3v4l.org

run code in 300+ PHP versions simultaneously
<?php $limit = null; while ($limit === null && $limit--) { var_dump($limit ?? 'hi'); }
Output for 8.3.0 - 8.3.6
Warning: Decrement on type null has no effect, this will change in the next major version of PHP in /in/ZRdaW on line 5
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18
Output for 5.5.0 - 5.5.36, 5.6.0 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/ZRdaW on line 6
Process exited with code 255.
preferences:
202.82 ms | 402 KiB | 217 Q