Use OPENAI API extract data from PDF invoice from a PHP script

Hello,

we used ChatGPW web access to feed PDF invoice and get back a json with description of content, expecially:
- Information about invoice emitter company
- Date and number of the invoice
- Detail for the invoce rows

We want now to user OPENAI API to do the same job from a CRM via API, but we cannot just feed the PDF via API and ask for elaboration.

We look for an expert in this field that ALREADY DID a similar job, to creare a PHP scritp that can complete this task.

Input:
We provide a PDF of an invoce and a description of what result we want
Outpot:
A json wih data from the pdf invoice.