Hjdcti

I have get the current product category id on product details page. I have used some method like :

$_product = Mage::getModel('catalog/product')->load(prodId);
$ids = $_product->getCategoryId();
$cat = Mage::getModel('catalog/product')->setId($ids);

but its not work as i want.

$products = Mage::getResourceModel('reports/product_collection')
 ->addAttributeToSelect('*') 
 ->setStoreId($storeId)
 ->addStoreFilter($storeId)
 ->addViewsCount()
 ->addCategoryFilter($cat)
 ->setPageSize($productCount); 

but its return some times this error

 Fatal error: Call to a member function getId() on a non-object in /var/www/html/app/code/core/Mage/Catalog/Model/Resource/Product/Collection.php on line 719 

Because 1 product can stored in multi categories, so
when call

$categoryIds = $_product->getCategoryIds();

it will a array.

foreach($categoryIds as $id) 
 $cat = Mage::getModel('catalog/category')->load($id);

If you just need to obtain the current category on a product page, the easiest way to do that is to get it from the Registry:

echo Mage::registry('current_category') ? Mage::registry('current_category')->getName() : 'No category';

To get an ID, use:

$catid = Mage::registry('current_category') ? Mage::registry('current_category')->getId() : null;

You can use below code:

$categoryIds = $_product->getCategoryIds(); 
if(count($categoryIds) )
 $firstCategoryId = $categoryIds[0];
 $_category = Mage::getModel('catalog/category')->load($firstCategoryId);

 echo $_category->getName();
 echo $_category->getId();

Try this:

//This will get the info of current product.

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

$prodID = $product->getId();

$_product = Mage::getModel('catalog/product')->load($prodID);

$categoryIds = $_product->getCategoryIds();

foreach($categoryIds as $categoryIds1) 

$_category = Mage::getModel('catalog/category')->load($categoryIds1);

//get all category ID in the current product.

echo $category_id = $_category->getId();

//get all the Category Name of the Current Product.

echo $category_name = $_category->getName();

$_product = Mage::getModel('catalog/product')->load(prodId);
$ids = $_product->getCategoryId();
var_dump($ids); //this is category id

Below code is wrong:

$cat = Mage::getModel('catalog/product')->setId($ids);