public function up(){
    $toke = S('token');
    if (empty($token)) {
        $this->getaccess_token();
        $toke = S('token');
    }
    $token=json_decode($toke,true)['access_token'];
    $url="https://api.weixin.qq.com/cgi-bin/media/upload?access_token=".$token."&type=image";
    $data['type']='image';
    $data['media']='./Data/UploadFiles/product/20181016/1539656106182935.PNG';
    $postData=json_encode($data);

    $ch=curl_init();
    curl_setopt($ch,CURLOPT_URL,$url);
    curl_setopt($ch,CURLOPT_HEADER,0);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);//流的形势不直接输出
    //设置是通过post还是get方法
    curl_setopt($ch,CURLOPT_POST,1);
    //传递的变量
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER,FALSE);//不检查证书
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST,FALSE);//不检查证书名
    curl_setopt($ch,CURLOPT_POSTFIELDS,$postData);
    $da = curl_exec($ch);
    curl_close($ch);
    dump($da);die;

}

返回却是

string(70) "{"errcode":41005,"errmsg":"media data missing hint: [lVllaa02931335]"}"