Thank you, kglad.
Yes, it should have been more specific. The canvas page contains tons of graphics created with Animate cc and is to be seen online and by different users. The idea is to save the name that a user writes in the "dynamic text field" until another user decides to rewrite it with their name.
If you want, I'll write your answer as correct and write a new query.
Regards
nothing above is correct with your latest request. you're going to have a lot to learn to do what you described.
first, you'll need to use ajax in animate to communicate with your server-side code (eg, php) and you'll need server-side code to communicate with your database.
you'll need to learn some javascript so you can understand ajax and you'll need to understand some php so you can login and query your database and return data to your ajax function to be used in animate. (and you'll need to create your database if that's not already done.)