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xattr_set
Set an extended attribute
(PECL xattr:0.9-1.0)
bool xattr_set ( string filename, string name, string value [, int flags] )
This function sets the value of an extended attribute of a file.
Extended attributes have two different namespaces: user and root namespace. User namespace is available for all users while root namespace is available only for user with root privileges. xattr operates on user namespace by default, but you can change that using flags argument.
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
Table 333. Supported xattr flags
XATTR_CREATEFunction will fail if extended attribute already exists. XATTR_REPLACEFunction will fail if extended attribute doesn't exist. XATTR_DONTFOLLOWDo not follow the symbolic link but operate on symbolic link itself. XATTR_ROOTSet attribute in root (trusted) namespace. Requires root privileges.
Examples
Example 2627. 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'));
?>
See Also
| xattr_get() |
| xattr_remove() |