How to find the position of the cropped image on the original?

Question

PHP

I receive from social networks, the original user avatar and a small cropped version. Profile editing has its own crop functionality, I would like to initialize it on the first run based on the available pictures. What are the possibilities for this?
I can’t formulate a query to a search engine - as soon as they see the word “crop”, they immediately helpfully begin to tell how to crop images ...

Answer 1

https://www.google.com/search?q=sub+image+search+a...
что конкретно из всего того работает придется искать тебе