
---- EXPECTED OUTPUT
*** Testing array_diff_key() : usage variation ***

-- Testing array_diff_key() function with multi dimensional array --
array(1) {
  ["third"]=>
  array(1) {
    [0]=>
    string(4) "zero"
  }
}
array(1) {
  ["fourth"]=>
  array(1) {
    [2]=>
    string(3) "two"
  }
}
===DONE===
---- ACTUAL OUTPUT
Could not open input file: Array
---- FAILED
