生成全局唯一标识符，类似 09315E33-480F-8635-E780-7A8E61FB49AA

来源：互联网发布：党员信仰知乎编辑：程序博客网时间：2024/06/05 01:03

/**     * 生成全局唯一标识符，类似 09315E33-480F-8635-E780-7A8E61FB49AA     * @param null $namespace     * @return string     */    public static function guid($namespace = null)    {        static $guid = '';        $uid = uniqid(mt_rand(), true);        $data = $namespace;        $data .= isset($_SERVER['REQUEST_TIME']) ? $_SERVER['REQUEST_TIME'] : time();                 // 请求那一刻的时间戳        $data .= isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : rand(0, 999999);  // 访问者操作系统信息        $data .= isset($_SERVER['SERVER_ADDR']) ? $_SERVER['SERVER_ADDR'] : rand(0, 999999);          // 服务器IP        $data .= isset($_SERVER['SERVER_PORT']) ? $_SERVER['SERVER_PORT'] : rand(0, 999999);          // 服务器端口号        $data .= isset($_SERVER['REMOTE_ADDR']) ? $_SERVER['REMOTE_ADDR'] : rand(0, 999999);          // 远程IP        $data .= isset($_SERVER['REMOTE_PORT']) ? $_SERVER['REMOTE_PORT'] : rand(0, 999999);          // 远程端口        $hash = strtoupper(hash('ripemd128', $uid . $guid . md5($data)));        $guid = substr($hash, 0, 8) . '-' . substr($hash, 8, 4) . '-' . substr($hash, 12, 4) . '-' . substr($hash, 16, 4) . '-' . substr($hash, 20, 12);        return $guid;    }

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