Could somebody answer me of this questions please?
in every file, Magento said:
“Do not edit or add to this file if you wish to upgrade Magento to newer versions in the future. If you wish to customize Magento for your
needs please refer to http://www.magentocommerce.com for more information.`’
My question is, how can customize Magento for specific website without edit or add codes in these files.
Have I doing other new files related with the Core files of Magento?
Is this operation means Extentions?
Can somebody explain to me please?