3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a @$no?:'new'; $b @$a?:'more new'; var_dump($a); var_dump($b);
Output for 5.3.0 - 5.3.27, 5.4.0 - 5.4.22
Parse error: syntax error, unexpected '@' in /in/YUsvt on line 3
Process exited with code 255.
preferences:
164.84 ms | 1395 KiB | 58 Q