3v4l.org

run code in 500+ PHP versions simultaneously
<?php error_reporting(E_ALL ^ E_DEPRECATED); class Callback { use CallbackTrait; public function __construct() {} } trait CallbackTrait { public function callback() { echo 'this is called'; } } new Callback();
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.31, 8.3.0 - 8.3.31, 8.4.1 - 8.4.22, 8.5.0 - 8.5.7
Output for 7.1.25 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Fatal error: Callback has colliding constructor definitions coming from traits in /in/nbh6X on line 5
Process exited with code 255.
preferences:
94.26 ms | 1502 KiB | 4 Q