if(!function_exists('get_browser_name')) {
    function get_browser_name($agent)
    {
        $u_agent = $agent;
        $bname = 'Unknown';
        $platform = 'Unknown';
        $version = "";

        //First get the platform?
        if (preg_match('/linux/i', $u_agent)) {
            $platform = 'linux';
        } elseif (preg_match('/macintosh|mac os x/i', $u_agent)) {
            $platform = 'mac';
        } elseif (preg_match('/windows|win32/i', $u_agent)) {
            $platform = 'windows';
        }

        // Next get the name of the useragent yes seperately and for good reason
        if (preg_match('/MSIE/i', $u_agent) && !preg_match('/Opera/i', $u_agent)) {
            $bname = 'Internet Explorer';
            $ub = "MSIE";
        } elseif (preg_match('/Trident/i', $u_agent)) { // this condition is for IE11
            $bname = 'Internet Explorer';
            $ub = "rv";
        } elseif (preg_match('/Firefox/i', $u_agent)) {
            $bname = 'Mozilla Firefox';
            $ub = "Firefox";
        } elseif (preg_match('/Chrome/i', $u_agent)) {
            $bname = 'Google Chrome';
            $ub = "Chrome";
        } elseif (preg_match('/Safari/i', $u_agent)) {
            $bname = 'Apple Safari';
            $ub = "Safari";
        } elseif (preg_match('/Opera/i', $u_agent)) {
            $bname = 'Opera';
            $ub = "Opera";
        } elseif (preg_match('/Netscape/i', $u_agent)) {
            $bname = 'Netscape';
            $ub = "Netscape";
        }

        // finally get the correct version number
        // Added "|:"
        $known = array('Version', $ub, 'other');
        $pattern = '#(?<browser>' . join('|', $known) .
            ')[/|: ]+(?<version>[0-9.|a-zA-Z.]*)#';
        if(!preg_match_all($pattern, $u_agent, $matches)) {
            // we have no matching number just continue
        }

        // see how many we have
        $i = count($matches['browser']);
        if ($i != 1) {
            //we will have two since we are not using 'other' argument yet
            //see if version is before or after the name
            if (strripos($u_agent, "Version") < strripos($u_agent, $ub)) {
                $version = $matches['version'][0];
            } else {
                $version = $matches['version'][1];
            }
        } else {
            $version = $matches['version'][0];
        }

        // check if we have a number
        if ($version == null || $version == "") {
            $version = "?";
        }

        return $bname . " " . $version;
    }
}

if(version_compare(phpversion(), '5.3.0', '>=') && defined('G5_BROWSCAP_USE') && G5_BROWSCAP_USE) {
    include_once(G5_BBS_PATH.'/visit_browscap.inc.php');
}
$vi_browser = get_browser_name($user_agent); // 추가하기