3v4l.org

run code in 300+ PHP versions simultaneously
<?php class String { }
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.28, 7.2.0 - 7.2.18, 7.3.0 - 7.3.5, 8.0.1 - 8.0.18
Fatal error: Cannot use 'String' as class name as it is reserved in /in/YWGv5 on line 3
Process exited with code 255.
Output for 5.6.0 - 5.6.40
preferences:
238.53 ms | 1395 KiB | 138 Q