Swoole\Request::getBrowser PHP Method

    function getBrowser()
    {
        $sys = $this->server['HTTP_USER_AGENT'];
        if (stripos($sys, "Firefox/") > 0) {
            preg_match("/Firefox\\/([^;)]+)+/i", $sys, $b);
            $exp[0] = "Firefox";
            $exp[1] = $b[1];
        } elseif (stripos($sys, "Maxthon") > 0) {
            preg_match("/Maxthon\\/([\\d\\.]+)/", $sys, $aoyou);
            $exp[0] = "傲游";
            $exp[1] = $aoyou[1];
        } elseif (stripos($sys, "MSIE") > 0) {
            preg_match("/MSIE\\s+([^;)]+)+/i", $sys, $ie);
            $exp[0] = "IE";
            $exp[1] = $ie[1];
        } elseif (stripos($sys, "OPR") > 0) {
            preg_match("/OPR\\/([\\d\\.]+)/", $sys, $opera);
            $exp[0] = "Opera";
            $exp[1] = $opera[1];
        } elseif (stripos($sys, "Edge") > 0) {
            preg_match("/Edge\\/([\\d\\.]+)/", $sys, $Edge);
            $exp[0] = "Edge";
            $exp[1] = $Edge[1];
        } elseif (stripos($sys, "Chrome") > 0) {
            preg_match("/Chrome\\/([\\d\\.]+)/", $sys, $google);
            $exp[0] = "Chrome";
            $exp[1] = $google[1];
        } elseif (stripos($sys, 'rv:') > 0 && stripos($sys, 'Gecko') > 0) {
            preg_match("/rv:([\\d\\.]+)/", $sys, $IE);
            $exp[0] = "IE";
            $exp[1] = $IE[1];
        } else {
            $exp[0] = "Unkown";
            $exp[1] = "";
        }
        return $exp[0] . '(' . $exp[1] . ')';
    }