3v4l.org

run code in 300+ PHP versions simultaneously
<?php namespace Foo; const Bar = 'const'; class Bar { private const BAR = 'class'; public function show(): \Closure { return static function() { echo self::BAR; }; } } (new Bar)->show()();
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
class

preferences:
97.49 ms | 402 KiB | 89 Q