I would like to find a script that works sort of like the sample below

right now it works like this if input
PHP Code:
then add what text you like to the end of the url it will show that if you use the add image feature

I would like to have the same idea but work from a text a file so it can updated or changed without the need to edit a post only edit the text file and it will show the changes live in the post.

I am just having zero luck locating one.

found one I got a while back and its a tad better but doesn't work off a text file

Still searching for this elusive unicorn