Magento display multiple breadcrumbs in product view page

Question

In my site I need to show all (Display Full Breadcrumb Path) category and sub category in breadcrumbs.

My product in many category like this :

Shirts >> full sleeves >> product A
T-Shirts >> Polo >> product A
Sweaters >> Woolen >> product A
Men >> Dresses >> product A

Like above I want to display all in breadcrumb [all categories which the product belongs to] in next next lines.

How to achieve this ?

Answer 1

I did the extension in below GitHub Url with below feature :

https://github.com/vijays91/Magento-Advanced-Breadcrumbs

• Display the full path in product breadcrumbs (show all category paths).
• To display the single and multiple category breadcrumbs in product view page.
• Helps this module, search engines to parse your breadcrumbs (Home / Search result for: 'XXX' / XXX).
• Breadcrumbs are added to customer account pages.
• Added breadcrumbs to contact us page.

Answer 2

First of all you have to modify page/html/breadcrumb.phtml checking if you are in a product's page and then change your breadcrumb behaviour.

Something like this:

<?php if ($_product = Mage::registry('current_product')): ?>
    <?php
    $cats = $_product->getCategoryIds();
    ?>
    <?php foreach ($cats as $catId): ?>
        <div class="breadcrumbs">
            <ul>

                <?php $_cat = Mage::getModel('catalog/category')->load($catId); ?>
                <?php
                $parentPath = explode('/', $_cat->getPath());
                $parentPath = array_splice($parentPath, 2);
                ?>
                <?php foreach ($parentPath as $parentId): ?>
                    <?php $_prentCat = Mage::getModel('catalog/category')->load($parentId); ?>
                    <li><?php echo $_prentCat->getName() ?></li>
                <?php endforeach ?>
                <li><?php echo $_product->getName() ?></li>

            </ul>
        </div>
    <?php endforeach; ?>

<?php else: ?>
    ... // Standard breadcrumb code
<?php endif; ?>

For best performance use this:

<?php if ($_product = Mage::registry('current_product')): ?>
    <?php $cats = $_product->getCategoryIds(); ?>
    <?php foreach ($cats as $catId): ?>
            <div class="breadcrumbs">
                <ul>

                    <?php $parentPath = Mage::getResourceModel('catalog/category')->getAttributeRawValue($catId, 'path'); ?>
                    <?php
                    $parentPath = explode('/', $parentPath);
                    $parentPath = array_splice($parentPath, 2);
                    ?>
                    <?php foreach ($parentPath as $parentId): ?>
                        <li><?php echo $this->escapeHtml(Mage::getResourceModel('catalog/category')->getAttributeRawValue($parentId, 'name')) ?></li>
                    <?php endforeach ?>
                    <li><?php echo $_product->getName() ?></li>

                </ul>
            </div>
        <?php endforeach; ?>
<?php else: ?>
... // Standard breadcrumb code
<?php endif; ?>