3v4l.org

run code in 300+ PHP versions simultaneously
<?php if (PHP < 7) { class String { } }
Output for 7.0.0 - 7.0.1
Fatal error: Cannot use 'String' as class name as it is reserved in /in/DpDih on line 4
Process exited with code 255.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Notice: Use of undefined constant PHP - assumed 'PHP' in /in/DpDih on line 3
preferences:
155.22 ms | 1395 KiB | 36 Q