Question to build web app + layer on call

Hello, I’m wondering is that possible to write thru this framework an simple app with layer on phone call (receiving call or calling) to search for phone number in my web app via $_GET request and return some data to show in this window layer? I just want to show which # order number is according to this phone number, so maybe its possible to show simple data or even html/css box? I dont want separate app to manually find - just simple app to overlay phone call.

What u can recommend to do it as simple as possible? even newbie as me can do it? Any tips would be helpful

Thank you