Online PHP editor | output for U9bcn

<?php $pageids = [ ['id' => 1, 'linklabel' => 'Home', 'url' => 'home'], ['id' => 2, 'linklabel' => 'Graphic Design', 'url' => 'graphicdesign'], ['id' => 3, 'linklabel' => 'Other Design', 'url' => 'otherdesign'], ['id' => 6, 'linklabel' => 'Logo Design', 'url' => 'logodesign'], ['id' => 15, 'linklabel' => 'Content Writing', 'url' => 'contentwriting'], ]; $parentpage = [ ['id' => 2, 'linklabel' => 'Graphic Design', 'url' => 'graphicdesign'], ['url' => 'otherdesign', 'id' => 3, 'linklabel' => 'Other Design'], ]; var_export( array_udiff($pageids, $parentpage, fn($a, $b) => $a <=> $b) );