How do I break a CAPTCHA


looking for a secure PHP form mailer for a contact form.

I know the internet is teeming with posts about it.
Since I have no idea about PHP, my problem is that I cannot assess the quality of the contributions and solutions.

Therefore please no general references to Google.
The question is aimed at practitioners who can give me a recommendation or even have code that is safe.

It would be important to me:
1. No solution that runs on a third-party server
2. Code that does not require any additional tools such as YDFramework.

1 question:
Do you have a recommendation or code for a secure contact form without a catcha.

2nd question:
I found the following code fragment on the Internet. How do you rate that?

I found it good with my limited knowledge. I think it's good that I get feedback from it.
I found the article at

Here is the code:

I would be grateful for answers to the questions.

(As I said, I do not know my way around PHP. I can only make small integrations in the try and error procedure through knowledge of other languages.)

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