Hello,初涉web,问题请教。环境Linpus/Apache/PHP/Mysql,session存储在mysql中.我的理解是:用户每次点击页面后,都要删除过期的session,同时更新该用户对应session的过期时间和value。不知道是这样吗?问题1:用session_set_save_handler('_sess_open', '_sess_close', '_sess_read', '_sess_write', '_sess_destroy', '_sess_gc')设置session处理函数后,用户点击页面时,php会自动调用_sess_write更新过期时间和value吗?问题2:如果不会自动更新,我手动更新session过期时间和value时,value是怎么计算出来的?有标准方法吧。value的值(每次更新都不一样,下面这是一个value,因为论坛限制,中间加了好多空格)形如:c2VjdXJpdHlUb2tlbnxzOjMyOiIxODE3ODkwZjdlOTRjYTd lYzRmYTM0NjYxZWQ4YmE5NSI7Y3VzdG9tZXJzX2hvc3RfYWRkcmVzc3xzOjI1O iJPRkZJQ0VfSVBfVE9fSE9TVF9BRERSRVNTIjtjYXJ0SUR 8czowOiIiO2NhcnR8TzoxMjoic2hvcHBpbmdDYXJ0Ijo3OntzOjg6ImNvbnRl bnRzIjthOjA6e31zOjU6InRvdGFsIjtpOjA7czo2OiJ3ZWl naHQiO2k6MDtzOjEyOiJjb250ZW50X3R5cGUiO2I6MDtzOjE4OiJmcmVlX3Noa XBwaW5nX2l0ZW0iO2k6MDtzOjIwOiJmcmVlX3NoaXBwaW5n X3dlaWdodCI7aTowO3M6MTk6ImZyZWVfc2hpcHBpbmdfcHJpY2UiO2k6MDt9bm F2aWdhdGlvbnxPOjE3OiJuYXZpZ2F0aW9uSGlzdG9yeSI6 Mjp7czo0OiJwYXRoIjthOjE6e2k6MDthOjQ6e3M6NDoicGFnZSI7czo1OiJpbmRl eCI7czo0OiJtb2RlIjtzOjY6Ik5PTlNTTCI7czozOiJnZ XQiO3M6MDoiIjtzOjQ6InBvc3QiO2E6MDp7fX19czo4OiJzbmFwc2hvdCI7YTow Ont9fWNoZWNrX3ZhbGlkfHM6NDoidHJ1ZSI7bGFuZ3V hZ2V8czo4OiJzY2hpbmVzZSI7bGFuZ3VhZ2VzX2lkfHM6MToiMiI7bGFuZ3VhZ2VzX 2NvZGV8czoyOiJnYiI7Y3VycmVuY3l8czozOiJDTlki O3RvZGF5X2lzfHM6MTA6IjIwMTAtMTEtMTgiO3VwZGF0ZUV4cGlyYXRpb25zfGI6M TtzZXNzaW9uX2NvdW50ZXJ8YjoxO2N1c3RvbWVyc19 pcF9hZGRyZXNzfHM6OToiMTI3LjAuMC4xIjs=谢谢。