How to make query string in magento

How to make query string in magento

Here i will show you how to build query string in magento. Just see below exmaple.

http://chandreshrana.com/banner/save/index?pid=259

Above url convert in magento query string style

http://chandreshrana.com/banner/save/index/pid/259/

Now how to get pid value.. just write below statement..

echo Mage::app()->getRequest()->getParam('pid');