3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(array_diff(['slow', 'pure', '64-bit int'], ['slow'])); var_dump(array_intersect([], ['slow', 'pure', '64-bit int']));
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
array(2) { [1]=> string(4) "pure" [2]=> string(10) "64-bit int" } array(0) { }

preferences:
200.82 ms | 404 KiB | 177 Q