hash-update-stream.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.hash-update-stream" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>hash_update_stream</refname>
  <refpurpose>Pump data into an active hashing context from an open stream</refpurpose>
 </refnamediv>
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>int</type><methodname>hash_update_stream</methodname>
   <methodparam><type>HashContext</type><parameter>context</parameter></methodparam>
   <methodparam><type>resource</type><parameter>stream</parameter></methodparam>
   <methodparam choice="opt"><type>int</type><parameter>length</parameter><initializer>-1</initializer></methodparam>
  </methodsynopsis>

 </refsect1>
 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>context</parameter></term>
     <listitem>
      <para>
       Hashing context returned by <function>hash_init</function>.
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>stream</parameter></term>
     <listitem>
      <para>
       Open file handle as returned by any stream creation function.
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>length</parameter></term>
     <listitem>
      <para>
       Maximum number of characters to copy from <parameter>stream</parameter>
       into the hashing context.
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   Actual number of bytes added to the hashing context from <parameter>stream</parameter>.
  </para>
 </refsect1>

 <refsect1 role="changelog">
  &reftitle.changelog;
  <para>
   <informaltable>
    <tgroup cols="2">
     <thead>
      <row>
       <entry>&Version;</entry>
       <entry>&Description;</entry>
      </row>
     </thead>
     <tbody>
      <row>
       <entry>7.2.0</entry>
       <entry>
        Accept <classname>HashContext</classname> instead of resource.
       </entry>
      </row>
     </tbody>
    </tgroup>
   </informaltable>
  </para>
 </refsect1>
 
 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title><function>hash_update_stream</function> example</title>
    <programlisting role="php">
<![CDATA[
<?php
$fp = tmpfile();
fwrite($fp, 'jumped over the lazy dog.');
rewind($fp);

$ctx = hash_init('sha256');
hash_update($ctx, 'The quick brown fox ');
hash_update_stream($ctx, $fp);
echo hash_final($ctx);
?>
]]>
    </programlisting>
    &example.outputs;
    <screen>
<![CDATA[
68b1282b91de2c054c36629cb8dd447f12f096d3e3c587978dc2248444633483
]]>
    </screen>
   </example>
  </para>
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>hash_init</function></member>
    <member><function>hash_update</function></member>
    <member><function>hash_update_stream</function></member>
    <member><function>hash_final</function></member>
   </simplelist>
  </para>
 </refsect1>

</refentry>
<!-- Keep this comment at the end of the file
Local variables:
mode: sgml
sgml-omittag:t
sgml-shorttag:t
sgml-minimize-attributes:nil
sgml-always-quote-attributes:t
sgml-indent-step:1
sgml-indent-data:t
indent-tabs-mode:nil
sgml-parent-document:nil
sgml-default-dtd-file:"~/.phpdoc/manual.ced"
sgml-exposed-tags:nil
sgml-local-catalogs:nil
sgml-local-ecat-files:nil
End:
vim600: syn=xml fen fdm=syntax fdl=2 si
vim: et tw=78 syn=sgml
vi: ts=1 sw=1
-->