Online PHP editor | output for VQARq3

<?php function get_calling_scope() { return debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 3)[2]['class'] ?? null; } class Foo { public function __get($name) { var_dump(get_calling_scope()); return ''; } public function test() { $this->bar; } } class Bar extends Foo { public function __get($name) { parent::__get($name); return ''; } } $foo = new Foo(); $foo->bar; $foo->test(); $bar = new Bar(); $bar->test();