<?php use MatthiasMullie\Minify\CSS; class CSSminifierExtended extends CSS { public function getDataHash() { return sha1(json_encode($this->accessProtected($this,'data'))); } private function accessProtected($obj, $prop) { $reflection = new ReflectionClass($obj); $property = $reflection->getProperty($prop); $property->setAccessible(true); return $property->getValue($obj); } }