如何使用PUT方法通过cURL / PHP将JSON数据发送到API

我需要在发送JSON数据时为此API提供一个方法.

这是我的参数
????$data = array(‘__ type’=>’urn：inin.com：connection：workstationSettings’);

这是我如何进行cURL调用

private function _makeCall($method,$uri,$data = false,$header = NULL,&$httpRespond = array())
{
    $ch = curl_init();
    $url = $this->_baseURL . $uri;

    if( 
           ($method == 'POST' || $method == 'PUT') 
        && $data
    ){
        $jsonString = json_encode( $data );
        curl_setopt( $ch,CURLOPT_POSTFIELDS,$jsonString );
    }

    if($method == 'POST'){
        curl_setopt($ch,CURLOPT_POST,true);
    } elseif( $method == 'PUT'){
        curl_setopt($ch,CURLOPT_PUT,true);
    } else {
        if ($data){
            $url = sprintf("%s?%s",$url,http_build_query($data));
        }
    }  

    //disable the use of cached connection
    curl_setopt($ch,CURLOPT_FRESH_CONNECT,true);

    //return the respond from the API
    curl_setopt($ch,CURLOPT_RETURNTRANSFER,true);

    //return the HEADER respond from the API
    curl_setopt($ch,CURLOPT_HEADER,true);

    //add any headers
    if(!empty($header)){
        curl_setopt($ch,CURLOPT_HTTPHEADER,$header);
    }

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

    //make the cURL call
    $respond = curl_exec($ch);

    //throw cURL exception
    if($respond === false){
        $errorNo = curl_errno($ch);
        $errorMessage = curl_error($ch);

        throw new ApiException($errorMessage,$errorNo);
    }   

    list($header,$body) = explode("rnrn",$respond,2);

    $httpRespond = $this->_http_parse_headers($header);

    $result = json_decode($body,true);

    //throw API exception
    if(  $this->_hasAPIError($result) ){
        $errorCode = 0;
        if(isset($result['errorCode'])){
            $errorCode = $result['errorCode'];
        }
        throw new ApiException($result['message'],$errorCode);
    }

    return $result;
}

问题是,每次API收到我的PUT请求时,它都会抱怨我在$data数组中传递了一个缺少的参数

我怎样才能正确地输出$jsonString？