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

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 ...

As well as calling an applications Controllers via the URL in a browser they can also be loaded via the command-line interface (CLI).

When we use the term “Libraries” we are normally referring to the classes that are located in the libraries directory and described in the Class Reference of this user guide. In this case, however, we ...

Normally the second segment of the URL is reserved for the method name, but in the example above it instead has a product ID. To overcome this, CodeIgniter allows you ...

Before performing an update you should take your site offline by replacing the index.php file with a static one.

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 ...

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 ...

CodeIgniter comes with a Cross Site Scripting prevention filter, which looks for commonly used techniques to trigger JavaScript or other types of code that attempt to hijack cookies or do other ...

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

We take security seriously. CodeIgniter incorporates a number of features and techniques to either enforce good security practices, or to enable you to do so easily. We respect the Open Web ...