Please refer to the upgrade instructions corresponding to your installation method.

CodeIgniter features wrappers around some of the most popular forms of fast and dynamic caching. All but file-based caching require specific server requirements, and a Fatal Exception will be thrown ...

BCC Batch Mode, enabling large email lists to be broken into small BCC batches. Sending email is not only simple, but you can configure it on the fly or set your preferences in the ...

The Session class permits you to maintain a user’s “state” and track their activity while they browse your site. CodeIgniter comes with a few session storage drivers, that you can see in the last ...

CodeIgniter provides an object oriented solution for working with URI’s in your application. Using this makes it simple to ensure that the structure is always correct, no matter how complex the URI ...

The Database Utility Class contains methods that help you manage your database.

This helper is automatically loaded by the framework on every request. Since v4.3.0, if you set Config\App::$allowedHostnames, this returns the URL with the hostname ...

If you don’t know what version of CodeIgniter you are currently running, you can get it from the Debug Toolbar, or simply echo the constant \CodeIgniter\CodeIgniter::CI_VERSION.

CodeIgniter gives you access to a Query Builder class. This pattern allows information to be retrieved, inserted, and updated in your database with minimal scripting. In some cases only one or two ...

The CodeIgniter’s Model provides convenience features and additional functionality that people commonly use to make working with a single table in your database more convenient. It comes out of the ...

The Form Helper file contains functions that assist in working with forms.

The Response class extends the HTTP Message Class with methods only appropriate for a server responding to the client that called it.