Online PHP editor | refs for 7Hdll

<?php $arr1 = array(2,3,1,4); $arr2 = array(2,5,3,4); $arr3 = array(1,3,4,2,5,6,3); $range1 = range(1,max($arr1)); $range2 = range(1,max($arr2)); $range3 = range(1,max($arr3)); Var_dump(count($range1) == count(array_intersect($arr1, $range1))); Var_dump(count($range2) == count(array_intersect($arr2, $range2))); Var_dump(count($range3) == count(array_intersect($arr3, $range3)));