3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo = new class {}; $bar = get_class($foo); $baz = new $bar; var_dump(is_a($foo, $bar), is_a($baz, $bar));
Output for 7.0.0 - 7.0.24, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
bool(true) bool(true)
preferences:
113.95 ms | 404 KiB | 180 Q