Composer is a dependency package manager in PHP. With Composer you can solve the problem where your project depends on a number of PHP based libraries and some of those libraries depend on other libraries. With composer you can declare the things your project depends on and composer finds out which versions of which packages need to be installed, and installs them (meaning it downloads them into your project).
KUDU is a developer’s paradise for Azure websites where there are ample tools from troubleshooting, analysis and diagnostics. Check out the kudu project on GitHub. To access your KUDU site, navigate to https://*****.scm.azurewebsites.net where ***** is the name of your website NAME running on Azure Websites.
KUDU supports single sign on , so enter your Azure account email credentials and once authenticated you should see a page similar to the one illustrated below