protected function checkBrowserPlayStation()
    {
        if (stripos($this->_agent, 'PlayStation ') !== false) {
            $aresult = explode(' ', stristr($this->_agent, 'PlayStation '));
            $this->setBrowser(self::BROWSER_PLAYSTATION);
            if (isset($aresult[0])) {
                $aversion = explode(')', $aresult[2]);
                $this->setVersion($aversion[0]);
                if (stripos($this->_agent, 'Portable)') !== false || stripos($this->_agent, 'Vita') !== false) {
                    $this->setMobile(true);
                }
                return true;
            }
        }
        return false;
    }