Efficient way to match unordered arrays?

[DustyPorViva]

PHP Code:

function comparearrays(arr1,arr2) {
  temp.checklist = arr2.size();
  for (temp.i : arr1) {
    if (i in arr2) {
      checklist--;
      arr2.remove(i);
    } else break;
  }
  return (checklist == 0);
} 


? I dunno, I didn't test it... seems to make sense in my head, however.