W3C home > Mailing lists > Public > public-html@w3.org > July 2009

Re: PHP code only allowed in XHTML 5?

From: Leif Halvard Silli <lhs@malform.no>
Date: Wed, 22 Jul 2009 16:07:12 +0200
Message-ID: <4A671D10.4050001@malform.no>
To: Kornel <kornel@geekhood.net>
CC: Daniel Glazman <daniel.glazman@disruptive-innovations.com>, public-html@w3.org
Kornel On 09-07-22 15.02:

> On 22 Jul 2009, at 09:47, Daniel Glazman wrote:
>> Toby A Inkster wrote:
>>> <p class="<?php echo 'foo';?>">
>>> Invalid in both XHTML and HTML, but perfectly legal PHP. PHP's start 
>>> and end markers are not real XML processing instructions. They just 
>>> look a bit like them.
>> They are real processing instructions and the current PHP start marker
>> <?php was not the one early versions of PHP used. It was changed to
>> match SGML/XML PIs to allow editability in markup editors and wysiwyg
>> editors.
>> Breaking that compatibility is, IMHO, a serious error.
> They are not. They are just roughly similar and compatible only in most 
> basic cases.

No one is disputing that one may place things between "<?php" and 
"?>" that breaks the syntax expectations of a PI.


> Validation of PHP files cannot work reliably, it never did, and it would 
> be disservice to authors to pretend otherwise.

If the coding style is to produce valid PIs, then it is a 
disservice to prevent validation.

> If you want to ensure that code PHP generates is valid/well-formed, I 
> suggest using templating engine for PHP that doesn't break XML syntax, 
> for example PHPTAL or OPT 2.0.

The unparsed PHPTAL and OPT 2.0 syntax is not valid HTML 5.
leif halvard silli
Received on Wednesday, 22 July 2009 14:07:54 UTC

This archive was generated by hypermail 2.4.0 : Saturday, 9 October 2021 18:44:51 UTC