Protein is produced in the Rough Endoplasmic Reticulum, then packed in a vesicle and sent to the Golgi apparatus to be exported outaround the cell.
the protein leaves the rough endoplasmic reticulum to the Golgi Apparatus where it modifies, sorts, and packages proteins and other materials from the endoplasmic
It's a few things more...
Let's just say PHP is a scripting language. It like a big you can configure to transmit information on or off a page.
Your form could be html or php.
The script that processes the info that the user types into the form would be php.
Your thank you page could be text, or html, or php.
You need to think about how you're planning to store your user info, IMHO.
Are you planning to keep the info in a flat file or a database?