微信开发笔记：生成带参数的公众号二维码

<?php
define("APPID", APPID);
define("APPSECRET", APPSECRET);

class wx_user_qr_code
{
    function __construct(){
        $this->wx_user_qr_code();
    }
    function wx_user_qr_code(){
    }
    function get_access_token(){
    $token_access_url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=" . APPID . "&secret=" . APPSECRET;
    $res = file_get_contents($token_access_url);
    $result = json_decode($res, true); 
    $access_token = $result[‘access_token‘];
    return $access_token;
}
function generate_qrcode($scene_id){
    $access_token = $this->get_access_token();
    $url = ‘https://api.weixin.qq.com/cgi-bin/qrcode/create?access_token=‘.$access_token;
    $parameters = array(
        "action_name"=>"QR_LIMIT_SCENE",
        "action_info"=>array("scene"=>array("scene_id"=>$scene_id))
    );
    $result = $this->postCurl(json_encode($parameters, true),$url);
    $return_data = json_decode($result,true);

    $ticket = $return_data["ticket"];
    $img_url = $return_data["url"];
    $codeurl = "https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket=".urlencode($ticket);
        
    $img = file_get_contents($codeurl);
    $file_name = "scene_id_".$scene_id."_".time().".jpg";
    file_put_contents(‘./user_affiliate_qr/‘.$file_name,$img);
    return $file_name;
}
function postCurl($send_data, $url, $second = 30){
        // 初始化curl
        $ch = curl_init();
        // 设置超时
        curl_setopt($ch, CURLOP_TIMEOUT, $second);
        // 这里设置代理，如果有的话
        // curl_setopt($ch,CURLOPT_PROXY, ‘8.8.8.8‘);
        // curl_setopt($ch,CURLOPT_PROXYPORT, 8080);
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
        // 设置header
        curl_setopt($ch, CURLOPT_HEADER, FALSE);
        // 要求结果为字符串且输出到屏幕上
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
        // post提交方式
        curl_setopt($ch, CURLOPT_POST, TRUE);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $send_data);
        // 运行curl
        
        $data = curl_exec($ch);
        curl_close($ch);
        // 返回结果
        if ($data) {
            curl_close($ch);
            return $data;
        } else {
            $error = curl_errno($ch);
            echo "curl出错，错误码:$error" . "<br>";
            echo "<a href=‘http://curl.haxx.se/libcurl/c/libcurl-errors.html‘>错误原因查询</a></br>";
            curl_close($ch);
            return false;
        }
    }    
}
?>