Thanks! I could now solve the problem by configuring PHP to send a
HTTP_USER_AGENT header. It's probably good practice to that always.

/Pelle


On Thu, Sep 09, 2004 at 01:18:13PM +0100, Richard Tobin wrote:
> I replied to this on xml-dev yesterday but my message doesn't seem to
> have got through.  Here it is:
> 
> In article <20040908223551.GD800@gandalf>,
> Pelle Nilsson <pellenilsson@f...> wrote:
> 
> >I am trying to validate a RSS 0.9 document (not created by myself)
> >with PHP's DOM parser. The parser can't parse the file,
> >because it mistakes the doctype-tag for the root tag.
> 
> No, that's not the problem.
> 
> The problem is that the HTTP server is sending this back before the
> document:
> 
>  <br />
>  <b>Warning</b>:  get_browser(): HTTP_USER_AGENT variable is not set,
>  cannot determine user agent name in <b>/usr/rss/php/config.inc</b> on
>  line <b>38</b><br />
>  <br />
>  <b>Warning</b>:  Cannot modify header information - headers already sent
>  by (output started at /usr/rss/php/config.inc:38) in
>  <b>/usr/rss/php/backend.php</b> on line <b>3</b><br />
> 
> Presumably you aren't seeing this when you look at it in a browser
> because in that case the HTTP request contains a user-agent header.
> 
> If you fetch the document with wget and validate it, it's fine.
> 
> -- Richard