微信小程序php生成小程序（传参）二维码图片

Posted 2022-12-10 智商不够_熬夜来凑

【实现功能】实现扫描生成的二维码打开指定小程序的任意界面（可带参数）

【代码】

<?php
error_reporting(0);
header('content-type:text/html;charset=utf-8');
//配置APPID、APPSECRET
$APPID = "";
$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/bindclient/bindclient?id=123","width"=> 150));

//POST参数
$result = httpRequest( $qcode, $param,"POST");
//生成二维码
file_put_contents("qrcode.png", $result);
$base64_image ="data:image/jpeg;base64,".base64_encode( $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;
  

?>