what is a free option to host a website with html and php

I was originally using netlify to host my website, but i just added a contact form that uses php to process the information, and now when I host the website it says page not found, and I am pretty sure it is because netlify does not support php

Ive also looked at github but im pretty sure they dont support php, so I was just wondering if there are any GOOD options out there that are also free. Thank you!

Also, this is a side question, but is it better practice to have my contact.html form and connect the process.php form to it to handle the processing of the information or to change my contact.html to a contact.php and include all of the processing in that file. Thank you!