wordpressのルート直下に置けばBroken Link Checkerでのリンク切れ記事が解るwebapiファイル

block_posts.php

<?php
require_once(dirname(__FILE__) . '/wp-load.php');

$results = $wpdb->get_results( '
select instances.container_id from wp_blc_links AS links
LEFT JOIN wp_blc_instances AS instances
ON (links.link_id = instances.link_id)
where links.http_code="404"
' );

header("Content-Type: application/json; charset=utf-8");
echo json_encode($results);