Run App/Script From Within WordPress & Automate Post Creation

I’m using the Inline PHP plugin to write PHP code directly into my posts. The reason I’m doing this is because every post is essentially the same, but with different variables and images. This way, my posts can be dynamic and simply query my databases for the data they need.

Because all of my PHP scripts are going to be the same and just use different variables, I’ve decided to write an app/script that uses a GUI and allows me to enter the new variables. My original plan was to do this externally with Java (because I know the language quite well and am good with the GUI). The Java app would take my input and develop a PHP script, which I would then manually copy and paste into a new post. However, now I would like to know two things:

1. Can I write an application that I can run from within WordPress to create the script that will eventually make its way into a post?
– If so, which language should I write it in?

2. Is there a way for me to have an application automatically copy and paste that script it created into the post editor and create the post?

Any help is much appreciated!