Randomize Collection In magento

Randomize Collection In magento

 <?php

  $_model = Mage::getModel('catalog/category');

    // Using the "catalog/navigation" Block Classes, we can invoke the getStoreCategories() method to get all Store Cats.

  $storeId = Mage::app()->getStore()->getId();

 

   $_categories = Mage::getModel('catalog/category')

                    ->getCollection()

                    ->addAttributeToSelect('*')

->addIsActiveFilter()

->addLevelFilter(2)

->setStoreId($storeId);

$_categories->getSelect()->order(new Zend_Db_Expr('RAND()'));

$new="";$new2="";

    // We'll loop through the returned Category Object

    foreach( $_categories as $_category )

{

//this gives random order of products
}