3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php class String { public function __construct() { echo 'hello world!'; } } new String;
based on YWGv5
Output for 7.0.0 - 7.1.7
Fatal error: Cannot use 'String' as class name as it is reserved in /in/gjo39 on line 3
Process exited with code 255.
Output for hhvm-3.15.4
Fatal error: Uncaught Error: Cannot use 'String' as class name as it is reserved in /in/gjo39:3 Stack trace: #0 {main}
Process exited with code 255.
Output for 5.6.0 - 5.6.30
hello world!