A comparison is being made:
This is so
$result3 = array_diff($fetchForm, $items['form_id']);
print_r($result3);
Array
(
[0] => 1
[2] => 3
)
$result2 = array_diff($items['form_id'], $fetchForm);
print_r($result2);
Array
(
[1] => 4
)
so
Array
(
[0] => 1
[1] => 3
)
Array
(
[0] => 4
)