A more "hair friendly" way to modify an array from within a foreach loop is to just use the array key: foreach($array as $key => $value) { if(s

A more "hair friendly" way to modify an array from within a foreach loop is to just use the array key: foreach($array as $key => $value) { if(someCondition($key)) $array[$key] = someTransformation($value); } or whatever - ie. just use the key to modify the original array directly. It's much easier to read and see what's happening (in my opinion anyway).