- symmetric difference
- sym_diff
PHP
$arr1 = array('A', 'B', 'C', 'D');
$arr2 = array('C', 'D', 'E', 'F');
print_r( array_values(array_diff(array_merge($arr1, $arr2), array_intersect($arr1, $arr2))) );
// Array ( [0] => A [1] => B [2] => E [3] => F )
$arr1 = array('A', 'B', 'C', 'D');
$arr2 = array('C', 'D', 'E', 'F');
print_r( array_values(array_diff(array_merge($arr1, $arr2), array_intersect($arr1, $arr2))) );
// Array ( [0] => A [1] => B [2] => E [3] => F )