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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="xsltprocessor.registerphpfunctions" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>XSLTProcessor::registerPHPFunctions</refname>
<refpurpose>Enables the ability to use PHP functions as XSLT functions</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis role="XSLTProcessor">
<modifier>public</modifier> <type>void</type><methodname>XSLTProcessor::registerPHPFunctions</methodname>
<methodparam choice="opt"><type class="union"><type>array</type><type>string</type><type>null</type></type><parameter>functions</parameter><initializer>&null;</initializer></methodparam>
</methodsynopsis>
<para>
This method enables the ability to use PHP functions as XSLT functions
within XSL stylesheets.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>functions</parameter></term>
<listitem>
<para>
Use this parameter to only allow certain functions to be called from
XSLT.
</para>
<para>
This parameter can be one of the following:
a <type>string</type> (a function name),
an indexed <type>array</type> of function names,
or an associative <type>array</type> with keys being the function name
and the associated value being the <type>callable</type>.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
&return.void;
</para>
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
<row>
<entry>8.4.0</entry>
<entry>
It is now possible to use <type>callable</type>s for callbacks
when using <parameter>restrict</parameter> with <type>array</type>
entries.
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title>Simple PHP Function call from a stylesheet</title>
<programlisting role="php"><![CDATA[<?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);
?>]]></programlisting>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<simplelist>
<member><methodname>DOMXPath::registerPhpFunctions</methodname></member>
</simplelist>
</refsect1>
</refentry>
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sgml-parent-document:nil
sgml-default-dtd-file:"~/.phpdoc/manual.ced"
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-->
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