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copied!<p>For CodeIgniter one way of going about abstracting the logic is to create a super class as such:</p> <p> <pre><code>class MY_Controller extends CI_Controller { public function __construct() { parent::__construct(); //...do stuff... } //...do stuff... } /* End of file MY_Controller.php */ /* Location: ./application/core/MY_Controller.php */ </code></pre> <p>All your controllers that you want to share the same logic should then extend MY_Controller instead of CI_Controller</p> <p>Now in your MY_Controller you can create functions to "handle incorrect parameters across multiple methods".</p> <p><strong>UPDATE</strong></p> <p>Your controller function params are coming from your route. e.g. <code>mydomain.com/mycontroller/myfunction/param1/param2/</code> would go to the <code>mycontroller</code> <code>public function myfunction($param1, $param2)</code></p> <p><code>$site_id</code> is just your variable naming. You can't tell what it's named and even if you could i doubt it's a good idea to based any logic on how you name your variables.</p> <p>A simple way is just to explicitly call the validating function (stored once in your base controller, a library or a helper) in each controller's function that require it, that gives you fine grain control.</p> <p><strong>UPDATE</strong></p> <pre><code>Extending the controller would only work if my parameters were the same for each method. I'd like to detect automatically the parameters and perform checks. I suppose a call to a helper might be the best I can do, but Id just like to be able to completely abstract it away from the method. I suppose one option would be to have an array of which controllers and methods have $site_id as their first parameter and have a pre_controller hook to do the checking. But this would mean keeping the array up-to-date which kind of defeats the object of my question which is to make things as DRY as possible! </code></pre> <p>Generally, to gain automation you must give up flexibly and follow conventions. so to not go the "use helper" way and to go the auto detect way... create your own convention.</p> <p>in your base controller use $this->uri->segment(n) to check if a certain URL pattern exist, if it does you know that the site_id param is incoming and that you can run automatic validation on it.</p>

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