php-doc-en/reference/xattr/functions/xattr-set.xml
2014-09-05 07:44:07 +00:00

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XML

<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<!-- Generated by xml_proto.php v2.0. Found in /scripts directory of phpdoc. -->
<refentry xml:id="function.xattr-set" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>xattr_set</refname>
<refpurpose>
Set an extended attribute
</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>bool</type><methodname>xattr_set</methodname>
<methodparam><type>string</type><parameter>filename</parameter></methodparam>
<methodparam><type>string</type><parameter>name</parameter></methodparam>
<methodparam><type>string</type><parameter>value</parameter></methodparam>
<methodparam choice="opt"><type>int</type><parameter>flags</parameter><initializer>0</initializer></methodparam>
</methodsynopsis>
<para>
This function sets the value of an extended attribute of a file.
</para>
&xattr.namespace;
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>filename</parameter></term>
<listitem>
<para>
The file in which we set the attribute.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>name</parameter></term>
<listitem>
<para>
The name of the extended attribute. This attribute will be created if
it doesn't exist or replaced otherwise. You can change this behaviour
by using the <parameter>flags</parameter> parameter.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>value</parameter></term>
<listitem>
<para>
The value of the attribute.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>flags</parameter></term>
<listitem>
<para>
<table>
<title>Supported xattr flags</title>
<tgroup cols="2">
<tbody>
<row>
<entry><constant>XATTR_CREATE</constant></entry>
<entry>Function will fail if extended attribute already exists.</entry>
</row>
<row>
<entry><constant>XATTR_REPLACE</constant></entry>
<entry>Function will fail if extended attribute doesn't exist.</entry>
</row>
<row>
<entry><constant>XATTR_DONTFOLLOW</constant></entry>
<entry>Do not follow the symbolic link but operate on symbolic link itself.</entry>
</row>
<row>
<entry><constant>XATTR_ROOT</constant></entry>
<entry>Set attribute in root (trusted) namespace. Requires root privileges.</entry>
</row>
</tbody>
</tgroup>
</table>
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
&return.success;
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title>Sets extended attributes on <filename>.wav</filename> file</title>
<programlisting role="php">
<![CDATA[
<?php
$file = 'my_favourite_song.wav';
xattr_set($file, 'Artist', 'Someone');
xattr_set($file, 'My ranking', 'Good');
xattr_set($file, 'Listen count', '34');
/* ... other code ... */
printf("You've played this song %d times", xattr_get($file, 'Listen count'));
?>
]]>
</programlisting>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>xattr_get</function></member>
<member><function>xattr_remove</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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