How to Create a new Tab in catagogy?

[o0ozinkyo0o]

Hello, I'm a new Prestashop and now i Want to create a new Tab in Catalog name is Example. It's as same as with tab Products. And i created controller file AdminExampleController.php in /controllers/admin and create tab Example in adminstrator interface. But when i click on tab Example it show blank page, nothing content. What's wrong or miss? 

Thanks

code in AdminExampleController.php 

<?php



class AdminExampleControllerCore extends AdminController

{
    
    public function __construct()
    
    {
    
       $this->table = 'example';
    
       $this->className = 'Example';
    
       $this->lang = false;
    
      $this->addRowAction('edit');
    
      $this->addRowAction('delete');
    
       $this->bulk_actions = array('delete' => array('text' => $this->l('Delete selected'), 'confirm' => $this->l('Delete selected items?')));
    
      $this->fieldsDisplay = array(
    
       'id_example' => array('title' => $this->l('ID'), 'align' => 'center', 'width' => 25),
    
       'name' => array('title' => $this->l('Title'), 'width' => 130),
    
      );
    
      parent::__construct();
    
    }
    
    public function renderForm()
    
    {
    
      $this->fields_form = array(
    
       'legend' => array(
    
    	'title' => $this->l('Examples'),
    
    	'image' => '../img/admin/example.gif'
    
       ),
    
       'input' => array(
    
    	array(
    
    	 'type' => 'text',
    
    	 'label' => $this->l('Title:'),
    
    	 'name' => 'name',
    
    	 'size' => 33,
    
    	 'required' => true,
    
    	 'desc' => $this->l('Example name'),
    
    	),
    
       ),
    
       'submit' => array(
    
    	'title' => $this->l('   Save   '),
    
    	'class' => 'button'
    
       )
    
      );
    
    
    
      return parent::renderForm();
    
    }
    


}

Edited November 13, 2013 by o0ozinkyo0o (see edit history)

[vekia]

 

 

But when i click on tab Example it show blank page

turn on error reporting, then you will see what exactly doesnt work