Ok, I cheated, it's not directly PHP ;-) We write PHP extensions with Zephir, which nearly resembles the syntax of PHP and is easy to use like PHP. Need to write faster code than possible with PHP 7? In this talk you will learn what Zephir is, how to install it and how to code simple extension with a nearly PHP like language. After that you are able to write fast algorithms or proprietary/protected code as PHP extensions.