如何使用PHP在Twitter中发布

// Set username and password
$username='myusername';
$password='*********';
// The message you want to send
$message = 'Nice to c all again.Have a nice day..';
// The twitter API address
$url='http://twitter.com/statuses/update.xml';
// Alternative JSON version
// $url = 'http://twitter.com/statuses/update.json';
// Set up and execute the curl process
$curl_handle = curl_init();
curl_setopt($curl_handle,CURLOPT_URL,$url);
curl_setopt($curl_handle,CURLOPT_CONNECTTIMEOUT,2);
curl_setopt($curl_handle,CURLOPT_RETURNTRANSFER,1);
curl_setopt($curl_handle,CURLOPT_POST,CURLOPT_POSTFIELDS,"status=".$message);
curl_setopt($curl_handle,CURLOPT_USERPWD,"$username:$password");
$buffer = curl_exec($curl_handle);
curl_close($curl_handle);
// check for success or failure
if (empty($buffer)) {
    echo 'Try again';
} else {
    echo 'success';
}

这个脚本正在返回一个成功的消息,但是当我查看我的Twitter账号时,没有发现任何tweets.

可能是什么问题呢？