How can I make a Flux Integration?

[eKoh]

Hello guys, I want to learn on how to make a flux integration. I've read that I have to know HTML, CSS and some PHP.

I have made some websites using html and css, and currently I am learning PHP to make these flux integration, but now I am a bit clueless, since there are so many files and I am not really sure on what file should I start.

I really need some help, at least for the first steps, then I'll find the way to finish all the whole coding.

Thank you a lot for any response =)

 

[eKoh]

by reading/changing this and that, I think that I found the way to make the "flux integration" and is by editing the
 
header.php
footer.php
 
and from main(folder) also these
 
sidebar.php
submenu.php
 
But I wonder what sentences or instructions I must keep to leave the page working.
 
I see that the code has somethings like these:
 

<?php include 'main/sidebar.php' ?>
 
Should I keep instructions like that to leave it working?

 

[mybitch]

Don't forget the css