Summary
In this tutorial, you started to create the heart of the workflow application: The user's ability to add files. You enabled users to log into the system and create a session that recognizes them and upload a file. You saved the file on the server, and you used first XML, then JSON to save information about it. Along the way, the following topics were covered:
- Creating a session
- Using an existing session
- Uploading a file
- Creating an XML file using DOM
- Loading XML data using DOM
- Manipulating XML data using DOM
- Creating JSON data
- Manipulating data using JSON
- Saving and loading text files
In Part 3, you'll complete the application.




