# XML guestbook with PHP - A small problem

**URL:** <https://forum.kirupa.com/t/xml-guestbook-with-php-a-small-problem/201372>\
**Category:** flash\
**Created:** [September 20, 2006, 7:12pm UTC](https://forum.kirupa.com/t/xml-guestbook-with-php-a-small-problem/201372 "2006-09-20T19:12:51Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Armored](https://avatars.discourse-cdn.com/v4/letter/a/5f9b8f/32.png) [@Armored](https://forum.kirupa.com/u/Armored)\
**Post date:** [September 20, 2006, 7:12pm UTC](https://forum.kirupa.com/t/xml-guestbook-with-php-a-small-problem/201372/1 "2006-09-20T19:12:51Z")

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Hi,

I was trying to build up a guestbook using the “XML guestbook with PHP” tutorial on this site. Everything goes OK except that when I press the “Send” button and the php script runs I always get the following error message:

Undefined variable: HTTP\_RAW\_POST\_DATA in \<b\>/www/usersites/s-x/sometexthere/processXML.php

Any ideas? Many thanks in advance!  
Cristian