Simple problem-while creating xml using php

Hi,
i am trying to [COLOR=#003366]Output mySQL data as XML with PHP[/COLOR][COLOR=black] , as you can see in the tutorial there is a line, where it begins to write xml. My problem is here. [/COLOR]

[COLOR=black]Whenever i try to write this line [/COLOR]
[COLOR=black][FONT=Courier New][COLOR=#0000bb]$xml_output [/COLOR][COLOR=#007700]= [/COLOR][COLOR=#dd0000]"<?xml version=“1.0”?>
"[/COLOR][COLOR=#007700]; [/COLOR][/FONT][/COLOR]
it gives error becouse of the ?> i try to use \ to be able to write but i couldnt solve the problem.

I do not know too much about php, so any help will be great. :egg:

by the way i make some search but couldnt find the solution for this, if there is an answer for this already, sorry for asking again :wink: