title: How to add a view helper directory (zend framework)
body: <p>I begin with ZF (1.9.7), and I want to use View Helpers from a library shared between all my projects. But I can't find how to add it directory to the helpers path. My herpers works fines when I put them in application's helpers path.</p>
  
  <p>Here is the error, where I find the path to ZF helpers, and path to the applications ones.</p>
  
  <pre><code>object(ArrayObject)#71 (3) {
    ["exception"]=&gt;
    object(Zend_Loader_PluginLoader_Exception)#70 (6) {
      ["message:protected"]=&gt;
      string(151) "Plugin by name 'Voo' was not found in the registry; used paths:
  Zend_View_Helper_: Zend/View/Helper/;C:/ZendStd/www/applis/VOO4_PROJECTX/views\helpers/"
      ["string:private"]=&gt;
      string(0) ""
      ["code:protected"]=&gt;
      int(0)
      ["file:protected"]=&gt;
      string(89) "C:\Program Files\Zend\ZendServer\share\ZendFramework\library\Zend\Loader\PluginLoader.php"
      ["line:protected"]=&gt;
      int(401)
  </code></pre>
  
  <p>Best regards<br>
  Cédric</p>