3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr1 = [["a"], ["b"], ["c"], ["d"], ["e"]]; $arr2 = [1,2]; $count = count($arr2); foreach ($arr1 as $i => [1 => &$v]) { $v = $arr2[$i % $count]; } var_export($arr1);

preferences:
35.37 ms | 404 KiB | 5 Q