3v4l.org

run code in 300+ PHP versions simultaneously
<?php $userdata='Tzo0OiJVc2VyIjoyOntzOjI6ImlkIjtpOjU7czo1OiJsb2dpbiI7czo4OiJ1c2VybmFtZSI7fQ%3D%3D'; echo base64_decode(urldecode($userdata)); ?>
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
O:4:"User":2:{s:2:"id";i:5;s:5:"login";s:8:"username";}
preferences:
230.22 ms | 403 KiB | 292 Q