Determine Page Type in Magento

If we want to know page type ( whether it is a Category, Product, CMS, Cart page or Checkout Success page ) in Magento, the following code may come handy.

<?php

// GET current Category, Product
$category = Mage::registry('current_category');         
$product  = Mage::registry('current_product');

// WE May use the below also
//$product  = Mage::registry('product');

// GET ROUTE information
$route =  Mage::app()->getFrontController()
                     ->getRequest()->getRouteName();

// Return controller name
$controller = Mage::app()->getRequest()
                         ->getControllerName(); 

// Return action name
$action = Mage::app()->getRequest()->getActionName(); 


if($product != null) 
{
   // PRODUCT PAGE
   // WRITE code for PRODUCT PAGE
   
}
else if($category != null) 
{
   // CATEGORY PAGE
   // WRITE code for CATEGORY PAGE
}
else 
{  
   // CMS PAges
   $identifier = Mage::getSingleton('cms/page')->getIdentifier();
   
   // CART PAGE and ORDER SUCCESS Page
   if($route == 'checkout')
   {
      // Success Page
      if($action == 'success')
      {
// GET ORDER TOTAL
$orderId = Mage::getSingleton('checkout/session')
                    ->getLastRealOrderId();
        $order = Mage::getSingleton('sales/order')
                    ->loadByIncrementId($orderId);
        $orderTotal = $order->getGrandTotal(); 
      }
      else 
      // CART PAge
      {

// GET Cart Total
$quote = Mage::getModel('checkout/session')
                               ->getQuote();
$quoteData= $quote->getData();
$cartTotal = $quoteData['grand_total'];
      }
   
   }
   
   // FIRECHECKOUT PAGE
   if($route == 'firecheckout')
   {
                // IF IT is FIRECHECKOUT Page
   }
   
   // Search Result PAGE
   if($route == 'catalogsearch')
   {
       // IF IT is SEARCH RESULT Page
   }
   
   // Website HOME page
   if($identifier == "home")
   {
      // IF it is HOME PAGE  
   }
}
?>


So, In the first section of the program, we are trying to get if it is a CATEGORY or PRODUCT page by calling 

$category = Mage::registry('current_category');         
$product  = Mage::registry('current_product');

We may use  $product = Mage::registry('product'); instead of $product = Mage::registry('current_product'); 

IF it is a Category page, $category would have a non-null value. Similarly, when it is a product page, $product variable would have a non-null value. 

To determine CMS and other pages like Cart, Checkout etc, we need to catch the route, controller name and action name. So we use the following ::

$route =  Mage::app()->getFrontController()
                     ->getRequest()->getRouteName();
$controller = Mage::app()->getRequest()->getControllerName(); 
$action = Mage::app()->getRequest()->getActionName(); 

For CMS pages, we get page ID/Identifier by calling this :: 
$identifier = Mage::getSingleton('cms/page')->getIdentifier();

There is another Magento fundtion called getFullActionName() which returns full action name which comprises of route name, controller name and action name. 

$fullActionName = Mage::app()->getFrontController()
                             ->getAction()
                             ->getFullActionName();

So, on "Contacts" page, full action name is 'contacts_index_index' where 'contacts' is the front name, first 'index' means 'indexController' controller and second 'index' refers to 'indexAction' function/method defined within that controller PHP file.

Some full action name examples given below. From there, we can easily identify the Front/Route name, Controller Name and Action Name.

checkout_cart_index                => Cart Page
checkout_onepage_index         => Checkout Page
checkout_onepage_success    => Checkout Success Page
customer_account_login         => Customer Login
customer_account_logoutSuccess => Customer Logout 
customer_account_create      => Registration Page
customer_account_index        => Customer Dashboard
wishlist_index_index           => My Wishlist
cms_page_view                              => any CMS page
contacts_index_index             => Contacts page 
catalog_seo_sitemap_category  => SiteMap Catalog
catalogsearch_term_popular        => Search Term Page
catalogsearch_advanced_index => Advanced Search

Hope this helps.