is-writable.xml

<?xml version="1.0" encoding="utf-8"?>
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<refentry xmlns="http://docbook.org/ns/docbook" xml:id="function.is-writable">
 <refnamediv>
  <refname>is_writable</refname>
  <refpurpose>Tells whether the filename is writable</refpurpose>
 </refnamediv>
 
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>bool</type><methodname>is_writable</methodname>
   <methodparam><type>string</type><parameter>filename</parameter></methodparam>
  </methodsynopsis>
  <para>
   Returns &true; if the <parameter>filename</parameter> exists and is
   writable.  The filename argument may be a directory name allowing you
   to check if a directory is writable.
  </para>
  <para>
   Keep in mind that PHP may be accessing the file as the user id
   that the web server runs as (often 'nobody').
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>filename</parameter></term>
     <listitem>
      <para>
       The filename being checked.
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>
 
 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   Returns &true; if the <parameter>filename</parameter> exists and is
   writable.  
  </para>
 </refsect1>

 <refsect1 role="errors">
  &reftitle.errors;
  &fs.emits.warning.on.failure;
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title><function>is_writable</function> example</title>
    <programlisting role="php">
<![CDATA[
<?php
$filename = 'test.txt';
if (is_writable($filename)) {
    echo 'The file is writable';
} else {
    echo 'The file is not writable';
}
?>
]]>
    </programlisting>
   </example>
  </para>
 </refsect1>

 <refsect1 role="notes">
  &reftitle.notes;
  
  &note.clearstatcache;
  &tip.fopen-wrapper.stat;
 </refsect1>
 
 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>is_readable</function></member>
    <member><function>file_exists</function></member>
    <member><function>fwrite</function></member>
   </simplelist>
  </para>
 </refsect1>

</refentry>

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