如何在laravel 5.2中将到期日期条件添加到登录功能

我认为这是不可能的，即使在Laravel 5.5中也是如此。以看看retrieveByCredentials在方法Illuminate\Auth\EloquentUserProvider被用来从该数据库的用户，你可以看到，查询通过简单的键/值组合的where方法的$query对象，这等同于where key = value。从5.5开始：

public function retrieveByCredentials(array $credentials)
{
    if (empty($credentials) ||
       (count($credentials) === 1 &&
        array_key_exists('password', $credentials))) {
        return;
    }

    // First we will add each credential element to the query as a where clause.
    // Then we can execute the query and, if we found a user, return it in a
    // Eloquent User "model" that will be utilized by the Guard instances.
    $query = $this->createModel()->newQuery();

    foreach ($credentials as $key => $value) {
        if (! Str::contains($key, 'password')) {
            $query->where($key, $value);
        }
    }

    return $query->first();
}

为了达到你所追求的，我会建议做此检查后，该用户已登录，您的控制器，例如：

// Imagine this is the controller method where you're dealing with user logins
public function login(array $credentials)
{
    if (! auth()->attempt($credentials)) {
        // Handle what happens if the users credentials are incorrect.
    }

    $user = auth()->user();

    if (Carbon::now()->gte($user->expires)) {
        // User's account has expired, lets log them out.
        auth()->logout();

        // Return a redirect with a message or something...
    }

    // Handle a successful login.
}

我不确定auth()5.2中是否提供该帮助程序，但是您应该可以使用AuthFacade来执行相同的操作，例如Auth::attempt(...)。