3v4l.org

run code in 300+ PHP versions simultaneously
<?php class String { }
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.32, 7.2.0 - 7.2.22, 7.3.0 - 7.3.10
Fatal error: Cannot use 'String' as class name as it is reserved in /in/d7chr on line 3
Process exited with code 255.
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
preferences:
252.88 ms | 1399 KiB | 188 Q