php-doc-en/reference/xml/functions/xml-set-unparsed-entity-decl-handler.xml

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  <refentry id="function.xml-set-unparsed-entity-decl-handler">
   <refnamediv>
    <refname>xml_set_unparsed_entity_decl_handler</refname>
    <refpurpose>
     Set up unparsed entity declaration handler
    </refpurpose>
   </refnamediv>
   <refsect1>
    <title>Description</title>
     <methodsynopsis>
      <type>int</type><methodname>xml_set_unparsed_entity_decl_handler</methodname>
      <methodparam><type>int</type><parameter>parser</parameter></methodparam>
      <methodparam><type>string</type><parameter>handler</parameter></methodparam>
     </methodsynopsis>
    <para>
     Sets the unparsed entity declaration 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>
     This handler will be called if the XML parser encounters an
     external entity declaration with an NDATA declaration, like the
     following:
     <programlisting role="xml">
&lt;!ENTITY <parameter>name</parameter> {<parameter>publicId</parameter> | <parameter>systemId</parameter>} 
        NDATA <parameter>notationName</parameter>&gt;
     </programlisting>
    </para>
    <para>
     See <ulink url="&url.rec-xml;#sec-external-ent">section 4.2.2 of
     the XML 1.0 spec</ulink> for the definition of notation declared
     external entities.
    </para> 
    <para> The function named by
     <parameter>handler</parameter> must accept six parameters:
     <methodsynopsis>
       <methodname><replaceable>handler</replaceable></methodname>
       <methodparam><type>int</type><parameter>parser</parameter></methodparam>
       <methodparam><type>string</type><parameter>entityName</parameter></methodparam>
       <methodparam><type>string</type><parameter>base</parameter></methodparam>
       <methodparam><type>string</type><parameter>systemId</parameter></methodparam>
       <methodparam><type>string</type><parameter>publicId</parameter></methodparam>
       <methodparam><type>string</type><parameter>notationName</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>entityName</parameter></term>
       <listitem>
    <simpara>
     The name of the entity that is about to be defined.
    </simpara>
       </listitem>
      </varlistentry>
      <varlistentry>
       <term><parameter>base</parameter></term>
       <listitem><simpara>
     This is the base for resolving the system identifier
     (<parameter>systemId</parameter>) of the external
     entity.  Currently this parameter will always be set to
     an empty string.
    </simpara>
       </listitem>
      </varlistentry>
      <varlistentry>
       <term><parameter>systemId</parameter></term>
       <listitem>
    <simpara>
     System identifier for the external entity.
    </simpara>
       </listitem>
      </varlistentry>
      <varlistentry>
       <term><parameter>publicId</parameter></term>
       <listitem>
    <simpara> 
     Public identifier for the external entity.
    </simpara>
       </listitem>
      </varlistentry>
      <varlistentry>
       <term><parameter>notationName</parameter></term>
       <listitem>
    <simpara> 
     Name of the notation of this entity (see
     <function>xml_set_notation_decl_handler</function>).
    </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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