微信小程序生成二维码并且扫码跳转并且携带参数

话不多说，直接上代码，直接把APPID和APPSECRET改成自己的就能用了

<?php
 
header('content-type:text/html;charset=utf-8');
 
//配置APPID、APPSECRET
 
$APPID = "APPID";
 
$APPSECRET =  "APPSECRET";
 
//获取access_token
 
$access_token = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$APPID&secret=$APPSECRET";
 
//缓存access_token
 
 session_start();
 
 $_SESSION['access_token'] = "";
 
 $_SESSION['expires_in'] = 0;
 
 $ACCESS_TOKEN = "";
 
 if(!isset($_SESSION['access_token']) || (isset($_SESSION['expires_in']) && time() > $_SESSION['expires_in'])) {
 
     $json = httpRequest( $access_token );
 
     $json = json_decode($json,true);
 
     // var_dump($json);
 
     $_SESSION['access_token'] = $json['access_token'];
 
     $_SESSION['expires_in'] = time()+7200;
 
     $ACCESS_TOKEN = $json["access_token"];
 
 }else{
 
     $ACCESS_TOKEN =  $_SESSION["access_token"];
 
 }
 
//构建请求二维码参数
 
//path是扫描二维码跳转的小程序路径，可以带参数?id=xxx
 
//width是二维码宽度
 
$qcode ="https://api.weixin.qq.com/cgi-bin/wxaapp/createwxaqrcode?access_token=$ACCESS_TOKEN";
 
$param = json_encode(array("path"=>"pages/index/index?id=123","width"=> 150));
 
//POST参数
 
$result = httpRequest( $qcode, $param,"POST");
 
//生成二维码
file_put_contents("./qrcode.png", $result);
 
//把请求发送到微信服务器换取二维码
 
  function httpRequest($url, $data='', $method='GET'){
 
    $curl = curl_init();
 
    curl_setopt($curl, CURLOPT_URL, $url);
 
    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, 0);
 
    curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 0);
 
    curl_setopt($curl, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);
 
    curl_setopt($curl, CURLOPT_FOLLOWLOCATION, 1);
 
    curl_setopt($curl, CURLOPT_AUTOREFERER, 1);
 
    if($method=='POST')
 
    {
 
        curl_setopt($curl, CURLOPT_POST, 1);
 
        if ($data != '')
 
        {
 
            curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
 
        }
 
    }
 
    curl_setopt($curl, CURLOPT_TIMEOUT, 30);
 
    curl_setopt($curl, CURLOPT_HEADER, 0);
 
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
 
    $result = curl_exec($curl);
 
    curl_close($curl);
 
    return $result;
 
  }
 
?>