我用的是spatie/laravel-analytics，当我在route.php上使用它的时候一切都很好，但是当我试图在控制器中使用它的时候，它抛出了这个错误！有点奇怪！这是我的控制器代码：

<?php

namespace App\Http\Controllers;

use Spatie\Analytics\Period;
use Illuminate\Http\Request;
use App\Question;
use App\Contact;
use Carbon\Carbon;

class DashboardController extends Controller
{
    public function index()
    {

        // $questions = Question::whereNull('answer')->get();
        // $messages = Contact::where('status', false)->get();

        //Data from Google Analytics
        $totalVisitors = Analytics::fetchTotalVisitorsAndPageViews(Period::days(7));
        // $mostVisitedPages = Analytics::fetchMostVisitedPages(Period::days(7), $maxResults = 5);
        // $topReferrers = Analytics::fetchTopReferrers(Period::days(7), $maxResults = 5);
        // $topBrowsers = Analytics::fetchTopBrowsers(Period::days(7), $maxResults = 5);

        return $totalVisitors;

        return view('admin.admin-dashboard', compact(
            'messages', 'questions', 'totalVisitors', 'mostVisitedPages', 'topReferrers', 'topBrowsers'
        ));
    }
}

另外我的route.php代码是：

use Spatie\Analytics\Period;

Route::get('/test', function() {

    // Data from Google Analytics
    $totalVisitors = Analytics::fetchTotalVisitorsAndPageViews(Period::days(7));
    $mostVisitedPages = Analytics::fetchMostVisitedPages(Period::days(7), $maxResults = 5);
    $topReferrers = Analytics::fetchTopReferrers(Period::days(7), $maxResults = 5);
    $topBrowsers = Analytics::fetchTopBrowsers(Period::days(7), $maxResults = 5);

    return $totalVisitors;

});

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