I have a website that I just created a contact form for. However. it seems like a bot has hit the form, and continously fills out emails. I don't know php very well - and someone else did most of the work.
I don't want to put a captcha in, as it reduces the amount of people that will fill out the form. Instead, I'd like to make a "do or die" code that requires the user to fill out a phone number.
Here's the current code. What should I do to fix it?