magento get store configuration
How to get Magento system configuration value?
It's easy:
Mage::getStoreConfig($path, $storeCode) // $storeCode is not required
for example you need to get value set for store phone number from system config:
Magento get base directory
You can get different directory paths in magento with one line code.
Mage::getBaseDir('directory_type');
where directory_type can be:
Set application root absolute path in magento
If you want to change the path of magento core application folder, then you can set it as:
Mage::setRoot('/path/to/your/app');
If you look into app/Mage.php you will find that function.