/**

     * 获取ip

     */

    public static function getIp()

    {

        if (getenv('HTTP_CLIENT_IP')) {

            $ip = getenv('HTTP_CLIENT_IP');

        } else if (getenv('HTTP_X_FORWARDED_FOR')) {

            $ip = getenv('HTTP_X_FORWARDED_FOR');

        } else if (getenv('REMOTE_ADDR')) {

            $ip = getenv('REMOTE_ADDR');

        } else {

            $ip = $_SERVER['REMOTE_ADDR'];

        }

        $ips = explode(',', $ip);

        if (count($ips) > 1) {

            $ip = $ips[0];

        }

        return $ip;

    }

/**

     * 获取客户端浏览器

     */

    public static function getBrowse()

    {

        if (isset($_SERVER['HTTP_USER_AGENT'])) {

            $userAgent = strtolower($_SERVER['HTTP_USER_AGENT']);

        } else {

            $userAgent = 'unknown';

        }

        $browser = 'other';

        if (preg_match('/MSIE/i', $userAgent)) {

            $browser = 'ie';

        } else if (preg_match('/Firefox/i', $userAgent)) {

            $browser = 'Firefox';

        } else if (preg_match('/Chrome/i', $userAgent)) {

            $browser = 'chrome';

        } else if (preg_match('/Safari/i', $userAgent)) {

            $browser = 'safari';

        } else if (preg_match('/Opera/i', $userAgent)) {

            $browser = 'opera';

        }

        return $browser;

    }

/**

     * 获取客户端访问操作系统

     */

    public static function getOs()

    {

        if (isset($_SERVER['HTTP_USER_AGENT'])) {

            $userAgent = strtolower($_SERVER['HTTP_USER_AGENT']);

        } else {

            $userAgent = 'unknown';

        }

        $os = 'web';

        if (preg_match('/iphone/i', $userAgent)) {

            $os = 'iphone';

        } else if (preg_match('/android/i', $userAgent)) {

            $os = 'android';

        } else if (preg_match('/ipad/i', $userAgent)) {

            $os = 'ipad';

        } else if (preg_match('/win/i', $userAgent)) {

            $os = 'windows';

        } else if (preg_match('/mac/i', $userAgent)) {

            $os = 'mac';

        } else if (preg_match('/linux/i', $userAgent)) {

            $os = 'linux';

        } else if (preg_match('/unix/i', $userAgent)) {

            $os = 'unix';

        } else if (preg_match('/bsd/i', $userAgent)) {

            $os = 'bsd';

        }

        return $os;

    }

    /**

     * 获取客户端访问设备

     */

    public static function getDevice()

    {

        if (isset($_SERVER['HTTP_USER_AGENT'])) {

            $userAgent = strtolower($_SERVER['HTTP_USER_AGENT']);

        } else {

            $userAgent = 'unknown';

        }

        $device = 'pc';

        if (preg_match('/iphone/i', $userAgent)) {

            $device = 'phone';

        } else if (preg_match('/android/i', $userAgent)) {

            $device = 'phone';

        } else if (preg_match('/ipad/i', $userAgent)) {

            $device = 'pad';

        } else if (preg_match('/win/i', $userAgent)) {

            $device = 'pc';

        } else if (preg_match('/mac/i', $userAgent)) {

            $device = 'pc';

        } else if (preg_match('/linux/i', $userAgent)) {

            $device = 'pc';

        } else if (preg_match('/unix/i', $userAgent)) {

            $device = 'pc';

        } else if (preg_match('/bsd/i', $userAgent)) {

            $device = 'pc';

        }

        return $device;

    }