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    <p>My suggestion is to tuck your validation rules into a separate file. CodeIgniter supports this by allowing you to save validation configurations in <code>config/form_validation.php</code>. Take a look at the <a href="http://codeigniter.com/user_guide/libraries/form_validation.html" rel="nofollow">Form Validation Documentation</a>, specifically the section labelled <strong>Saving Sets of Validation Rules to a Config File.</strong></p> <h2>Your controller's index:</h2> <pre><code>public function index() { $this-&gt;load-&gt;library('form_validation'); if($this-&gt;form_validation-&gt;run('submit_registration') == FALSE) { $this-&gt;load-&gt;view('registration'); } else{ $this-&gt;registration_model-&gt;add_user(); } } </code></pre> <h2>config/form_validation.php</h2> <pre><code>$config = array ( 'submit_registration' =&gt; array ( array( 'field' =&gt; 'email', 'label' =&gt; 'Email', 'rules' =&gt; 'trim|required|valid_email|email_available' ), array( 'field' =&gt; 'username', 'label' =&gt; 'Username', 'rules' =&gt; 'required|alpha_numeric|etc' ) ), 'some_other_submission' =&gt; array( array( 'field' =&gt; 'somefield', 'label' =&gt; 'SomeField', 'rules' =&gt; 'some|rules' ), array( 'field' =&gt; 'getit', 'label' =&gt; 'Get The Point?', 'rules' =&gt; 'trim' ) ) ); </code></pre> <h2>libraries/MY_Form_validation.php</h2> <pre><code>class MY_Form_validation extends CI_Form_validation { function __construct($config = array()){ parent::__construct($config); } function email_available($email){ $CI =&amp; get_instance(); //check your database with the $CI variable... if(email_exists) return TRUE; else return FALSE; } } </code></pre>
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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.

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