XSLTProcessor::registerPHPFunctionNS
PHP function
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(PHP >= 8.4.0)
Register a PHP function as namespaced XSLT function
Description
XSLTProcessor::registerPHPFunctionNS(string $namespaceURI, string $name, callable $callable): void
This method enables the ability to use a PHP function as a namespaced XSLT functions within XSL stylesheets.
Parameters
namespaceURIThe URI of the namespace.
nameThe local function name inside the namespace.
callableThe PHP function to call when the XSL function gets called within the stylesheet. When a node list is passed as parameter to the callback, the argument becomes an array containing the matched dom nodes.
Return Values
Void
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:my="urn:my.ns">
<xsl:output method="html" encoding="utf-8" indent="yes"/>
<xsl:template match="allusers">
<html><body>
<h2><xsl:value-of select="my:count(user/uid)" /> users</h2>
<table>
<xsl:for-each select="user">
<tr>
<td>
<xsl:value-of select="my:uppercase(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->registerPHPFunctionNS('urn:my.ns', 'uppercase', strtoupper(...));
$proc->registerPHPFunctionNS('urn:my.ns', 'count', fn (array $arg1) => count($arg1));
$proc->importStyleSheet($xsldoc);
echo $proc->transformToXML($xmldoc);
?>See Also
DOMXPath::registerPhpFunctionNSDOMXPath::registerPhpFunctionsXSLTProcessor::registerPhpFunctions