$filepath = __DIR__./d.txt;
$basename = pathInfo($filepath, PATHINFO_BASENAME);
$filesize = fileSize($filepath);
$fh = fopen($filepath, r);

#sftp协议, url是服务器全路径，且带文件名
$url = sftp://192.168.1.2/data/temp/.$basename;

// create curl resource
$ch = curl_init();

// set url
curl_setopt($ch, CURLOPT_URL, $url);

//return the transfer as a string
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

curl_setopt($ch, CURLOPT_HEADER, 0);

curl_setopt($ch, CURLOPT_USERPWD, root:123456); #ssh的 服务器的用户名和密码
curl_setopt($ch, CURLOPT_UPLOAD, true); #
curl_setopt($ch, CURLOPT_INFILE, $fh ); #文件句柄
curl_setopt($ch, CURLOPT_INFILESIZE, $filesize); #文件大小

$output = curl_exec($ch);

$message = curl_errno($ch) === CURLE_OK ? success : failure;
echo $message;

curl_close($ch);