Qiniu cloud storage-PHP-sdk cannot obtain the list file. How can this problem be solved?

The Code is as follows {code ...} returns an error string & #039; EOF & #039; (length3) Where is the error? PS: both the ASB accounts are correct. The error code is as follows:

require_once('php-sdk-master/qiniu/rs.php');$bucket = "**";$accessKey = '**';$secretKey = '**';Qiniu_SetKeys($accessKey, $secretKey);function fileList() {    global $bucket;    require_once('php-sdk-master/qiniu/rsf.php');    $client = new Qiniu_MacHttpClient(null);    list($items, $marker,  $err) = Qiniu_RSF_ListPrefix($client, $bucket);    if ($err !== null)     {        var_dump($err);    }     else     {        var_dump($items);    }}fileList();

An error is returned.

String 'eof '(length = 3)

What is an error?
PS: the ASB account is correct. This ensures no error.

Reply content:

The Code is as follows:

require_once('php-sdk-master/qiniu/rs.php');$bucket = "**";$accessKey = '**';$secretKey = '**';Qiniu_SetKeys($accessKey, $secretKey);function fileList() {    global $bucket;    require_once('php-sdk-master/qiniu/rsf.php');    $client = new Qiniu_MacHttpClient(null);    list($items, $marker,  $err) = Qiniu_RSF_ListPrefix($client, $bucket);    if ($err !== null)     {        var_dump($err);    }     else     {        var_dump($items);    }}fileList();

An error is returned.

String 'eof '(length = 3)

What is an error?
PS: the ASB account is correct. This ensures no error.

This should not be an error, just printed information, indicating that the list has ended, specifically you can view the https://github.com/qiniu/php-sdk/blob/master/qiniu/rsf.php file top comments.