Have you looked at this one? https://www.codecademy.com/learn/learn-php If you google you should find some options. There are good javascript tools too - because you can't just learn php
Instead of doing all these exercises, try and code up a website in PHP, like a flat file blog system. That will give you enough exercise.
You won't learn anything of any use there, I don't do much coding these days so I'm not sure but this site may be useful: https://www.tutorialrepublic.com/