In PHP, how can I find elements in one array that are not in another?

Question

Is there a php function, similar to array_merge, that does the exact opposite? In other words, I have two arrays. I would like to remove any value that exists in the second

Answer 1

 $array1 = array(1, 2, 3, 4, 5);
 $array2 = array(2, 4, 5);
 $result = array_diff($array1, $array2);