PHP5中文手册·Check if filesystem supports extended attributes -- 追寻梦想＞编程乐园＞PHP 编程

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

**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 ... */
}

?>

xattr_supported

说明

参数

返回值

范例

参见