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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_DONTFOLLOWDo not follow the symbolic link but operate on symbolic link itself.
XATTR_ROOTSet 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);
}

?>

参见

xattr_get()


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