Magento – Get all Categories of Products in Category – PHP

categorycategory-productsmagento-1PHP

What I am trying to do is to get all of the categories that belong to products in a given category. Given the brand category Nike, I want to display the categories that products in Nike also belong too. For instance, in the category Nike there are products that also belong to the categories: Shoes, Shirts, Shocks etc. I want to display a list of these categories.

I have seen many many ways to display the subcategories and subcategories of a parent category. But I am unsure of how to get the categories that each product belongs to for a given category.

Any help or guidance is appreciated.

Best Answer

If you have a ready collection of products, then you can get all the categories that include current products without any binding to the product ID:

 <?php
$cats = [];
/** @var Mage_Catalog_Model_Product $_product */
foreach ($_productCollection as $_product) {
    $curProductCats = $_product->getCategoryIds();
    if (empty($curProductCats) || !is_array($curProductCats)) {
        continue;
    }
    $cats += array_flip($curProductCats); // Use the category id as key & merge prev. result with current
}
var_dump($cats);
?>

This code will return you the array, where categories ID will be the keys. This is the easiest way. In addition, you can modify the code according to your requirements.

Note, that such a cycles can slow down page loading speed when you have a large database.

Related Solutions

How to Get Top Parent Category from Current Category Object in Magento 1

$category->getPath() will return the ids of all categories from the tree root to the current one separated by slash (/). Here is an example: 1/2/56/124/543. The first one is the 'root of roots'. The second one is the catalog root (default category). The rest of them are simple categories. So you can do something like this.

$path = $category->getPath();
$ids = explode('/', $path);
if (isset($ids[2])){
    $topParent = Mage::getModel('catalog/category')->setStoreId(Mage::app()->getStore()->getId())->load($ids[2]);
}
else{
    $topParent = null;//it means you are in one catalog root.
}

Now you can get the name and url like this:

if ($topParent){
    $name = $topParent->getName();
    $url = $topParent->getUrl();
}

Magento – How to get all active categories and subcategories in product listing page

this will show like breadcrum.

I know this is quite old, but I'd like to share my solution anyway as it doesn't override/clone any core files.

In your custom module add the following to your config.xml:

<config>
    ...
    <frontend>
        <events>
            <catalog_controller_product_init>
                <observers>
                    <breadcrumb_categorypath_product_init>
                        <type>singleton</type>
                        <class><Your Namespace>_<Your Module>_Model_Observer</class>
                        <method>fullBreadcrumbCategoryPath</method>
                    </breadcrumb_categorypath_product_init>
                </observers>
            </catalog_controller_product_init>
        </events>
    </frontend>
</config>

Create an Observer.php in /app/code/local///Model/

Add the following to your Observer.php:

class <Your Namespace>_<Your Module>_Model_Observer {
    public function fullBreadcrumbCategoryPath(Varien_Event_Observer $observer) {
        $current_product = Mage::registry('current_product');

        if( $current_product ) {
            $categories = $current_product->getCategoryCollection()->addAttributeToSelect('name')->setPageSize(1);
            foreach( $categories as $category ) {
                Mage::unregister('current_category');
                Mage::register('current_category', $category);
            }
        }
    }

I hope this will help you.

Best Answer

Related Solutions

How to Get Top Parent Category from Current Category Object in Magento 1

Magento – How to get all active categories and subcategories in product listing page

Related Topic