phpmyadmin报错原因及解决办法:无法在发生异常时创建会话,请检查 PHP 或网站服务器日志,并正确配置 PHP 安装
phpmyadmin报错原因及解决方法:无法在发生错误时创建会话,请检查 PHP 或网站服务器日志,并正确配置 PHP 安装。
原文地址: http://www.page99.net/tn/archives/323
两天前登录phpmyadmin突然出错了,
“无法在发生错误时创建会话,请检查 PHP 或网站服务器日志,并正确配置 PHP 安装。”
很奇怪前些天一直好好的,怎么就突然不能用了,把phpmyadmin文件拷到另外站点的目录里,运行,居然好了。但原来的目录就是不行。
用过后,就把另外站点里的phpmyadmin删掉了,原来目录里还是坏的,有时间再找原因解决。
今天,又要使用修改一些东西,原来目录里的还是坏的,重新从官方下载最新的3.3.1版上传,还是坏的;传到另外目录里也一样。看来这个问题总是要解决的了。
google了一下,有人说是“打开您的php.ini配置文件session.save_path = “某个路径”检查该项是否配置正确”,大致明白了,估计是phpmyadmin需要写session文件,但session目录没有相应权限所以报错“… 发生错误时创建会话…”,错误信息里说明是session相关的,只是这个错误信息太简略了,不容易轻易看明白。
到服务器上修改php.ini,以前没有配置session.save_path的。于是C盘建一个session目录c:\tempfolder \phpsession,给phpmyadmin站点的web用户赋读写权限,在php.ini里加上一条
session.save_path=”c:\tempfolder\phpsession”
运行iisreset,进入 phpmyadmin站点,终于看到了久违的登录页面了。
分析一下原因,应该是这样的:
windows版的php应该默认使用系统临时文件目录,可能因为别的什么原因,之前有对临时文件目录的权限丢失了,所以就报上面错误
前几天拷到别的站点目录里,而这个站点的iis用户对windows临时文件有读写权限,所以可以正常使用phpmyadmin;今天,那个站点的 iis用户也没权限了,就不行了。
至于网上有人说的,要赋everyone读写权限(甚至还有说赋“完全控制”的权限),就没必要了,只给相应的iis用户赋读写权限就可以;否则还是完全隐患。
顺便说一点,我的phpmyadmin没有放到自己电脑上,远程连接mysql服务器,而是直接把 phpmyadmin放到mysql服务器上,这样正是为了安全其见。mysql的root用户只允许localhost连接,不允许从别的主机上连接。其它用户也是只允许在相应主机上访问。

Reasons for PHPSession failure include configuration errors, cookie issues, and session expiration. 1. Configuration error: Check and set the correct session.save_path. 2.Cookie problem: Make sure the cookie is set correctly. 3.Session expires: Adjust session.gc_maxlifetime value to extend session time.

Methods to debug session problems in PHP include: 1. Check whether the session is started correctly; 2. Verify the delivery of the session ID; 3. Check the storage and reading of session data; 4. Check the server configuration. By outputting session ID and data, viewing session file content, etc., you can effectively diagnose and solve session-related problems.

Multiple calls to session_start() will result in warning messages and possible data overwrites. 1) PHP will issue a warning, prompting that the session has been started. 2) It may cause unexpected overwriting of session data. 3) Use session_status() to check the session status to avoid repeated calls.

Configuring the session lifecycle in PHP can be achieved by setting session.gc_maxlifetime and session.cookie_lifetime. 1) session.gc_maxlifetime controls the survival time of server-side session data, 2) session.cookie_lifetime controls the life cycle of client cookies. When set to 0, the cookie expires when the browser is closed.

The main advantages of using database storage sessions include persistence, scalability, and security. 1. Persistence: Even if the server restarts, the session data can remain unchanged. 2. Scalability: Applicable to distributed systems, ensuring that session data is synchronized between multiple servers. 3. Security: The database provides encrypted storage to protect sensitive information.

Implementing custom session processing in PHP can be done by implementing the SessionHandlerInterface interface. The specific steps include: 1) Creating a class that implements SessionHandlerInterface, such as CustomSessionHandler; 2) Rewriting methods in the interface (such as open, close, read, write, destroy, gc) to define the life cycle and storage method of session data; 3) Register a custom session processor in a PHP script and start the session. This allows data to be stored in media such as MySQL and Redis to improve performance, security and scalability.

SessionID is a mechanism used in web applications to track user session status. 1. It is a randomly generated string used to maintain user's identity information during multiple interactions between the user and the server. 2. The server generates and sends it to the client through cookies or URL parameters to help identify and associate these requests in multiple requests of the user. 3. Generation usually uses random algorithms to ensure uniqueness and unpredictability. 4. In actual development, in-memory databases such as Redis can be used to store session data to improve performance and security.

Managing sessions in stateless environments such as APIs can be achieved by using JWT or cookies. 1. JWT is suitable for statelessness and scalability, but it is large in size when it comes to big data. 2.Cookies are more traditional and easy to implement, but they need to be configured with caution to ensure security.


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