Cross-site scripting (XSS) is a way of injecting malicious JavaScript code into the application. This type of exploit can be used to hijack a user's cookie, which can effectively let the user who injected the code take the ID of any user on the website, simply by linking them to the site with the code added in.

pagination refers to the system of numbering pages a list of numbered links usually found at the bottom of the pages.

Its goal is to enable to developer projects much faster than developers writing code from scratch, by providing a rich set of libraries for commonly needed tasks.

Codeigniter supports flash data, data that is only available for one server request, and is than removed. Flash data is very useful, and is usually used for informational massages.

Form validation is an important part of any application. It is important that have rules that should be adhered and also helps to keep a layer secure.