. |
2371 | */ |
2372 | $new = apply_filters( 'pre_wp_update_comment_count_now', null, $old, $post_id ); |
2373 |
|
2374 | if ( is_null( $new ) ) { |
2375 | $new = (int) $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->comments WHERE comment_post_ID = %d AND comment_approved = '1'", $post_id ) ); |
2376 | } else { |
2377 | $new = (int) $new; |
2378 | } |
2379 |
|
2380 | $wpdb->update( $wpdb->posts, array('comment_count' => $new), array('ID' => $post_id) ); |
2381 |
|