How to send captcha to antigate using PHP?

Question

PHP

Friends, welcome again.
A little lost in space when solving the problem.
Situation:
In general, I am doing authorization on my site on other resources so that the user enters data, and the page of the personal account of another resource is parsed there.
Questions:
1) There is a site, for example, and it has a captcha that is generated on the server, that is, I just can’t download the curtain. The question is how to get it to send it to antigate. (An example of a captcha is here socpublic.com ) If I copy the src attribute and put it after the update, then it does not show the previous one (oddly enough).
2) I make a request to the site using cURL. And the question is this: To get the captcha itself - I make a request to the site. Let's say the captcha went to anti-gate, it was solved there and I'm ready for authorization, but after all, when I make the next request for authorization, will the captcha be different? Right.
I would appreciate it if you point me in the right direction. And then I don't know what to use. Can I somehow screenshot with js? Don't even know.

Answer 1

that is, I just can’t download the curtain

can. the browser is downloading.
you need to pass cookies, headers, and most likely be able to execute javascript.