php-doc-en/reference/xml/functions/xml-set-character-data-handler.xml

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  <refentry id="function.xml-set-character-data-handler">
   <refnamediv>
    <refname>xml_set_character_data_handler</refname>
    <refpurpose>set up character data handler</refpurpose>
   </refnamediv>
   <refsect1>
    <title>Description</title>
    <methodsynopsis>
     <type>bool</type><methodname>xml_set_character_data_handler</methodname>
     <methodparam><type>resource</type><parameter>parser</parameter></methodparam>
     <methodparam><type>callback</type><parameter>handler</parameter></methodparam>
    </methodsynopsis>
    <para>
     Sets the character data 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 as a string.
        </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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