XSLTProcessor::registerPHPFunctionNS
Register a PHP function as namespaced XSLT function
Description
public void XSLTProcessor::registerPHPFunctionNS(string $namespaceURI, string $name, callable $callable)
This method enables the ability to use a PHP function as a namespaced XSLT functions within XSL stylesheets.
Parameters
-
namespaceURI
-
The URI of the namespace.
-
name
-
The local function name inside the namespace.
-
callable
-
The 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.
Errors/Exceptions
-
Throws a ValueError if
a callback name is not valid.
-
Throws a ValueError if
options contains an invalid option.
-
Throws a ValueError if
overrideEncoding is an unknown encoding.
-
Throws a TypeError if
a given callback is not callable.
Return Values
No value is returned.
Examples
Example #1 Simple PHP Function call from a stylesheet
<?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::registerPhpFunctionNS
- DOMXPath::registerPhpFunctions
- XSLTProcessor::registerPhpFunctions