Online PHP editor | output for Tuvnn

<?php abstract class First(){ const id = __CLASS__; public static function start(){ static::run(new static); } protected static function run(First $instance){ echo __CLASS__, PHP_EOL; $insttance->dynamicRun(); } protected function dynamicRun(){ echo self::id, PHP_EOL, get_class($this); } } class Second extends First(){ const id = __CLASS__; public static function start(){ parent::run(new static); } } Second::start();