--TEST-- basic array_diff_assoc test --FILE-- "green", "b" => "brown", "c" => "blue", "red", ""); $array2 = array("a" => "green", "yellow", "red", TRUE); $array3 = array("red", "a"=>"brown", ""); $result[] = array_diff_assoc($array1, $array2); $result[] = array_diff_assoc($array1, $array3); $result[] = array_diff_assoc($array2, $array3); $result[] = array_diff_assoc($array1, $array2, $array3); print_r($result) ?> --EXPECT-- Array ( [0] => Array ( [b] => brown [c] => blue [0] => red [1] => ) [1] => Array ( [a] => green [b] => brown [c] => blue ) [2] => Array ( [a] => green [0] => yellow [1] => red [2] => 1 ) [3] => Array ( [b] => brown [c] => blue ) )