Zebra_cURL::_user_agent PHP Method

    private function _user_agent()
    {
        // browser version: 9 or 10
        $version = rand(9, 10);
        // windows version; here are the meanings:
        // Windows NT 6.2   ->  Windows 8                                       //  can have IE10
        // Windows NT 6.1   ->  Windows 7                                       //  can have IE9 or IE10
        // Windows NT 6.0   ->  Windows Vista                                   //  can have IE9
        $major_version = 6;
        $minor_version = $version == 8 || $version == 9 ? rand(0, 2) : 2;
        // add some extra information
        $extras = rand(0, 3);
        // return the random user agent string
        return 'Mozilla/5.0 (compatible; MSIE ' . $version . '.0; Windows NT ' . $major_version . '.' . $minor_version . ($extras == 1 ? '; WOW64' : ($extras == 2 ? '; Win64; IA64' : ($extras == 3 ? '; Win64; x64' : ''))) . ')';
    }