# 背景

公司要求对接微信一物一码功能进行二维码喷印。
微信文档：
https://developers.weixin.qq.com/doc/offiaccount/Unique_Item_Code/Unique_Item_Code_API_Documentation.html

# 上代码

这里token的获取使用了第三方库

`composer require overtrue/wechat`

附文档：https://packagist.org/packages/overtrue/wechat

```php
<?php

namespace app\weapp\controller;

use EasyWeChat\OfficialAccount\Application;
use GuzzleHttp\Client;
use think\Controller;

/**
 * @title 微信一物一码
 * @desc DOC：https://developers.weixin.qq.com/doc/offiaccount/Unique_Item_Code/Unique_Item_Code_API_Documentation.html#5
 * @author chenls (chenlisong1021@163.com>)
 * @create_time 2020-03-17 15:44:01
 */
class Qrcode extends Controller
{
    protected $app;
    protected $config;
    protected static $pass = "XXX";//微信会发到你的公众号邮箱

public function initialize()
    {
        $this->config = [
            'app_id' => 'XXX',
            'secret' => 'XXX',
            'response_type' => 'array',
        ];
        $this->app = new Application($this->config);
    }

/**
     * 下载一物一码
     * @return success
     */
    public function applycodedownload()
    {
        $app = $this->app;
        $application_id = 644504288;
        $accessToken = $app->access_token;
        $accessToken = $accessToken->getToken();
        $accessToken = $accessToken['access_token'];
        $url = "https://api.weixin.qq.com/intp/marketcode/applycodedownload";
        $client = new Client();
        $query['access_token'] = $accessToken;
        $postData = [
            'application_id' => $application_id,
            'code_start' => '0',
            'code_end' => '9999'
        ];
        $response = $client->request('POST', $url, ['query' => $query, 'json' => $postData]);
        $response = json_decode($response->getBody()->getContents(), true);
        $file_buffer = base64_decode($response['buffer']);
        $decyypt = openssl_decrypt($file_buffer, 'AES-128-CBC', self::$pass, OPENSSL_RAW_DATA, self::$pass);
        file_put_contents($application_id . ".txt", $decyypt);
        return "success";
    }

/**
     * 查询一物一码
     * 预计等待10分钟
     * @return {"errcode":0,"errmsg":"ok","application_id":644504288,"isv_application_id":"test00001","create_time":1584430326,"update_time":1584432000,"status":"FINISH","code_generate_list":[{"code_start":0,"code_end":9999}]}
     */
    public function applycodequery()
    {
        $app = $this->app;
        $accessToken = $app->access_token;
        $accessToken = $accessToken->getToken();
        $accessToken = $accessToken['access_token'];
        $url = "https://api.weixin.qq.com/intp/marketcode/applycodequery";
        $client = new Client();
        $query['access_token'] = $accessToken;
        $postData = [
            'application_id' => 644504288,
            'isv_application_id' => 'test00001'
        ];
        $response = $client->request('POST', $url, ['query' => $query, 'json' => $postData]);
        $response = json_decode($response->getBody()->getContents(), true);
        return $response;
    }

/**
     * 申请一物一码
     * @return {"errcode":0,"errmsg":"ok","application_id":644504288}
     */
    public function applycode()
    {
        $app = $this->app;
        $accessToken = $app->access_token;
        $accessToken = $accessToken->getToken();
        $accessToken = $accessToken['access_token'];
        $url = "https://api.weixin.qq.com/intp/marketcode/applycode";
        $client = new Client();
        $query['access_token'] = $accessToken;
        $postData = [
            'code_count' => 10000,
            'isv_application_id' => 'test00001'
        ];
        $response = $client->request('POST', $url, ['query' => $query, 'json' => $postData]);
        $response = json_decode($response->getBody()->getContents(), true);
        return $response;
    }
}

```

# 附录
关于一物一码二维码加解密可以参看我的另一篇文章<a href="http://chenls.me/blog/details.html?id=61" target="_blank">传送门</a>

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