Laravel 集成微信用户登录和绑定的实现

<?php
namespace App\Helpers;
use GuzzleHttp\Client;
use Illuminate\Support\Arr;
class WechatAppUtils
{
  protected $client = null;
  protected $config = [];
  public function __construct()
  {
    $this->config = [
      'wechat_app' => [
        'appid' => env('WECHAT_APPID'),  //审核通过的APPID
        'secret' => env('WECHAT_SECRET'),  //应用APP SECRET 详情见上图
      ],
      'time_out'  => 5,
    ];
    $this->client = new Client([
      'time_out' => $this->config['time_out'],
    ]);
  }
  /**
   * 获取微信用户access_token
   *
   * @param [String] $code
   * @return Array
   */
  public function accessToken($code)
  {
    $accessTokenUrl = 'https://api.weixin.qq.com/sns/oauth2/access_token';
    $response = $this->client->request('GET', $accessTokenUrl, [
      'query' => [
        'grant_type' => 'authorization_code',
        'code'    => $code,
        'appid'   => Arr::get($this->config, 'wechat_app.appid'),
        'secret'   => Arr::get($this->config, 'wechat_app.secret'),
      ],
    ]);
    $result = $response->getbody()->getContents();
    return empty($result) ? null : json_decode($result, true);
  }
  /**
   * 微信用户信息
   *
   * @param [String] $accessToken
   * @param [String] $openId
   * @return Array
   */
  public function userInfo($accessToken, $openId)
  {
    $userInfoUrl = 'https://api.weixin.qq.com/sns/userinfo';
    $response = $this->client->request('GET', $userInfoUrl, [
      'query' => [
        'access_token' => $accessToken,
        'openid'    => $openId,
        'lang'     => 'zh_CN',
      ],
    ]);
    $result = $response->getbody()->getContents();
    return empty($result) ? null : json_decode($result, true);
  }
}

composer require guzzlehttp/guzzle

Schema::create('o_auths', function (Blueprint $table) {
  $table->increments('id');
  $table->unsignedInteger('user_id')->index()->comment('用户ID');
  $table->morphs('o_auth');
  $table->json('data')->nullable()->comment('授权信息');
  $table->timestamps();
});

function wechat(User $user, $code)
{
  $utils = new WechatAppUtils;
  //获取微信token
  $accessTokens = $utils->accessToken($code);
  throw_if(!Arr::has($accessTokens, ['unionid', 'openid']), Exception::class, '授权失败,请稍后再试!');
  //建立oauth关联
  $oAuth = OAuth::firstOrNew(['oauth_type' => 'wechat', 'oauth_id' => $accessTokens['openid']]);
  throw_if(isset($oAuth->id),Exception::class,'该微信已绑定,请直接登录!');
  $oAuth->user_id = $user->id;
  $oAuth->data  = Arr::only($accessTokens, ['openid', 'refresh_token']);
  $oAuth->save();
  return $oAuth;
}

public function signIn($user, $code)
{
  $utils = new WechatAppUtils;
  //获取微信token
  $accessTokens = $utils->accessToken($code);
  throw_if(!Arr::has($accessTokens, ['unionid', 'openid']), Exception::class, '授权失败,请稍后再试!');
  $oauth = $this->getUserOauth($user, 'wechat');
  throw_if(is_null($oauth), UserException::class, '授权失败,该账户未绑定!');
  return $oauth;
}
public function getUserOauth(User $user, $oAuthType)
{
  return OAuth::where(['oauth_type' => $oAuthType, 'user_id' => $user->id])->first();
}