3v4l.org

run code in 300+ PHP versions simultaneously
<?php $found = null; $people = array(3,20,2); $criminals = array( 2, 4, 8, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20); $fastfind = array_intersect($people,$criminals); var_dump($fastfind);
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 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 - 8.1.31, 8.2.0 - 8.2.26, 8.3.0 - 8.3.15, 8.4.1 - 8.4.2
array(2) { [1]=> int(20) [2]=> int(2) }
preferences:
59.76 ms | 408 KiB | 5 Q