111111 cancel test_order 222222 cancel test_order "; $base_arr = explode(',', $base); preg_match_all('#(.*?)#', $xml, $xml_arr); $result_not_xml = array_diff($base_arr, $xml_arr[1]); print_r($base_arr); print_r($xml_arr[1]); print_r ($result_not_xml);