session有关问题
session问题
遇到一个奇怪问题，
session处理。我用的是数据库，但问题就来了。
用户登录信息一直保存不了,跟踪后，发现多次调用session_write(),存入数据库的sql只有第一次数据是对的。然后不使用数据库存储，使用files存储。问题就没有了。似乎是处理session的脚本出了问题，但在本地测试又是好的。只有线上有问题。对照phpinfo打出的session信息，没发现什么不一样。这是什么情况呀？
------解决方案--------------------
关键看你是怎么写入数据库的啊。。你应该没更新最近的session
------解决方案--------------------
写入到数据库时出问题吧
------解决方案--------------------
session_write 中应判断对应的 session_id 是否存在
如存在，就执行 修改 update
否则执行插入 insert
------解决方案--------------------
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