php中curl发送session

今天用amfphp做登录接口时发现 调试页面无法带过去sessionid,阅读amfphp BackOffice\ServiceCaller.php 发现他是靠curl向默认网关发送请求的

于是改造他的curl如下

function makeAmfphpJsonServiceCall($serviceName, $methodName, $parameters = array()) {
        $jsonEncodedParams = json_encode($parameters);
        $requestString = "{\"serviceName\":\"$serviceName\", \"methodName\":\"$methodName\", \"parameters\":$jsonEncodedParams}";
        //echo $requestString;

       //写死一个存放cookie的文件,只供单人调试使用
        $cookie_file=S_ROOT.'/tmp/cookie/mycookie.tmp';
        if(!file_exists($cookie_file)){
            $fp = fopen($cookie_file,'w+');
            fclose($fp);
        }
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL, $this->amfphpEntryPointUrl);
        curl_setopt($curl, CURLOPT_HTTPHEADER, array("Content-Type: application/json"));
        curl_setopt($curl, CURLOPT_POST, 1);

        //指定保存cookie的文件
        curl_setopt($curl, CURLOPT_COOKIEJAR, $cookie_file);

       //指定发送给服务器的cookie文件
        curl_setopt($curl, CURLOPT_COOKIEFILE, $cookie_file);
        curl_setopt($curl, CURLOPT_POSTFIELDS, $requestString);
        curl_setopt($curl, CURLOPT_HEADER, true);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($curl, CURLOPT_HEADER, false);
        $response = curl_exec($curl);
        $decoded = json_decode($response);
        //echo $response;
        if(!$decoded){
            throw new Exception("service called failed. server response: \n $response \nrequest: \n \n$requestString" );
        }
        return $decoded;
        
    }