how to get magento path url and get directory in magento

Get URL paths of your magento folder structure – Absolute URL Path
Mage::getBaseUrl() => Gets base url path e.g. http://my.website.com/
Mage::getBaseUrl(‘media’) => Gets MEDIA folder path e.g. http://my.website.com/media/
Mage::getBaseUrl(‘js’) => Gets JS folder path e.g. http://my.website.com/js/
Mage::getBaseUrl(‘skin’) => Gets SKIN folder path e.g. http://my.website.com/skin/
Get DIRECTORY paths (physical location of your folders on the server) – Relative URL Path
Mage::getBaseDir() => Gives you your Magento installation folder / root folder e.g. /home/kalpesh/workspace/magento
Mage::getBaseDir(‘app’) => Gives you your Magento’s APP directory file location e.g. /home/kalpesh/workspace/magento/app
Mage::getBaseDir(‘design’) => Gives you your Magento’s DESIGN directory file location e.g. /home/kalpesh/workspace/magento/design
Mage::getBaseDir(‘media’) => Gives MEDIA directory file path
Mage::getBaseDir(‘code’) => Gives CODE directory file path
Mage::getBaseDir(‘lib’) => Gives LIB directory file path
Get Current URL – whole URL path
Mage::helper(‘core/url’)->getCurrentUrl()

........................................................................................................

it will also help you
...............
base Mage::getBaseDir()
Mage::getBaseDir(‘base’) /var/www/magento/
app Mage::getBaseDir(‘app’) /var/www/magento/app/
code Mage::getBaseDir(‘code’) /var/www/magento/app/code
design Mage::getBaseDir(‘design’) /var/www/magento/app/design/
etc Mage::getBaseDir(‘etc’) /var/www/magento/app/etc
lib Mage::getBaseDir(‘lib’) /var/www/magento/lib
locale Mage::getBaseDir(‘locale’) /var/www/magento/app/locale
media Mage::getBaseDir(‘media’) /var/www/magento/media/
skin Mage::getBaseDir(‘skin’) /var/www/magento/skin/
var Mage::getBaseDir(‘var’) /var/www/magento/var/
tmp Mage::getBaseDir(‘tmp’) /var/www/magento/var/tmp
cache Mage::getBaseDir(‘cache’) /var/www/magento/var/cache
log Mage::getBaseDir(‘log’) /var/www/magento/var/log
session Mage::getBaseDir(‘session’) /var/www/magento/var/session
upload Mage::getBaseDir(‘upload’) /var/www/magento/media/upload
export Mage::getBaseDir(‘export’) /var/www/magento/var/export