Composer Installation App Starter Installation & Set Up Upgrading Pros Cons Structure Latest Dev Adding CodeIgniter4 to an Existing Project Set Up Upgrading Pros Cons St...

Database Migrations Migration file names Create a Migration Foreign Keys Database Groups Namespaces Usage Example Command-Line Tools Migration Preferences Class Reference ...

数据库配置 查询构造器 参数解释： 数据库配置 CodeIgniter 有一个配置文件用来保存数据库配置（用户名、密码、数据库名等等），这个配置文件位于 application/config/database.php。You can also set database connection values for specific environm...

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Date Helper Loading this Helper Available Functions Date Helper The Date Helper file contains functions that assist in working withdates. Loading this Helper Available Fun...

Working With Databases Working With Databases CodeIgniter comes with a full-featured and very fast abstracted databaseclass that supports both traditional structures and Query ...

Authentication Recommendations Authentication CodeIgniter intentionally does not provide an internal authentication or authorization class. There are a numberof great third-pa...

Working with Files Getting a File instance Taking Advantage of Spl New Features Moving Files Working with Files CodeIgniter provides a File class that wraps the SplFileInfo...