Silex minify HTML middleware

minify-middleware.php

<?php

$app->after(function (\Symfony\Component\HttpFoundation\Request $request, \Symfony\Component\HttpFoundation\Response $response) use ($app) {
	if ($app['debug']) return;

	$search = array(
		'#\/\*.+?\*\/#', // /* JS Comments */
		'#^\s+\/\/.+#m', // // JS Comments
		'/<!--.+?-->/', // <!-- HTML Comments -->
		'/\n/',
		'/\>[^\S ]+/s',
		'/[^\S ]+\</s',
		'/(\s)+/s'
	);

	$replace = array(
		'',
		'',
		'',
		' ',
		'>',
		'<',
		'\\1'
	);

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