3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Bar {}; class Bla {}; class Foo extends Bla {}; $foo = new Foo(); var_dump(is_subclass_of($foo, 'Bar'));
Output for 7.0.0 - 7.0.20, 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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
bool(false)

preferences:
134.69 ms | 403 KiB | 212 Q