Converting an array to a collection in Magento

Question

I have an array object that is an output of a magento fetchall from DB and i want this to be converted to an object of a Collections class so that i can implement pagination

Answer 1

If you have an array of ids $product_ids, you can use:

$collection = Mage::getModel('catalog/product')->getCollection()
        ->addIdFilter($product_ids);