Analysis of WeChat web page authorization library based on CI framework

This article mainly introduces the WeChat webpage authorization library based on the CI framework, and analyzes the related implementation techniques of the CI framework integrating WeChat authorization functions and controller calls in the form of examples. Friends in need can refer to the following

This article describes the WeChat web page authorization library based on the CI framework. Share it with everyone for your reference, the details are as follows:

Here is a demonstration of the WeChat web page authorization function based on the CI framework.

1. WeChat small class library, web page authorization is placed in the libraries folder

<?php
if ( ! defined(&#39;BASEPATH&#39;)) exit(&#39;No direct script access allowed&#39;);
Class Weixin
{
    private $appId;
    private $appSecret;
    function __construct()
    {
      $this->appId = trim(&#39;你的appid&#39;);
      $this->appSecret = trim(&#39;你的appsecret&#39;);
    }
    function redirect_url($redirect)
    {
      /*授权页面*/
      $url = "https://open.weixin.qq.com/connect/oauth2/authorize?appid=$this->appId&redirect_uri=$redirect&response_type=code&scope=snsapi_userinfo&state=STATE#wechat_redirect";
      return $url;
    }
    /* 通过code换取access_token*/
    function access_token($code)
    {
      /*获取到的code换取access_token和openid*/
      $post_url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=$this->appId&secret=$this->appSecret&code=$code&grant_type=authorization_code";
             // echo $post_url;exit();
      $return = $this->postdata($post_url);
      // print_r($return);exit();
      $access_token = $return[&#39;access_token&#39;];
      $openid = $return[&#39;openid&#39;];
      /*获取微信用户数据*/
      $get_userinfo = "https://api.weixin.qq.com/sns/userinfo?access_token=$access_token&openid=$openid&lang=zh_CN";
      $userinfo = json_decode(file_get_contents($get_userinfo));
      return $userinfo;
    }
    function eff($access_token,$openid)
    {
      /*检测access_token是否正确，errcode＝0 为正确*/
      $eff_url = "https://api.weixin.qq.com/sns/auth?access_token=$access_token&openid=$openid";
      $get_eff =json_decode(file_get_contents($eff_url));
      return $get_eff;
    }
    //通过curl方式提交code换取access_token数据
    function postdata($url)
    {
       header(&#39;Content-Type:text/html;charset=utf-8&#39;);
       // echo $url;exit();
      $curl = curl_init();
      curl_setopt($curl, CURLOPT_URL, $url);
      curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
      curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);
      curl_setopt($curl, CURLOPT_SSLVERSION, 1);
      // if (!empty($data)){
        // curl_setopt($curl, CURLOPT_POST, 1);
        // curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
      // }
      curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
      $output = curl_exec($curl);
      curl_close($curl);
      // var_dump($output);exit();
      // print_r($output);exit();
      $access = json_decode($output,true);
      return $access;
    }
    /*
      这个位置开始是控制器index()传入的微信用户资料处理
    */
      function save_session($data)
      {
        foreach ($data as $key => $value) {
          // $_SESSION[&#39;uid&#39;] = $value[&#39;uid&#39;];
          // $_SESSION[&#39;nickname&#39;] = $value[&#39;nickname&#39;];
          // $_SESSION[&#39;fullname&#39;] = $value[&#39;fullname&#39;];
          // $_SESSION[&#39;status&#39;] = $value[&#39;status&#39;];
          // $_SESSION[&#39;groups&#39;] = $value[&#39;groups&#39;];
          $_SESSION[$key] = $value;
        }
        return $_SESSION;
        // print_r($_SESSION);exit();
        // unset($_SESSION[0]);
      }
    function obj_to_arr($data)
    {
      // 进行转换成数组 使用 obj_to_arr方式
      $data = is_object($data)?get_object_vars($data):$data;
        foreach ($data as $key => $value)
        {
          $arr[$key] = $value;
        }
        return $arr;
    }
}

