PHP开发微信登录与第三方网站绑定（微信开放平台）

PHP开发教程：通过微信开放平台实现网站微信登录功能与微信绑定，本文详细分析了微信授权登录功能的具体操作步骤与相关实现技巧。

<?php
namespace App\Http\Controllers;
 
use app\admin\model\Weixin;
use app\admin\model\User;
 
class WeixinController extends Controller{
    //attribute------开放平台获取
    private $appid = "your APPID";
    private $appsecert = "your APPSECERT";
    //redirect_uri,需要是跳到具体的页面处理，并且要在开放平台创建应用的授权回调域下面
    private $redirect_uri = "http://www.vipshare8.com/wxGetCode";
 
    //login
    public function wxLogin(){
        $appid = $this->appid;
        $redirect_uri = urlencode($this->redirect_uri);
        $scope = "snsapi_login";
        $state = "wxLogin";
        $url = "https://open.weixin.qq.com/connect/qrconnect?appid=".$appid."&redirect_uri=".$redirect_uri."&response_type=code&scope=".$scope."&state=".$state."#wechat_redirect";
        return redirect($url);
    }
 
    //bind
    public function wxBind(){
        $appid = $this->appid;
        $redirect_uri = urlencode($this->redirect_uri);
        $scope = "snsapi_login";
        $state = "wxBind";
        $url = "https://open.weixin.qq.com/connect/qrconnect?appid=".$appid."&redirect_uri=".$redirect_uri."&response_type=code&scope=".$scope."&state=".$state."#wechat_redirect";
        return redirect($url);
    }
 
    //reback url-->wxGetCode
    public function wxGetCode(){
        $code = $this->request->get('code', '');
        $state = $this->request->get('state', '');
        if($state === 'wxLogin'){
            $this->loginWeixin($code);
        }elseif($state === 'wxBind'){
            $this->bindWeixin($code);
        }else{
            return redirect("http://www.vipshare8.com");
        }
    }
 
    //loginWeixin
    private function loginWeixin($code){
        $appid = $this->appid;
        $appsecert = $this->appsecert;
        $url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=".$appid."&secret=".$appsecert."&code=".$code."&grant_type=authorization_code";
 
        //curl模拟get请求，获取结果
        $res = $this->http_curl($url);
 
        //转化为数组
        $return_data = json_decode($res,true);
        $openid = $return_data['openid'];
 
        //openid存在，直接登录，openid不存在，先注册再登录
        $result = User::where('wx_openid',$openid)->find();
        if($result){
            //login
            session('admin', $result);
            $jump_url = 'http://www.vipshare8.com/accountSettings';
            echo "<script>window.location.href='".$jump_url."'</script>";
            return redirect('http://www.vipshare8.com/accountSettings');
        }else{
            //转化为数组
            $access_token = $return_data['access_token'];
 
            //获取用户基本信息
            $getInfoUrl = "https://api.weixin.qq.com/sns/userinfo?access_token=".$access_token."&openid=".$openid."&lang=zh_CN";
            $userInfo = $this->http_curl($getInfoUrl);
            $weixins = json_decode($userInfo);
 
            //判断weixins表里面是否存在该条数据
            $weixins_result = Weixin::where('openid',$openid)->find();
            if(empty($weixins_result)){
                //插入数据
                Weixin::create([
                    'openid'=>$weixins->openid,
                    'nickname'=>$weixins->nickname,
                    'sex'=>$weixins->sex,
                    'city'=>$weixins->city,
                    'province'=>$weixins->province,
                    'country'=>$weixins->country,
                    'headimgurl'=>$weixins->headimgurl,
                ]);
            }
 
            //Register and login
            $user = new User();
            $arr['name'] = $weixins->nickname;
            $arr['email'] = $openid."@fake.com";
            $arr['password'] = "passwd";
            $arr['phone'] = substr($openid,8);
            $arr['wx_openid'] = $openid;
            $insertId = $user->insertGetId($arr);
            $jump_url = 'http://www.vipshare8.com/accountSettings';
            echo "<script>window.location.href='".$jump_url."'</script>";
            return redirect('http://www.vipshare8.com/accountSettings');
        }
 
    }
 
    //bindWeixin
    private function bindWeixin($code){
        $appid = $this->appid;
        $appsecert = $this->appsecert;
        $url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=".$appid."&secret=".$appsecert."&code=".$code."&grant_type=authorization_code";
 
        //curl模拟get请求，获取结果
        $res = $this->http_curl($url);
 
        //转化为数组
        $return_data = json_decode($res, true);
        $access_token = $return_data['access_token'];
        $openid = $return_data['openid'];
 
        //openid存在，提示需要解绑其他账号，openid不存在，先补充信息到weixins表再绑定
        $result = User::where('wx_openid',$openid)->find();
        if($result){
            $jump_url = 'http://www.vipshare8.com/wxBindError';
            echo "<script>window.location.href='".$jump_url."'</script>";
            return redirect('http://www.vipshare8.com/wxBindError');
 
        }else{
            $user_id = session('admin.id');
            $user = User::find($user_id);
            $user->wx_openid = $openid;
            $user->save();
 
            //判断weixins表里面是否存在该条数据
            $weixins_result = Weixin::where('openid',$openid)->find();
            if(empty($weixins_result)){
                //获取用户基本信息
                $getInfoUrl = "https://api.weixin.qq.com/sns/userinfo?access_token=".$access_token."&openid=".$openid."&lang=zh_CN";
 
                $userInfo = $this->http_curl($getInfoUrl);
                $weixins = json_decode($userInfo);
                Weixin::create([
                    'openid'=>$weixins->openid,
                    'nickname'=>$weixins->nickname,
                    'sex'=>$weixins->sex,
                    'city'=>$weixins->city,
                    'province'=>$weixins->province,
                    'country'=>$weixins->country,
                    'headimgurl'=>$weixins->headimgurl,
                ]);
            }
        }
        $jump_url = 'http://www.vipshare8.com/accountSettings';
        echo "<script>window.location.href='".$jump_url."'</script>";
        return redirect('http://www.vipshare8.com/accountSettings');
    }
 
    //wxBindError
    public function wxBindError(){
        $wxBindError = '该微信号已被绑定云享客账号，如需更改请到之前账号解除绑定';
        return view("weixin.wxBindError",['information'=>$wxBindError]);
    }
 
    //解绑
    public function wxUnbind(){
        //users表里面wx_openid字段清空
        $user_id = session('admin.id');
        $user = User::find($user_id);
        if(!preg_match("/^1\d{10}$/",$user->phone)){
            $wxBindError = '请认证手机号之后再解除绑定微信';
            return view("weixin.wxBindError",['information'=>$wxBindError]);
        }else{
            $user->wx_openid = '0';
            $user->save();
 
            return redirect('/accountSettings');
        }
 
    }
 
    //curl模拟get请求
    private function http_curl($url){
        $curlobj = curl_init();
        curl_setopt($curlobj, CURLOPT_URL, $url);
        curl_setopt($curlobj, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($curlobj, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($curlobj, CURLOPT_SSL_VERIFYHOST, FALSE);
 
        $output = curl_exec($curlobj);
        curl_close($curlobj);
 
        return $output;
    }
}