3v4l.org

run code in 500+ PHP versions simultaneously
<?php $array = [ ['foo' => 'a', 'bar' => 1], ['foo' => 'b', 'bar' => 2], ]; foreach ($array as $x => ['new' => &$x]); var_export($array);

preferences:
61.67 ms | 993 KiB | 5 Q