- var_dump: documentation ( source)
- array_diff: documentation ( source)
<?php
var_dump(array_diff(
[
'q1' => true,
'q2' => true,
'q3' => false,
'q4' => false,
],
[
'q1' => false,
'q2' => true,
'q3' => false,
'q4' => false,
]
));