xattr_set
(PECL xattr >= 0.9.0)
xattr_set — Set an extended attribute
Description
$filename
, string $name
, string $value
[, int $flags
= 0
] ) : boolThis function sets the value of an extended attribute of a file.
Extended attributes have two different namespaces: user
and root. The user namespace is available to all users, while the root namespace
is available only to users with root privileges. xattr operates on the user
namespace by default, but this can be changed with the
flags
parameter.
Parameters
-
filename
-
The file in which we set the attribute.
-
name
-
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
flags
parameter. -
value
-
The value of the attribute.
-
flags
-
Supported xattr flags XATTR_CREATE
Function will fail if extended attribute already exists. XATTR_REPLACE
Function will fail if extended attribute doesn't exist. XATTR_DONTFOLLOW
Do not follow the symbolic link but operate on symbolic link itself. XATTR_ROOT
Set attribute in root (trusted) namespace. Requires root privileges.
Examples
Example #1 Sets extended attributes on .wav file
<?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'));
?>
English translation
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Document created the 30/01/2003, last modified the 26/10/2018
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References
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