Field with xml data on edit post
I have an xml file, where I have already process the data and I have let’s say an array with the values that I am going to need.
What I want is somehow to create a button (or a field) on the edit post page, where will be displayed the values of my array. When the user selects a value, it should automatically populate some fields on the post page (or when the user saves the post).
Any ides how can I achieve this?