转载：ThinkPHP5 + 微信小程序 生成带参数的小程序码

前端（微信小程序）

wx.request({ 
        url: '', // 后端接口
        data: { 
            id: 3, // 传递的参数
            // path: 'pages/index/index', // 扫码进入小程序的页面路径
            width: 300 // 小程序码的大小
        },
        success: function(res) { 
            console.log(res.data);
        }
    })

后端（ThinkPHP5）

<?php
namespace app\api\controller;
class Code
{ 
    // 获取accesstoken
    public function getAccesstoken(){ 
        $appid = '';  // 你的小程序AppID
        $srcret = '';   // 你的小程序AppSecret
        $tokenUrl = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".$appid."&secret=".$srcret;
        $getArr = array();
        $tokenArr = json_decode($this->send_post($tokenUrl,$getArr,"GET"));
        $access_token = $tokenArr->access_token;
        return $access_token;
    }
    public function send_post($url, $post_data,$method='POST') { 
        $postdata = http_build_query($post_data);
        $options = array(
            'http' => array(
                'method' => $method,
                '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 $result;
    }
    public function api_notice_increment($url, $data){ 
        $ch = curl_init();
        $header=array('Accept-Language:zh-CN','x-appkey:114816004000028','x-apsignature:933931F9124593865313864503D477035C0F6A0C551804320036A2A1C5DF38297C9A4D30BB1714EC53214BD92112FB31B4A6FAB466EEF245710CC83D840D410A7592D262B09D0A5D0FE3A2295A81F32D4C75EBD65FA846004A42248B096EDE2FEE84EDEBEBEC321C237D99483AB51235FCB900AD501C07A9CAD2F415C36DED82','x-apversion:1.0','Content-Type:application/x-www-form-urlencoded','Accept-Charset: utf-8','Accept:application/json','X-APFormat:json');
        curl_setopt($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($ch, 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);
        if (curl_errno($ch)) { 
            return false;
        }else{ 
            return $tmpInfo;
        }
    }
    public function mpcode(){ 
        $id = input('id');
        $path = input('path');
        $width = input('width');
        // 参数
        $postdata['scene'] = $id;
        // 宽度
        $postdata['width'] = $width;
        // 扫码进入的页面路径
        $postdata['page'] = $path;
        // 线条颜色
        $postdata['auto_color']=false;
        // auto_color 为 false 时生效
        $postdata['line_color']=['r'=>'0','g'=>'0','b'=>'0'];
        // 是否有底色为true时是透明的
        $postdata['is_hyaline']=true;
        $post_data = json_encode($postdata);
        $access_token=$this->getAccesstoken();
        $url="https://api.weixin.qq.com/wxa/getwxacodeunlimit?access_token=".$access_token;
        $result=$this->api_notice_increment($url,$post_data);
        $data='data:image/png;base64,'.base64_encode($result);
        // 返回小程序码的base64
        return $data;
    }
}

PS：小程序未发布前不要传递小程序页面路径

原文路径：https://cssnb.com/index.php/archives/54/