Php structured together continuous integration? [closed]

I am using PHP structured along with html and css for a page and they asked me to add continuous integration; I tried using travis reading the git documentation but I don't realize what it takes to make it work properly.

What I would need to try would be to send emails, register and modify a db (images and text) and a login, the html and css part I don't know if it can be automated.

Could you give me some advice / help where the problem is?

Thank you