3v4l.org

run code in 300+ 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);
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
Array ( [0] => baz [1] => test [2] => a )

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140.62 ms | 407 KiB | 5 Q