Scripting and XML

Rasmus Lerdorf rasmus at
Sun Oct 19 06:27:46 BST 1997

> At 11:50 PM 18/10/97 -0400, Rasmus Lerdorf wrote:
> >My solution, naiive as it might be, is to make hide my language inside a
> >PI tag. The XML syntax definition for this tag is:
> ...
> >So, a typical bit of code would look like:
> >  <?php
> >    $result=mysql("db","select passwd from users where id='$cookie'");
> ...
> >  ?>
> The question is, do you regard your script as part of the document
> or not?  If so, you should use <![CDATA[.  If not, the PI is perfectly
> appropriate and being used exactly as designed. -Tim

I suppose that depends on what you mean by, "being part of the document".
I do not regard the script as being part of the information the document
is trying to convey.  The script can however generate output that will be
part of the final document.  But, an XML parser that understood PHP
processing instructions would be needed to grok that.  

My only real goal is to make sure that an XML parser will not spew
thousands at syntax errors at me when I run an XML file full of PHP script
tags through it.  And, if it can be parsed without errors, then I expect
that an XML authoring system would happily let people add these tags in
some sort of escaped or raw, insert your own tag, sort of mode.


xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev at
Archived as:
To (un)subscribe, mailto:majordomo at the following message;
(un)subscribe xml-dev
To subscribe to the digests, mailto:majordomo at the following message;
subscribe xml-dev-digest
List coordinator, Henry Rzepa (mailto:rzepa at

More information about the Xml-dev mailing list