Silex minify HTML middleware

middleware.php

<?php

$app->after(function (Request $request, Response $response) use ($app) {
	if ($app['debug']) {
		return;
	}
	
	if (0 === strpos($response->headers->get('Content-Type'), 'text/html')) {
		$search = array('/\n/','/\>[^\S ]+/s','/[^\S ]+\</s','/(\s)+/s');
		$replace = array(' ','>','<','\\1');

		$minified_content = preg_replace($search, $replace, $response->getContent());

		$response->setContent($minified_content);
	}
});