3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = new class { }; class_alias($a::class, 'foo'); if (true) { class bar extends foo { } }
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Output for 7.4.33
Fatal error: Cannot use ::class with dynamic class name in /in/pDFTL on line 5
Process exited with code 255.
preferences:
119.82 ms | 401 KiB | 90 Q