<?xml version="1.0" encoding="utf-8"?>
<refentry xml:id="function.fdatasync" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>fdatasync</refname>
  <refpurpose>Synchronizes data (but not meta-data) to the file</refpurpose>
 </refnamediv>
 
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>bool</type><methodname>fdatasync</methodname>
   <methodparam><type>resource</type><parameter>stream</parameter></methodparam>
  </methodsynopsis>
  <para>
   This function synchronizes <parameter>stream</parameter> contents to storage media, just like <function>fsync</function> does,
   but it does not synchronize file meta-data.
   Note that this function is only effectively different in POSIX systems.
   In Windows, this function is aliased to <function>fsync</function>.
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>stream</parameter></term>
     <listitem>
      &fs.validfp.all;
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   &return.success;
  </para>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title><function>fdatasync</function> example</title>
    <programlisting role="php">
<![CDATA[
<?php

$file = 'test.txt';

$stream = fopen($file, 'w');
fwrite($stream, 'test data');
fwrite($stream, "\r\n");
fwrite($stream, 'additional data');

fdatasync($stream);
fclose($stream);
?>
]]>
    </programlisting>
   </example>
  </para>
 </refsect1>
 
 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>fflush</function></member>
    <member><function>fsync</function></member>
   </simplelist>
  </para>
 </refsect1>

</refentry>
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