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@ 2015-04-28T07:09:16Z

<?php

$all = [
    '1',
    '2',
    '3',
    '4',
];

$toAdd = [
    '3',
    '2',
];


$result = array_diff($toAdd, $all);
print_r($result);

Output
Performance
VLD
References
Branches

print_r: documentation ( source)
array_diff: documentation ( source)

preferences:dark modelive preview

44.74 ms | 402 KiB | 5 Q