Error把一般问题告诉用户，例如不正确的密码、失效的会话等。

Error Informs the user about general problems, for example, incorrect passwords, an expired session, etc.

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这样，它就可以利用应用服务器提供的所有特性，如连接池、分布式会话等。

Thus they can use all the features that the Application Server provides (connection pooling, distributed sessions, and so on).

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ini 文件用于配置 PHP 的行为，比如设置目录、设置文件路径、更改会话等。

The php.ini file is used to configure the PHP behavior, like setting directories, file paths, changing sessions, and so on.

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