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    <p>Create a file called <code>MY_controller.php</code> (the prefix can be edited in config file) in <code>/application/core</code>:</p> <pre><code>&lt;?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); class MY_Controller extends CI_Controller { function __construct() { parent::__construct(); //Initialization code that affects all controllers } } class Public_Controller extends MY_Controller { function __construct() { parent::__construct(); //Initialization code that affects Public controllers. Probably not much needed because everyone can access public. } } class Admin_Controller extends MY_Controller { function __construct() { parent::__construct(); //Initialization code that affects Admin controllers I.E. redirect and die if not logged in or not an admin } } class Member_Controller extends MY_Controller { function __construct() { parent::__construct(); //Initialization code that affects Member controllers. I.E. redirect and die if not logged in } } </code></pre> <p>Then anytime you create a new controller, you decide what access it requires</p> <pre><code> class Book extends Member_Controller { //Code that will be executed, no need to check anywhere if the user is logged in. //The user is guaranteed to be logged in if we are executing code here. //If you define a __construct() here, remember to call parent::__construct(); } </code></pre> <p>This cuts code duplication a lot, since if you need another member controller other than <code>Book</code> you can just extend the <code>Member_Controller</code>. Instead of having to do the checks in all of them.</p>
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    1. COI understood your answer, this is really follow the DRY and helps me to apply the correct business rule to different group of user. Thank you and @Kemal Kernal so much for your help :)
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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