PHP and XSLT: extending the processor

Question

I need to extend XSLT processor in PHP with my own tags and functions. I found some APIs, but these APIs is still not what I need.

1) http://php.net/manual/ru/book.xsl.php - quite simple API, but I can extend functions only (registerPHPFunctions), not tags.

2) http://www.php.net/manual/en/ref.xslt.php - nice and simple, I can extend whatever I need (xslt_set_sax_handlers), but, here we go - another problem. Introduction (http://www.php.net/manual/en/intro.xslt.php) says: "This extension has been moved to the » PECL repository and is no longer bundled with PHP as of PHP 5.0.0.". Okay, I'm navigating to pecl.php.net -> Search Packages -> XSLT -> No results found -> o_O

So, looks like the good API was deprecated, and the bad API doesn't satisfy my needs. What can you recomend guys? I need a PHP XSLT processor where I can extend or override everything that can be extended or overridden like the "2)" above does. Thanks!

It would be better if you said what you are trying to achieve. You want to add extension elements to XSLT, I take it, but why exactly? — barefootliam, Sep 13 '12 at 01:39
Yeah, I'm interested in hearing your functional requirements also. PHP has quite a lot of nice XML parsing functionality to complement the usual SAX/DOM/XSL features. You may find that what you need is already there unless your solution absolutely must be XSL. — Mike Girard, Sep 13 '12 at 09:20
Hey guys. I'm writing new version of my website engine. The essense of the engine - is XSLT processor + tag/function extensions + transparent data binding (like MySQL). So, I need a way to write custom PHP handlers for several XML tags. Currently I use regexp replace to achive custom XML tags behavior, but it has a set of problems. For example - nested structures handling. — nyan-cat, Sep 13 '12 at 10:02
possible duplicate of [Upgrade PHP XSLT processor to XSLT 2.0](http://stackoverflow.com/questions/3873996/upgrade-php-xslt-processor-to-xslt-2-0) — Paul Sweatte, Apr 08 '14 at 02:10

score 0 · Answer 1 · edited May 23 '17 at 12:13

PHP uses libxslt as its default processor, and libexslt as its extension processor. Here is the API documentation:

In addition, libxsltalready supports an eval extension, which may serve your purposes.

There's also built-in macros available via xsl:processing-instruction which match the shorthand delimiters of PHP:

And the registerPHPFunctions method.

A transformation can pass a XPath expression as an argument to a function in a custom namespace:

<xsl:stylesheet version="1.0"
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  xmlns:js="urn:livescript"
  extension-element-prefixes="js"
>

  <xsl:variable name="source" select="//"/>

  <xsl:template match="json">
    <xsl:value-of select="livescript:JSON($source)"/>
  </xsl:template>
</xsl:stylesheet>

The function links to an external transformation which computes the XPath result and returns the result by using a callback.

References

PHP and XSLT: extending the processor

1 Answers1