Online PHP editor | output for moH0s

<?php class Foo { protected static ?Foo $instance = null; public static function __callStatic($method, $args) { $instance = self::$instance ?? self::$instance = new static(); return $instance->__call($method, $args); } public function __call($method, $args) { if (method_exists($this, $method)) { return $instance->$method(...$args); } return $this; } protected function bar() { echo __METHOD__ . '<br />'; return $this; } protected function baz() { echo __METHOD__ . '<br />'; return $this; } } Foo::bar()->baz(); (new Foo())->bar()->baz();