怎么样通过微信小程序PHP生成参数二维码？

$tokenUrl="https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".$this->appid."&secret=".$this->secret;
  $getArr=array();
  $tokenArr=json_decode($this->send_post($tokenUrl,$getArr,"GET"));
  $access_token=$tokenArr->access_token;

function send_post($url, $post_data,$method='POST') {
  $postdata = http_build_query($post_data);
  $options = array(
   'http' => array(
    'method' => $method, //or GET
    'header' => 'Content-type:application/x-www-form-urlencoded',
    'content' => $postdata,
    'timeout' => 15 * 60 // 超时时间（单位:s）
   )
  );
  $context = stream_context_create($options);
  $result = file_get_contents($url, false, $context);
  return $result;
 }

$path="pages/index?query=1";
  $width=430;
  $post_data='{"path":"'.$path.'","width":'.$width.'}';
  $url="https://api.weixin.qq.com/cgi-bin/wxaapp/createwxaqrcode?access_token=".$access_token;
  $result=$this->api_notice_increment($url,$post_data);

function api_notice_increment($url, $data){
  $ch = curl_init();
  $header = "Accept-Charset: utf-8";
  curl_setopt($ch, CURLOPT_URL, $url);
  curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
  curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
  curl_setopt($curl, CURLOPT_HTTPHEADER, $header);
  curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (compatible; MSIE 5.01; Windows NT 5.0)');
  curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
  curl_setopt($ch, CURLOPT_AUTOREFERER, 1);
  curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  $tmpInfo = curl_exec($ch);
  //   var_dump($tmpInfo);
  //  exit;
  if (curl_errno($ch)) {
   return false;
  }else{
   // var_dump($tmpInfo);
   return $tmpInfo;
  }
 }

file_put_contents($filepath, $result)