xattr_get

Get an extended attribute (PECL xattr:0.9-1.0)
string xattr_get ( string filename, string name [, int flags] )

This function gets the value of an extended attribute of a file.

Extended attributes have two different namespaces: user and root namespace. User namespace is available for all users while root namespace is available only for user with root privileges. xattr operates on user namespace by default, but you can change that using flags argument.

Parameters

filename

The file from which we get the attribute.

name

The name of the attribute.

flags

Table 330. 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.

Return Values

Returns a string containing the value or FALSE if the attribute doesn't exist.

Examples

Example 2624. Checks if system administrator has signed the file

copy to clipboard

<?php

$file = '/usr/local/sbin/some_binary';
$signature = xattr_get($file, 'Root signature', XATTR_ROOT);

/* ... check if $signature is valid ... */

?>