Huh, this is a long title. To bad I could not fit extra more into it :). Extending admin interface in Magento can be a tedious task. Unlike WordPress where you have a thing or two to setup then the rest of it comes to good old HTML forms and stuff, Magento requires completely different approach. Magento uses xml configuration files to build parts of admin interface needed for your custom module.
In this article I will show you how to “understand and read” existing config.xml files in order to build interface and at the end, how to read the values stored in admin backend. After all, that’s the point of admin interface, you setup some stuff, write some values, then you use those values across your site where certain functionality is needed.Read more