3v4l.org

run code in 300+ PHP versions simultaneously
<?php $b = [1, 2, 3]; foreach($b ?: [] as &$v){ $v = $v*2; unset($v); } var_dump($b);

This is an error 500

Value for `_results` contains invalid data `array`


preferences:
168.46 ms | 2717 KiB | 11 Q