Online PHP editor | refs for g0dnG

<?php namespace One { class Request { public function getResponse() { return new Response(); } } class Response { public function __construct() { $debug = debug_backtrace(); if (count($debug) < 2 || !isset($debug[1]['class']) || strpos($debug[1]['class'], __NAMESPACE__ . '\\') !== 0) { die('Invalid context'); } echo 'Created' . PHP_EOL; } } } namespace Two { $request = new \One\Request(); $response = $request->getResponse(); // Should work $wrongResponse = new \One\Response(); // Should NOT work }