[PHP知识库]thinkphp 获取微信openid

<?php

namespace app\index\controller;

use app\panapi\model\Account;
use think\Controller;

class Wx extends Controller
{
    //
    private  $appid='appid';
    private  $secret='secret';
    private  $redirect_url='redirect_url';
    private  $url='https://open.weixin.qq.com/connect/oauth2/authorize';
    private  $url2='https://api.weixin.qq.com/sns/oauth2/access_token';
    public  function   get_code(){
        $account_id=$this->request->param('account_id',298);
        $v=Account::where('account_id',$account_id)->value('openid');
        if(!empty($v)){
            return json([
                'status'=>1,
                'msg'=>'已有微信id',
                'data'=> $v
            ]);
        }
        $params=[
            'appid'=>$this->appid,
            'response_type'=>'code',
            'scope'=>'snsapi_base',
        ];
        $params=http_build_query($params).'&redirect_uri='.urlencode($this->redirect_url).'&state='.$account_id.'&#wechat_redirect';
        //一定要要用这个跳转 不然请求页面返回为空
        $this->redirect($this->url.'?'.$params);
    }

    public  function  save_info(){
        $params=[
            'appid'=>$this->appid,
            'secret'=>$this->secret,
            'code'=>input('param.code'),
            'grant_type'=>'authorization_code'
        ];
       $res=panApi($this->url2,$params);
       $res=json_decode($res,true);
       $data1['openid']=$res['openid'];
       $data2['account_id']=input('param.state');
       Account::update($data1,$data2);
       return json([
           'status'=>1,
           'msg'=>'账户写入微信ID成功',
           'data'=> $data1['openid']
       ]);
    }
}

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