PHP header location-redirect doesn't work - why? [duplicate]
From PHP documentation :
header() must be called before any actual output is sent, either by normal HTML tags, blank lines in a file, or from PHP.
And in your case, you are using echo before header()
I reminded myself that I had xDebug installed on the actual test environment and after googling it, I found this site: http://bugs.xdebug.org/view.php?id=532
So I'll downloaded the last version of xDebug and changed the php.ini accordingly for the new file and everything works out like a charm. Headers are being sent - the redirecetion is done and errors are displayed.
Thanks everybody for your help!