(PECL xattr >= 0.9.0)
xattr_list — Get a list of extended attributes
$filename, int $flags = 0): arrayThis functions gets a list of names of extended attributes 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。
filenameThe path of the file.
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. |
This function returns an array with names of extended attributes.
示例 #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);
}
?>