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run code in 300+ PHP versions simultaneously
<?php $a = ['a', 'b', 'c', 'd']; $b = ['b', 'c', 'd', 'e', 'f']; var_dump(array_intersect($a, $b));
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.30, 8.0.0 - 8.0.20, 8.1.0 - 8.1.7
array(3) { [1]=> string(1) "b" [2]=> string(1) "c" [3]=> string(1) "d" }

preferences:
52.89 ms | 409 KiB | 5 Q