Online PHP editor | refs for 0otZH

<?php $arr1 = array( array('categoryid' => '31', 'itemname' => 'Math - Quiz #1'), array('categoryid' => '33', 'itemname' => 'Math - Quiz #2'), array('categoryid' => '35', 'itemname' => 'Math - Quiz #3'), array('categoryid' => '31', 'itemname' => 'Math - Quiz #4') ); $arr2 = array('categoryid' => '31'); $intersect = array_uintersect($arr1, $arr2, 'compareDeepValue'); print_r($intersect); function compareDeepValue($val1, $val2) { return strcmp($val1['categoryid'], $val2['categoryid']); }