3v4l.org

run code in 500+ PHP versions simultaneously
<?php $a = [ "foo", "bar", "baz", "test" ]; $b = [ "foo", "bar", "a" ]; $res = array_merge(array_diff($a, $b), array_diff($b, $a)); print_r($res);

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86.11 ms | 1449 KiB | 5 Q