xattr_supported
(PECL)
xattr_supported --
Check if filesystem supports extended attributes
说明
bool
xattr_supported ( string filename [, int flags] )
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
表格 1. 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).
例
例子 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 ... */
}
?>
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