xml-set-start-namespace-decl-handler.xml

<?xml version="1.0" encoding="utf-8"?>
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<refentry xml:id="function.xml-set-start-namespace-decl-handler" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>xml_set_start_namespace_decl_handler</refname>
  <refpurpose>
   Set up start namespace declaration handler
  </refpurpose>
 </refnamediv>

 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>true</type><methodname>xml_set_start_namespace_decl_handler</methodname>
   <methodparam><type>XMLParser</type><parameter>parser</parameter></methodparam>
   <methodparam><type class="union"><type>callable</type><type>string</type><type>null</type></type><parameter>handler</parameter></methodparam>
  </methodsynopsis>
  <para>
   Set a handler to be called when a namespace is declared. Namespace
   declarations occur inside start tags. But the namespace declaration start
   handler is called before the start tag handler for each namespace declared
   in that start tag.
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    &xml.parser.param;
    <varlistentry>
     <term><parameter>handler</parameter></term>
     <listitem>
      &xml.handler.description;
      <para>
       The signature of the handler must be:
       <methodsynopsis>
        <type>void</type><methodname><replaceable>handler</replaceable></methodname>
        <methodparam><type>XMLParser</type><parameter>parser</parameter></methodparam>
        <methodparam><type class="union"><type>string</type><type>false</type></type><parameter>prefix</parameter></methodparam>
        <methodparam><type>string</type><parameter>uri</parameter></methodparam>
       </methodsynopsis>
       <variablelist>
        &xml.handler.parser.param;
        <varlistentry>
         <term><parameter>prefix</parameter></term>
         <listitem>
          <simpara>
           The prefix is a string used to reference the namespace within an XML object.
           &false; if no prefix exists.
          </simpara>
         </listitem>
        </varlistentry>
        <varlistentry>
         <term><parameter>uri</parameter></term>
         <listitem>
          <simpara>
           Uniform Resource Identifier (URI) of namespace.
          </simpara>
         </listitem>
        </varlistentry>
       </variablelist>
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>
 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   &return.true.always;
  </para>
 </refsect1>

 <refsect1 role="changelog">
  &reftitle.changelog;
  <informaltable>
   <tgroup cols="2">
    <thead>
     <row>
      <entry>&Version;</entry>
      <entry>&Description;</entry>
     </row>
    </thead>
    <tbody>
     &xml.changelog.handler-param;
     &xml.changelog.parser-param;
    </tbody>
   </tgroup>
  </informaltable>
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>xml_set_end_namespace_decl_handler</function></member>
   </simplelist>
  </para>
 </refsect1>
</refentry>
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