3v4l.org

run code in 300+ PHP versions simultaneously
<?php $ids = [ [1,2,3,4], [2,3,4], [3,4,5], ]; $res = array_splice($ids,0,1)[0]; foreach($ids as $id){ $res = array_intersect($res, $id); } var_dump($res);
Output for 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 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
array(2) { [2]=> int(3) [3]=> int(4) }
preferences:
111.43 ms | 1615 KiB | 4 Q