xattr_supported
(PECL xattr >= 1.0.0)
xattr_supported — Check if filesystem supports extended attributes
说明
xattr_supported (
string
$filename
[,
int $flags
= 0 ] ) :
bool
This functions checks if the filesystem holding the given file supports extended attributes. Read access to the file is required.
参数
-
filename
-
The path of the tested file.
-
flags
-
Supported xattr flags XATTR_DONTFOLLOW
Do not follow the symbolic link but operate on symbolic link itself.
返回值
This function returns TRUE
if filesystem supports extended attributes, FALSE
if it doesn't and NULL
if it can't be determined (for example wrong path or lack of permissions to file).
范例
Example #1 xattr_supported() example
The following code checks if we can use extended attributes.
<?php
$file = 'some_file';
if (xattr_supported($file)) {
/* ... make use of some xattr_* functions ... */
}
?>