How to fill out a form on a different URL?

Question

Yii

Hello. Actually the whole question is in the title.
More so:
There is a site on Yii (v.1). You need to check that the bot (the simplest one) will not register. We will add a captcha later, after this test.
Question: we need a similar “tester”, in the form of a ready-made class. Where to find?

Answer 1

can you just send the post itself using httpful or php curl?

Answer 2

need a similar tester

Not needed. This is a pointless test.
Without any test, it is already obvious that the bot will register.