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copied!<p>Making the code work the right way is much more easier in Magento than trying to work with ugly legacy code. I would gladly help you make the code the proper way when you have specific questions. Also, in the longterm, technical debt is gonna cost alot more.</p> <p>Anyway, back to your issue.</p> <p>In Magento block are not instantiated like in any app <code>$myvar = new className</code> ... almost never. <a href="http://www.magentocommerce.com/knowledge-base/entry/magento-for-dev-part-4-magento-layouts-blocks-and-templates" rel="nofollow">This tutorial</a> can help you understand better Magento's layout and blocks.</p> <p>But if you want to create a block a way to do it is: </p> <pre><code>$block = Mage::getSingleton('core/layout')->createBlock('catalog/product_list') </code></pre> <p>Now related to your product collection you should check how <code>Mage_Catalog_Block_Product_List::_getProductCollection</code> actually works, because it uses the layered navigation, not a simple product collection.</p> <p>Further, assuming that at least you are using a Magento controller and you are within a function, the following code will display the first page of products for a specified category:</p> <pre><code>//$category_id needs to be set $layout = Mage::getSingleton('core/layout'); $toolbar = $layout->createBlock('catalog/product_list_toolbar'); $block = $layout->createBlock('catalog/product_list'); $block->setChild('toolbar', $toolbar); $block->setCategoryId($category_id); $block->setTemplate('catalog/product/list.phtml'); $collection = $block->getLoadedProductCollection(); $toolbar->setCollection($collection); //render block object echo $block->renderView(); </code></pre> <p>Displaying specific ids:</p> <ul> <li>you use root category id for $category_id variable (also make sure that display root category is set (or another category id that contains your product ids)</li> <li>you can hook into <code>catalog_block_product_list_collection</code> event to add your ID Filter to the collection (this is called in <code>_beforeToHtml</code> function)</li> </ul> <p>But, all this construction is not solid and there are still some points that require attention (other child blocks, filters and so on)</p>

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