(PECL xattr:0.9-1.0)
xattr_set — Set an extended attribute
This function sets the value of an extended attribute of a file.
擴充功能的屬性有兩個不同的名稱空間:user 和 root 名稱空間。user 名稱空間對所有用戶均有效,而 root 名稱空間僅對擁有 root 權限的用戶有效。xattr 預設在 user 名稱空間上進行操作,但是可以使用 flags 參數進行更改。
The file in which we set the attribute.
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.
The value of the attribute.
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. |
如果成功則回傳 TRUE,失敗則回傳 FALSE。
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'));
?>