xattr_remove
(PECL xattr >= 0.9.0)
xattr_remove — Remove an extended attribute
说明
xattr_remove(string
$filename
, string $name
, int $flags
= 0): boolThis function removes an extended attribute of a file.
扩展的属性有两种 不同的命名空间:user
和 root。user 命名空间对所有用户均有效,而 root
命名空间仅对拥有 root 权限的用户有效。
xattr 默认在 user 命名空间上操作,但可使用
flags
参数进行更改。
参数
-
filename
-
The file from which we remove the attribute.
-
name
-
The name of the attribute to remove.
-
flags
-
Supported xattr flags 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.
返回值
成功时返回 true
, 或者在失败时返回 false
。
范例
示例 #1 Removes all extended attributes of a file
<?php
$file = 'some_file';
$attributes = xattr_list($file);
foreach ($attributes as $attr_name) {
xattr_remove($file, $attr_name);
}
?>
参见
- xattr_list() - Get a list of extended attributes
- xattr_set() - Set an extended attribute
- xattr_get() - Get an extended attribute
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