微信小程序生成二维码报错"errcode":40159,"errmsg":"invalid length for path, or the data is not json string rid: 617a1e61-38ad5e05-3246678b

小程序生成二维码会报错{errcode:40159,errmsg:invalid length for path, or the data is not json string rid: 617a1e61-38ad5e05-3246678b}原因是post提交的data不是json字符串，我们只是转为json即可;//

小程序生成二维码会报错

"{"errcode":40159,"errmsg":"invalid length for path, or the data is not json string rid: 617a1e61-38ad5e05-3246678b"}"

原因是post提交的data不是json字符串，我们只是转为json即可

 //获取二维码
 $codeurl = 'https://api.weixin.qq.com/cgi-bin/wxaapp/createwxaqrcode?access_token='.$result['access_token'];
 $param = [
        'path'=>'pages/goods/detail?id='.$id,
        'width'=>500
];
 $codeRes = $this->curlRequest($codeurl,json_encode($param));
dd($codeRes);