2. Obtain user information by exchanging code for access_token, controller File

<?php
if ( ! defined(&#39;BASEPATH&#39;)) exit(&#39;No direct script access allowed&#39;);
Class Coupon_index extends CI_Controller
{
    function __construct()
    {
      parent::__construct();
      $this->load->library(array(&#39;weixin&#39;,&#39;session&#39;));
      $this->load->helper(&#39;url&#39;);
      // $this->load->ldap_mod_del(link_identifier, dn, entry)
      $this->load->model(&#39;Coupon_model&#39;);
    }
    /**
     *优惠券主程序
     */
    function index()
    {
      $this->load->view(&#39;/coupon/index.html&#39;);
    }
    function User_exists()
    {
      /*
        检测改微信用户是否存在
        $user_arr 获取的是通过get_code返回的微信用户信息，此时的信息是通过微信服务器返回的，不能记录session
        $user std_obj模式，转换为数组
        $user_exists 扔入model中，检测数据表中是否存在该用户
        $redirect 走完流程后，跳转到首页
        if语句的作用，是 判断通过model返回数据表的信息，如果为空则把微信用户信息录入到表中，再读取出来，存进session。
        else 则数据表已经存在该用户，直接读取，存进session
        需要注意的是，使用foreach的原因，是二维数组转一维数组
      */
        $user_arr = $this->Get_code();
        // var_dump($user_arr);exit();
        $user = $this->weixin->obj_to_arr($user_arr);
        // var_dump($user);exit();
        // print_r($user);exit();
        $user_exists = $this->Coupon_model->CheckUser(&#39;cou_user&#39;,$user);
        // print_r($user_exists);exit();
        // $redirect = &#39;http://yourwebname.com/coupon/index.php/Coupon/Coupon_index/Coupon_Get/bid/1&#39;;
        // $return_url = $this->session->return_url;
        $redirect = &#39;http://yourwebname.com&#39;.$this->session->return_url;
        // echo $redirect;exit();
        if(empty($user_exists))
        {
           /*
         由于微信获取到的用户数据是stdclass对象格式
         所以需要进行转换成数组 使用 obj_to_arr方式
         */
        //加入自定义的字符进入数组
        unset($user[&#39;privilege&#39;]);
        $user_exists[&#39;nickname&#39;]   = $user[&#39;nickname&#39;];
        $user_exists[&#39;openid&#39;]    = $user[&#39;openid&#39;];
        $user_exists[&#39;language&#39;]   = $user[&#39;language&#39;];
        $user_exists[&#39;city&#39;]     = $user[&#39;city&#39;];
        $user_exists[&#39;country&#39;]    = $user[&#39;country&#39;];
        $user_exists[&#39;province&#39;]   = $user[&#39;province&#39;];
        $user_exists[&#39;headimgurl&#39;]  = $user[&#39;headimgurl&#39;];
        $user_exists[&#39;sex&#39;]      = $user[&#39;sex&#39;];
        $user_exists[&#39;fullname&#39;]   = $user[&#39;nickname&#39;];
        $user_exists[&#39;telphone&#39;]   = &#39;&#39;;
        $user_exists[&#39;login_ip&#39;]   =$this->input->ip_address();
        $user_exists[&#39;last_ip&#39;]    =$this->input->ip_address();
        $user_exists[&#39;groups&#39;]    = REGISTER_GROUP_ID;
        $user_exists[&#39;status&#39;]    = 1;
        $user_exists[&#39;login_time&#39;]  = date("Y-m-d");
         $insert_id = $this->Coupon_model->insert_one(&#39;cou_user&#39;,$user_exists);
        $user_exists[&#39;uid&#39;] = $insert_id;
        }
        else{
         $user_exists = $user_exists[0];
        }
        // $return_url = $this->session->back_url;
        // if(isset($return_url))header(&#39;location:&#39;.$return_url);
        /*由Coupon_idex中的Get_Coupon处理*/
        $this->session->set_userdata($user_exists);
        if(isset($this->session->return_url))header(&#39;location:&#39;.$this->session->return_url);
        // print_r($user_exists);exit();
        header(&#39;location:&#39;.$redirect);
    }
    function Coupon_start()
    {
      /*进入领取页面，需要先经过授权*/
      $redirect_url = &#39;Coupon/Coupon_index/User_exists&#39;;
      $redirect = urlencode(&#39;http://yourwebname.com/coupon/index.php/&#39;.$redirect_url);
      // $redirect = urlencode(&#39;http://yourwebname.com/coupon/index.php/Coupon/Coupon_index/Get_code&#39;);
      $return = $this->weixin->redirect_url($redirect);
       header(&#39;location:&#39;.$return);
    }
    public function Get_code()
    {
      if(isset($_GET[&#39;code&#39;]))
      {
        $code = $_GET[&#39;code&#39;];
        // echo $code;exit();
        $user_arr = $this->weixin->access_token($code);
        //跳转到用户检测中check_exists()去
        // echo $user_arr;exit();
        // var_dump($user_arr);
        return $user_arr;
      }else{
        //否则检测cookie中是否存在该用户，如果有，则return回首页
          echo &#39;error&#39;;
      }
     }
     public function Coupon_Get()
     {
      /*获取商家bid，读取相关信息*/
      // $b_name = $this->uri->segment(4, 0);
      $nickname = $this->session->nickname;
      $openid = $this->session->openid;
      $status = $this->session->status;
      $_SESSION[&#39;return_url&#39;] = $_SERVER[&#39;REQUEST_URI&#39;];
      // $this->session->set_userdata($return_url);
      // echo $this->session->return_url;exit();
      if(empty($nickname))header(&#39;location:&#39;.&#39;http://yourwebname.com/coupon/index.php/Coupon/Coupon_index/Coupon_start&#39;);
      $bid = $this->uri->segment(5, 0);
      /*扔进Coupon_model中，读取bid中的商家信息*/
      $content = $this->Coupon_model->Coupon_Business(&#39;cou_business&#39;,$bid);
      // print_r($content);
      // echo $bid;
      // echo $b_name;
      $data[&#39;bname&#39;]   = $content[&#39;bname&#39;];
      $data[&#39;discount&#39;]  = $content[&#39;discount&#39;];
      $data[&#39;bimg&#39;]    = $content[&#39;bimg&#39;];
      $data[&#39;contents&#39;]  = $content[&#39;contents&#39;];
      $data[&#39;amount&#39;]   = $content[&#39;amount&#39;];
      $data[&#39;nickname&#39;]  = $nickname;
      $data[&#39;status&#39;]   = $status;
      $data[&#39;js&#39;] = json_encode(array($content[&#39;bname&#39;],$content[&#39;discount&#39;],$nickname,$status));
      // echo $data[&#39;js&#39;];exit();
      // print_r($data);
      $this->load->view(&#39;/coupon/index.html&#39;,$data);
      // echo $nickname;
      // echo $status;
    }
}

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