It is a type of events which can be called before and after the execution of a program in CodeIgniter. For example Hooks can be used where we need to check whether a user is logged in or logged out before the execution of controller.

It can be globally enabled or disabled by setting in the application/config/config.php page

It can be defined in application/config/hooks.php page. In CodeIgniter each hook is specified like an array with this prototype:

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