微信开放平台登录集成实验：从0到用户一键登录

<a href="https://open.weixin.qq.com/connect/oauth2/authorize?appid=APPID&redirect_uri=REDIRECT_URI&response_type=code&scope=snsapi_userinfo&state=STATE#wechat_redirect">
    微信登录
</a>

// 获取授权码
$code = $_GET['code'] ?? '';

// 通过code获取access_token
$url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid={$appid}&secret={$secret}&code={$code}&grant_type=authorization_code";
$response = json_decode(file_get_contents($url), true);

// 获取用户信息
$userInfoUrl = "https://api.weixin.qq.com/sns/userinfo?access_token={$response['access_token']}&openid={$response['openid']}";
$userInfo = json_decode(file_get_contents($userInfoUrl), true);

// 处理用户信息，如注册或登录
if (!empty($userInfo['openid'])) {
    // 根据openid查找用户或创建新用户
    $user = User::where('wx_openid', $userInfo['openid'])->first();
    if (!$user) {
        // 创建新用户
        $user = User::create([
            'wx_openid' => $userInfo['openid'],
            'name' => $userInfo['nickname'],
            'avatar' => $userInfo['headimgurl'],
            // 其他字段...
        ]);
    }
    // 登录用户
    Auth::login($user);
}