array diff solution

1PHP function array_diff(array $array1, array $array2, array ...$_) int[]
2------------------------------------------------------------------------  
3Computes the difference of arrays
4  
5Parameters:
6array--$array1--The array to compare from
7array--$array2--An array to compare against
8array--...$_--[optional]
9  
10Returns:an array containing all the entries from array1 that are not present in any of the other arrays.