Our second #ossart entry is dedicated to Stack PHP, a PHP middleware reference implementation by Igor Wiedler, Beau Simensen, and Christoph Hochstrasser. We sent a few teaser images out on Twitter (you're following #ossart, right?) and we got a few guesses! The first person to correctly guess the project this time around was @mwop! Nicely done! Now that PSR-7 under review, Stack PHP may soon be undergoing a transformation into something... different. Follow @stackphp to learn more!