3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = array('1', '2', '3'); foreach ($arr as $key=>&$val) { var_dump($arr); $arr[3] = '999'; echo $val."\n"; } unset($val); var_dump($arr);

preferences:
51.07 ms | 402 KiB | 5 Q