3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = 'foo'; $b = (unset) &$a; var_dump($a, $b);
Output for 5.3.0 - 5.3.28, 5.4.0 - 5.4.25
Parse error: syntax error, unexpected '&' in /in/SCVk7 on line 4
Process exited with code 255.
preferences:
174.89 ms | 1395 KiB | 62 Q