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  <refentry id="function.vfprintf">
   <refnamediv>
    <refname>vfprintf</refname>
    <refpurpose>Write a formatted string to a stream</refpurpose>
   </refnamediv>
   <refsect1>
    <title>Description</title>
     <methodsynopsis>
      <type>int</type><methodname>vfprintf</methodname>
      <methodparam><type>resource</type><parameter>handle</parameter></methodparam>
      <methodparam><type>string</type><parameter>format</parameter></methodparam>
      <methodparam><type>array</type><parameter>args</parameter></methodparam>
     </methodsynopsis>
    <simpara>
     Write a string produced according to <parameter>format</parameter>
     to the stream resource specified by <parameter>handle</parameter>.
     <parameter>format</parameter> is described in the documentation for
     <function>sprintf</function>.
    </simpara>
    <simpara>
     Operates as <function>fprintf</function> but accepts an array of
     arguments, rather than a variable number of arguments.
    </simpara>
    <simpara>
     Returns the length of the outputted string.
    </simpara>
    <simpara>
     See also: <function>printf</function>,
     <function>sprintf</function>,
     <function>sscanf</function>, <function>fscanf</function>, 
     <function>vsprintf</function>, and
     <function>number_format</function>.
    </simpara>
   </refsect1>
   <refsect1>
    <title>Examples</title>
    <para>
     <example>
      <title><function>vfprintf</function>: zero-padded integers</title>
      <programlisting role="php">
<![CDATA[
<?php
if (!($fp = fopen('date.txt', 'w')))
    return;

vfprintf($fp, "%04d-%02d-%02d", array($year, $month, $day));
// will write the formatted ISO date to date.txt
?>
]]>
      </programlisting>
     </example>
    </para>
   </refsect1>
  </refentry>

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