在PHP中使用表单的好习惯是什么?你能在表单中使用OOP PHP吗?

Right now i been creating a form for a comment section, a Login section, and sending email for a site i'm doing. The code I using was from a tutorial I learned and has too much HTML in it. It was the only way I knew how to create a form and valid the data. I wanted to ask if there was a better way to create forms and if there was a way to create a form in OOP PHP? I want learn to go beyond basic stuff to OOP.Right now i been creating a form for a comment