xattr_list
(PECL)
xattr_list --
Get a list of extended attributes
说明
array
xattr_list ( string filename [, int flags] )
This functions gets a list of names of extended attributes of a file.
扩展的属性有两个不同的名字空间：user
和 root 名字空间。user 名字空间对所有用户均有效，而 root 名字空间仅对拥有 root 权限的用户有效。xattr
默认在 user 名字空间上进行操作，但是可以使用 flags 参数进行更改。
参数
- filename
The path of the file.
- flags
表格 1. 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
This function returns an array with names of extended attributes.
范例
例子 1. Prints names of all extended attributes of file
<?php
$file = 'some_file';
$root_attributes = xattr_list($file, XATTR_ROOT);
$user_attributes = xattr_list($file);
echo "Root attributes: \n";
foreach ($root_attributes as $attr_name) {
printf("%s\n", $attr_name);
}
echo "\n User attributes: \n";
foreach ($attributes as $attr_name) {
printf("%s\n", $attr_name);
}
?>
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