Home/ Manual/ xsl / xsltprocessor/ XSLTProcessor::registerPHPFunctions

XSLTProcessor::registerPHPFunctions

PHP function Edit on GitHub ✎

(PHP 5 >= 5.0.4, PHP 7, PHP 8)

Enables the ability to use PHP functions as XSLT functions

Description

XSLTProcessor::registerPHPFunctions(array|string|null $functions = null): void

This method enables the ability to use PHP functions as XSLT functions within XSL stylesheets.

Parameters

functions

Use this parameter to only allow certain functions to be called from XSLT.

This parameter can be one of the following: a string (a function name), an indexed array of function names, or an associative array with keys being the function name and the associated value being the callable.

Return Values

Void

Changelog

Version	Description
8.4.0	It is now possible to use `callable`s for callbacks when using `functions` with `array` entries.

Examples

Simple PHP Function call from a stylesheet

php

<?php
$xml = <<<EOB
<allusers>
 <user>
  <uid>bob</uid>
 </user>
 <user>
  <uid>joe</uid>
 </user>
</allusers>
EOB;
$xsl = <<<EOB
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" 
     xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
     xmlns:php="http://php.net/xsl">
<xsl:output method="html" encoding="utf-8" indent="yes"/>
 <xsl:template match="allusers">
  <html><body>
    <h2>Users</h2>
    <table>
    <xsl:for-each select="user">
      <tr><td>
        <xsl:value-of
             select="php:function('ucfirst',string(uid))"/>
      </td></tr>
    </xsl:for-each>
    </table>
  </body></html>
 </xsl:template>
</xsl:stylesheet>
EOB;
$xmldoc = new DOMDocument();
$xmldoc->loadXML($xml);
$xsldoc = new DOMDocument();
$xsldoc->loadXML($xsl);

$proc = new XSLTProcessor();
$proc->registerPHPFunctions();
$proc->importStyleSheet($xsldoc);
echo $proc->transformToXML($xmldoc);
?>