3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = array("one" => 1, "two" => 2, "three" => 3, "four" => 4, "five" => 5); foreach($array as $key => &$val) { $val += 1; } var_dump($array);

preferences:
40.9 ms | 402 KiB | 5 Q