3v4l.org

run code in 300+ PHP versions simultaneously
<?php function hello() { echo 'Hello, magic PHP!'; } function getCallback() { return 'hello'; } $result = ${'_'.!$_=getCallback()}();
Output for 7.1.25 - 7.1.28, 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 - 8.3.6
Hello, magic PHP!
preferences:
154.1 ms | 403 KiB | 164 Q