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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.



The file from which we get the attribute.


The name of the attribute.


Table 330. 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.

Return Values

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


Example 2624. Checks if system administrator has signed the file

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

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