3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a1 = ['a' => 0, 'c' => 1, 'e' => 2]; $a2 = ['b' => 3, 'd' => 4, 'f' => 5]; $result = []; while($a1 && $a2) { $result += array_splice($a1, 0, 1) + array_splice($a2, 0, 1); } var_export($result);
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
array ( 'a' => 0, 'b' => 3, 'c' => 1, 'd' => 4, 'e' => 2, 'f' => 5, )
preferences:
143.61 ms | 402 KiB | 121 Q