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<refentry id="function.xml-set-default-handler">
 <refnamediv>
  <refname>xml_set_default_handler</refname>
  <refpurpose>Set up default handler</refpurpose>
 </refnamediv>
 <refsect1>
  <title>Description</title>
  <methodsynopsis>
   <type>bool</type><methodname>xml_set_default_handler</methodname>
   <methodparam><type>resource</type><parameter>parser</parameter></methodparam>
   <methodparam><type>callback</type><parameter>handler</parameter></methodparam>
  </methodsynopsis>
  <para>
   Sets the default handler function for the XML parser
   <parameter>parser</parameter>.<parameter>handler</parameter> is a
   string containing the name of a function that must exist when
   <function>xml_parse</function> is called for
   <parameter>parser</parameter>.
  </para>
  <para>
   The function named by <parameter>handler</parameter> must accept
   two parameters:
   <methodsynopsis>
    <methodname><replaceable>handler</replaceable></methodname>
    <methodparam><type>resource</type><parameter>parser</parameter></methodparam>
    <methodparam><type>string</type><parameter>data</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>data</parameter>
     </term>
     <listitem>
      <simpara>
       The second parameter, <parameter>data</parameter>, contains
       the character data.This may be the XML declaration,
       document type declaration, entities or other data for which
       no other handler exists.
      </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>
  <para>
   &true; is returned if the handler is set up, &false; if
   <parameter>parser</parameter> is not a parser.
  </para>
  &note.func-callback;
 </refsect1>
</refentry>

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