@cristimocean and as you are subscribed user here on Laracasts, if you click on the Search on top, it will show you a page with filters, and there is a difficulty level selection with which you can filter the results.
I will recommend this series:
https://laracasts.com/series/build-a-laravel-app-with-tdd
So it is not with Plain PHP, but through Laravel and digging yourself in the core of the framework you will learn a lot anyway. There is a new series that gets updated weekly and it shows you Laravel from scratch through which you can learn a lot also.
The community is very big, and there are active resources being delivered every single day, so just follow the forum here, get involved also it will help you a lot. The book as you said Novice to Ninja, you stopped at the beginning so you will not know if it gets you to Ninja :D Just kidding, but I read books as well, as I can find always something useful, but I don't stop even if I find it boring :)