php-doc-en/reference/filesystem/functions/umask.xml

<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.9 $ -->
<!-- splitted from ./en/functions/filesystem.xml, last change in rev 1.2 -->
  <refentry id="function.umask">
   <refnamediv>
    <refname>umask</refname>
    <refpurpose>Changes the current umask</refpurpose>
   </refnamediv>
   <refsect1>
    <title>Description</title>
     <methodsynopsis>
      <type>int</type><methodname>umask</methodname>
      <methodparam choice="opt"><type>int</type><parameter>mask</parameter></methodparam>
     </methodsynopsis>
    <para>
     <function>umask</function> sets PHP's umask to 
     <parameter>mask</parameter> &amp; 0777 and returns the old
     umask. When PHP is being used as a server module, the umask
     is restored when each request is finished.
    </para>
    <para>
     <function>umask</function> without arguments simply returns the
     current umask.
    </para>
    <note>
     <para>
      Avoid using this function in multithreaded webservers. It is better to
      change the file permissions with <function>chmod</function> after
      creating the file. Using <function>umask</function> can lead to
      unexpected behavior of concurrently running scripts and the webserver
      itself because they all use the same umask.
     </para>
    </note>
    <para>
     <example>
      <title><function>umask</function> example</title>
      <programlisting role="php">
<![CDATA[
<?php
$old = umask(0);
chmod("/path/some_dir/some_file.txt", 0755);
umask($old);

// Checking
if ($old != umask()) {
    die('An error occured while changing back the umask');
}
?>
]]>
      </programlisting>
     </example>
    </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:"../../../../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
-->