title: How can i add content to the head section of prestashop so it appears where the hookHeader is located?
body: <p>I am new to Prestashop and programming and I am trying to add some content to Prestashop 1.4.5.</p>
  
  <p>I made a new simple module that hooks to the hookHeader. I got it working and it shows Hello World in the top of the shop. But when i open the site and open the source code I see it is added before the the doctype:</p>
  
  <p>Hello World</p>
  
  <p></p>
  
  <p>My module php looks like this - I am not using a template:</p>
  
  <p>if ( !defined( '_CAN_LOAD_FILES_' ) )
      exit;</p>
  
  <p>class primanetskintop extends Module {</p>
  
  <pre><code>function __construct()
  {
      $this-&gt;name = "skintop";
      $this-&gt;tab = 'front_office_features';
      $this-&gt;version = '0.1.0';
      parent::__construct();
      $this-&gt;displayName = $this-&gt;l('Insert skin top');
      $this-&gt;description = $this-&gt;l('Skin - ikke slettes');
  }
  
  function install()
  {
     if (!parent::install() OR !$this-&gt;registerHook('header'))
              return false;
      return true;    
  }
  
  function uninstal()
  {
      if (!parent::uninstall())
          return false;
      return true;
  }
  
  public function hookHeader($params) 
  {
      echo "Hello World!";
  }
  </code></pre>
  
  <p>Why does the hello world not show where the hookHeader is located? What am i doing wrong?</p>
  
  <p>Thank you :D</p>