public function upload(){    //获取上传文件信息，文件名称以自己实际上传文件名称为准    $fileinfo = $_FILE['filename'];    //请求参数，依据商户自己的参数为准    $requestParam['version'] = '10';    $requestParam['cmd_id'] = '122';    $requestParam['mer_cust_id'] = '666666';    $requestParam['attach_file'] = new \CURLFile($fileinfo['tmp_name'],$fileinfo['type'],$fileinfo['name']);    //发起请求    $param = [        'requestData'  => [            'cmd_id' => $requestParam['cmd_id'],            'mer_cust_id' => $requestParam['mer_cust_id'],            'version' => $requestParam['version'],            'attach_file' => $requestParam['attach_file'],        ],        'headers' => ['Content-type' => 'multipart/form-data;charset=UTF-8']    ];    $is_upload = 1;    $requestRes = $this->request($param,$is_upload);            return $requestRes ;}

private function request($param, $is_upload=0) {    // 请求接口所以参数初始化    $data = [        'url' => $this->apiUrl, // 接口 url        'requestData' => $is_upload ? $param['requestData'] : http_build_query($param['requestData']), // 请求接口参数        'headers' => $param['headers']    ];            //print_r($data); //debug 打印接口传输数据            $res = $this->httpPostRequest($data['url'], $data['headers'], $data['requestData']);    if (empty($res) || $res['info']['http_code'] != '200') {        $this->json_ret('20006','http request error',[$res['error']]);    }            return [        'status' => $res['info']['http_code'],        'body' => $res['body']    ];}

//curl post 请求 private function httpPostRequest($url = '', $header = array(), $requestData = array()) {    $curl = curl_init();    curl_setopt($curl, CURLOPT_HTTPHEADER, $header);    curl_setopt($curl, CURLOPT_URL, $url);    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);    curl_setopt($curl, CURLOPT_POST, true);    curl_setopt($curl, CURLOPT_POSTFIELDS, $requestData);    $res = curl_exec($curl);    $info = curl_getinfo($curl);    $error = curl_error($curl);    curl_close($curl);    return [        'body' => $res,        'info' => $info,        'error' => $error,    ];}