/**

 * session管理函数

 * @param string|array $name session名称 如果为数组则表示进行session设置

 * @param mixed $value session值

 * @return mixed

 */

function session($name,$value='') {

    $prefix   =  C('SESSION_PREFIX');

    if(is_array($name)) { // session初始化 在session_start 之前调用

        if(isset($name['prefix'])) C('SESSION_PREFIX',$name['prefix']);

        if(C('VAR_SESSION_ID') && isset($_REQUEST[C('VAR_SESSION_ID')])){

            session_id($_REQUEST[C('VAR_SESSION_ID')]);

        }elseif(isset($name['id'])) {

            session_id($name['id']);

        }

        ini_set('session.auto_start', 0);

        if(isset($name['name']))            session_name($name['name']);

        if(isset($name['path']))            session_save_path($name['path']);

        if(isset($name['domain']))          ini_set('session.cookie_domain', $name['domain']);

        if(isset($name['expire']))          ini_set('session.gc_maxlifetime', $name['expire']);

        if(isset($name['use_trans_sid']))   ini_set('session.use_trans_sid', $name['use_trans_sid']?1:0);

        if(isset($name['use_cookies']))     ini_set('session.use_cookies', $name['use_cookies']?1:0);

        if(isset($name['cache_limiter']))   session_cache_limiter($name['cache_limiter']);

        if(isset($name['cache_expire']))    session_cache_expire($name['cache_expire']);

        if(isset($name['type']))            C('SESSION_TYPE',$name['type']);

        if(C('SESSION_TYPE')) { // 读取session驱动

            $class      = 'Session'. ucwords(strtolower(C('SESSION_TYPE')));

            // 检查驱动类

            if(require_cache(EXTEND_PATH.'Driver/Session/'.$class.'.class.php')) {

                $hander = new $class();

                $hander->execute();

            }else {

                // 类没有定义

    &