A possibly "silly" question.
Would I possibly run into any problems (incompatibilities) deploying eg.: on Centos/Apache (php5/MySQL5) a project developed on Win desktop (WAMP/XAMPP - php5/MySQL5).
I found some answer: here on Stack.
But it does not address all my concerns.
If I missed any thread - I appreciate a link.
For a simple PHP application, you shouldn't have any problems. I have done this many times.
There are a few things to keep in mind when developing though, the three biggest I have run into being:
-Make sure your PHP extensions are the same on both machines. You can see this in phpinfo()
-Avoid hard coded file paths. If you have any, you will need to check for both a Windows and a Linux location
-Keep file case consistent, Linux is case sensitive while Windows is not, so a file that is found in Windows will not be in Linux if the case is not consistent