php curl binary 文件上传

public function upload($url = "", $file_path = "")
    {
          
   
        $curl = curl_init();
        curl_setopt_array($curl, array(
            CURLOPT_URL => $url,
            CURLOPT_RETURNTRANSFER => true,
            CURLOPT_ENCODING => ,
            CURLOPT_MAXREDIRS => 10,
            CURLOPT_TIMEOUT => 0,
            CURLOPT_FOLLOWLOCATION => true,
            CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
            CURLOPT_SSL_VERIFYHOST => false,
            CURLOPT_SSL_VERIFYPEER => false,
            CURLOPT_CUSTOMREQUEST => PUT,
            CURLOPT_POSTFIELDS => file_get_contents($file_path),
            CURLOPT_HTTPHEADER => array(
                Content-Type: application/octet-stream
            ),
        ));
        $output = curl_exec($curl);
        $error = curl_errno($curl);
        if ($error) {
          
   
            throw new exception("请求发生异常情况" . curl_strerror($error) );
        }
        $curlInfo = curl_getinfo($curl);
        curl_close($curl);
        if ($curlInfo[http_code] == 200) {
          
   
            return true;
        }else{
          
   
            throw new PrintException("文件上传打印机云端失败");
        }
    }