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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision: 297028 $ -->
<refentry xmlns="http://docbook.org/ns/docbook" xml:id="function.xml-set-element-handler">
<refnamediv>
<refname>xml_set_element_handler</refname>
<refpurpose>Set up start and end element handlers</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>bool</type><methodname>xml_set_element_handler</methodname>
<methodparam><type>resource</type><parameter>parser</parameter></methodparam>
<methodparam><type>callback</type><parameter>start_element_handler</parameter></methodparam>
<methodparam><type>callback</type><parameter>end_element_handler</parameter></methodparam>
</methodsynopsis>
<para>
Sets the element handler functions for the XML <parameter>parser</parameter>.
<parameter>start_element_handler</parameter> and
<parameter>end_element_handler</parameter> are strings containing
the names of functions that must exist when <function>xml_parse</function>
is called for <parameter>parser</parameter>.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>parser</parameter></term>
<listitem>
<para>
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>start_element_handler</parameter></term>
<listitem>
<para>
The function named by <parameter>start_element_handler</parameter>
must accept three parameters:
<methodsynopsis>
<methodname><replaceable>start_element_handler</replaceable></methodname>
<methodparam><type>resource</type><parameter>parser</parameter></methodparam>
<methodparam><type>string</type><parameter>name</parameter></methodparam>
<methodparam><type>array</type><parameter>attribs</parameter></methodparam>
</methodsynopsis>
<variablelist>
<varlistentry>
<term><parameter>parser</parameter></term>
<listitem>
<simpara>
The first parameter, <replaceable>parser</replaceable>, is a
reference to the XML parser calling the handler.
</simpara>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>name</parameter></term>
<listitem>
<simpara>
The second parameter, <parameter>name</parameter>, contains the name
of the element for which this handler is called.If <link
linkend="xml.case-folding">case-folding</link> is in effect for this
parser, the element name will be in uppercase letters.
</simpara>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>attribs</parameter></term>
<listitem>
<simpara>
The third parameter, <parameter>attribs</parameter>, contains an
associative array with the element's attributes (if any).The keys
of this array are the attribute names, the values are the attribute
values.Attribute names are <link
linkend="xml.case-folding">case-folded</link> on the same criteria as
element names.Attribute values are <emphasis>not</emphasis>
case-folded.
</simpara>
<simpara>
The original order of the attributes can be retrieved by walking
through <parameter>attribs</parameter> the normal way, using
<function>each</function>.The first key in the array was the first
attribute, and so on.
</simpara>
</listitem>
</varlistentry>
</variablelist>
</para>
¬e.func-callback;
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>end_element_handler</parameter></term>
<listitem>
<para>
The function named by <parameter>end_element_handler</parameter>
must accept two parameters:
<methodsynopsis>
<methodname><replaceable>end_element_handler</replaceable></methodname>
<methodparam><type>resource</type><parameter>parser</parameter></methodparam>
<methodparam><type>string</type><parameter>name</parameter></methodparam>
</methodsynopsis>
<variablelist>
<varlistentry>
<term><parameter>parser</parameter></term>
<listitem>
<simpara>
The first parameter, <replaceable>parser</replaceable>, is a
reference to the XML parser calling the handler.
</simpara>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>name</parameter></term>
<listitem>
<simpara>
The second parameter, <parameter>name</parameter>, contains the name
of the element for which this handler is called.If <link
linkend="xml.case-folding">case-folding</link> is in effect for this
parser, the element name will be in uppercase letters.
</simpara>
</listitem>
</varlistentry>
</variablelist>
</para>
<para>
If a handler function is set to an empty string, or &false;, the handler
in question is disabled.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
&return.success;
</para>
</refsect1>
</refentry>
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