There are a few issues with the other solutions I originally used that I found from other wikis. I address the issues I had in this much simpler and shorter way. I am also going to explain what is going into way more detail than others to help people understand what's going on.
Trying to learn and help some other programmers to find their solutions on the Yii Forum (I think is a superb way to learn the framework), I was facing one challenge with an external library that a fellow programmer wanted to use -quite good indeed: PHPExcel. And what is PHPExcel?
Please, note. This article is entirely based on a work done by me colleague developer, who hasn't got account on this webpage and also hasn't got time for writing this article. I'm writing it for him. I will try to forward him any comments that may appear, but can't assure if/when he'll be able to answer. I'm far, far less experienced in Oracle therefore I won't probably be able to help myself.
There is an issue on Yii2 to redirecting / urls to /frontend/web.
In other words we need a way to hidden /frontend/web from addresses.
We will do this without changing Apache configuration and creating virtual host or setting document root (It's good for share hostings that we have not access to apache.conf)
We all know how good 'gii' automates the code for us and we normally tend to be happy with what that tool offers at the beginning of our Yii learning curve. But as soon as you start working in larger and larger projects, you realize that its code is too repetitive to maintain and having a small pitfall in general actions means to go over and over through them to fix the issues.