如何上传远程图片啊，

include_once('upyun.class.php');
$fb=fopen('http://www.baidu.com/img/bdlogo.png','rb');
$filename='/video/test.jpg';
$upload = new UpYun('test', 'test', 'test123');
$upload ->writeFile("$filename", $fb, True);
fclose($fb);

我上传完报错什么原因呢，

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已经解决了：
include_once('upyun.class.php');
$fb=file_get_contents('http://www.baidu.com/img/bdlogo.png');
$filename='/video/test.jpg';
$upload = new UpYun('test', 'test', 'test123');
$upload ->writeFile("$filename", $fb, True);
fclose($fb);