3v4l.org

run code in 300+ PHP versions simultaneously
<?php function foo(array $p, array $q): array { $r = [array_shift($p)]; foreach ($q as $x) { $r[] = $x; $r[] = array_shift($p); } return $r; } print_r( foo([210,11,12], ['-', '/']) ); print_r( foo([210,11,12,12], ['-','/','/']) );
Output for 7.1.25 - 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 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
Array ( [0] => 210 [1] => - [2] => 11 [3] => / [4] => 12 ) Array ( [0] => 210 [1] => - [2] => 11 [3] => / [4] => 12 [5] => / [6] => 12 )
preferences:
157.9 ms | 408 KiB | 5 Q