I used a cart observed to block 1 single item in the cart and then display a notification to the user like a notification style "you coold select just one item" the problem that it's appears to me the error log magento first then when I return to the home page. I find my message displayed. I just want to display it in my page and not also in the error log page.



My Observer:

class Amir_Prince_Model_ObserverCountItemCart{
    public function limiter_panier(Varient_Event_Observer $observer) {

    $session = Mage::getSingleton('checkout/session');
    $quote = $session->getQuote();

    $message = 'You can select only one item.';
    // Mage::thrownewException($message); // the log error commented
    throw new Exception($message);// the frontend notification

  • what event are you using? – Marius Oct 27 '15 at 9:43
  • my event: catalog_product_type_prepare_full_options – Miroo Oct 27 '15 at 10:25
  • where is that event dispatched? I cannot find the Mage::dispatchEvent() call in the code. – Marius Oct 27 '15 at 12:06
  • what event you want to say, in the config.xml ? look I post you what I have done in my question on the top – Miroo Oct 27 '15 at 13:18
  • Not your code...I wanted to know the core file where this event is dispatched. To get and idea what happens before or after your observer is called. – Marius Oct 27 '15 at 13:29

Instead of throw new Exception($message); you can try this:

$request = Mage::app()->getRequest();
$refererUrl = $request->getServer('HTTP_REFERER');
if ($url = $request->getParam(Mage_Core_Controller_Varien_Action::PARAM_NAME_REFERER_URL)) {
    $refererUrl = $url;
if ($url = $request->getParam(Mage_Core_Controller_Varien_Action::PARAM_NAME_BASE64_URL)) {
    $refererUrl = Mage::helper('core')->urlDecode($url);
if ($url = $request->getParam(Mage_Core_Controller_Varien_Action::PARAM_NAME_URL_ENCODED)) {
    $refererUrl = Mage::helper('core')->urlDecode($url);
$refererUrl = Mage::helper('core')->escapeUrl($refererUrl);
if (!$this->_isUrlInternal($refererUrl)) {
    $refererUrl = Mage::app()->getStore()->getBaseUrl();

this will redirect to the previous page and you will see the notice above the page.

and add this method in your observer

protected function _isUrlInternal($url)
    if (strpos($url, 'http') !== false) {
         * Url must start from base secure or base unsecure url
        if ((strpos($url, Mage::app()->getStore()->getBaseUrl()) === 0)
            || (strpos($url, Mage::app()->getStore()->getBaseUrl(Mage_Core_Model_Store::URL_TYPE_LINK, true)) === 0)
        ) {
            return true;
    return false;
  • i tried it and look the result: (364 Fatal error) at this line : if (!$this->_isUrlInternal($refererUrl)) – Miroo Oct 27 '15 at 14:37
  • Sorry. I forgot a method. See my update. – Marius Oct 27 '15 at 14:42
  • should i put some url in the mathod in the commented part: /*Url must start from base secure or base unsecure url*/ this time i havn't an error against but a blank page. I wonder if it's my page that contains an error or in the observ. your code it refreshed me well result.phtml page but no content. I try to go from result.phtml to cart and returned backwards or just refresh the page, and it shows me although my content. ! – Miroo Oct 27 '15 at 15:20
  • I verified my page code, there's no mistake. can we do a redirect to cart which is the next page and display the message above, otherwise if it's not possible display it in the home page. – Miroo Oct 28 '15 at 15:30

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