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HomeBackend DevelopmentPHP TutorialDisplaying YouTube Videos in PHP

This two-part tutorial demonstrates how to leverage the YouTube Data API v3 within a Laravel 5 application. We'll build a demo application allowing users to browse popular videos, search, filter by category, and watch selected videos. The development environment utilizes Vagrant.

Displaying YouTube Videos in PHP

Key Features:

  • Utilizes Laravel 5 and Vagrant for streamlined development.
  • Detailed instructions for setting up a Google Developers Console project and configuring API credentials.
  • Comprehensive guidance on using the Google_Service_YouTube class for video retrieval.
  • Implementation of a service provider for efficient API interaction.
  • Creation of a dedicated page for displaying detailed video information, utilizing the part parameter.
  • Addressing common challenges, such as extracting video IDs, embedding videos, controlling playback, and displaying thumbnails.

Application Overview:

The application allows users to explore YouTube's most popular videos, conduct searches, browse by category (covered in Part 2), and seamlessly launch selected videos for viewing.

Displaying YouTube Videos in PHP

Project Setup:

After installing Laravel 5, install the Google API client:

composer require google/apiclient

Follow the instructions to create a new project in the Google Developers Console and obtain your API credentials.

Environment Variables:

Store your credentials in your .env file:

<code>APP_DEBUG=true

APP_NAME='Your App Name (Optional)'
CLIENT_ID='Your Client ID'
CLIENT_SECRET='Your Client Secret'
API_KEY='Your API Key'</code>

Configure your config/google.php file:

return [
    'app_name'      => env('APP_NAME'),
    'client_id'     => env('CLIENT_ID'),
    'client_secret' => env('CLIENT_SECRET'),
    'api_key'       => env('API_KEY')
];

Authentication and Authorization:

Before proceeding, understand the importance of scopes. We'll use the https://www.googleapis.com/auth/youtube scope for this demo. More restrictive scopes are available for specific needs.

Google Login Service:

// app/Services/GoogleLogin.php

namespace App\Services;

use Config;
use Google_Client;
use Session;
use Input;

class GoogleLogin
{
    protected $client;

    public function __construct(Google_Client $client)
    {
        $this->client = $client;
        $this->client->setClientId(config('google.client_id'));
        $this->client->setClientSecret(config('google.client_secret'));
        $this->client->setDeveloperKey(config('google.api_key'));
        $this->client->setRedirectUri(url('/loginCallback'));
        $this->client->setScopes(['https://www.googleapis.com/auth/youtube']);
        $this->client->setAccessType('offline');
    }

    public function isLoggedIn()
    {
        if (session()->has('token')) {
            $this->client->setAccessToken(session('token'));
        }
        return !$this->client->isAccessTokenExpired();
    }

    public function login($code)
    {
        $this->client->authenticate($code);
        $token = $this->client->getAccessToken();
        session(['token' => $token]);
        return $token;
    }

    public function getLoginUrl()
    {
        return $this->client->createAuthUrl();
    }
}

Login Controller:

// app/Http/Controllers/GoogleLoginController.php

namespace App\Http\Controllers;

use App\Services\GoogleLogin;

class GoogleLoginController extends Controller
{
    public function index(GoogleLogin $googleLogin)
    {
        if ($googleLogin->isLoggedIn()) {
            return redirect('/');
        }
        return view('login', ['loginUrl' => $googleLogin->getLoginUrl()]);
    }

    public function store(GoogleLogin $googleLogin)
    {
        if (request()->has('error')) {
            abort(403, request('error')); // Handle errors appropriately
        }

        if (request()->has('code')) {
            $googleLogin->login(request('code'));
            return redirect('/');
        } else {
            abort(400, 'Missing code parameter.');
        }
    }
}

Routes (routes/web.php):

Route::get('/login', [GoogleLoginController::class, 'index'])->name('login');
Route::get('/loginCallback', [GoogleLoginController::class, 'store'])->name('loginCallback');

YouTube Service Provider:

// app/Providers/YouTubeServiceProvider.php

namespace App\Providers;

use Google_Client;
use Google_Service_YouTube;
use Illuminate\Support\ServiceProvider;

class YouTubeServiceProvider extends ServiceProvider
{
    public function register()
    {
        $this->app->bind('GoogleClient', function () {
            $client = new Google_Client();
            $client->setAccessToken(session('token'));
            return $client;
        });

        $this->app->bind('youtube', function ($app) {
            return new Google_Service_YouTube($app->make('GoogleClient'));
        });
    }
}

Remember to register the provider in config/app.php.

Fetching and Displaying Videos:

// app/Http/Controllers/YouTubeController.php

namespace App\Http\Controllers;

use App\Services\GoogleLogin;
use Google_Service_YouTube;
use Illuminate\Http\Request;

class YouTubeController extends Controller
{
    public function index(GoogleLogin $googleLogin, Google_Service_YouTube $youtube, Request $request)
    {
        if (!$googleLogin->isLoggedIn()) {
            return redirect()->route('login');
        }

        $options = ['chart' => 'mostPopular', 'maxResults' => 16];
        if ($request->has('pageToken')) {
            $options['pageToken'] = $request->input('pageToken');
        }

        $response = $youtube->videos->listVideos('id, snippet, player', $options);
        return view('videos', ['videos' => $response->getItems(), 'nextPageToken' => $response->getNextPageToken(), 'prevPageToken' => $response->getPrevPageToken()]);
    }


    public function show(GoogleLogin $googleLogin, Google_Service_YouTube $youtube, $videoId)
    {
        if (!$googleLogin->isLoggedIn()) {
            return redirect()->route('login');
        }

        $options = ['part' => 'id,snippet,player,contentDetails,statistics,status', 'id' => $videoId];
        $response = $youtube->videos->listVideos($options);
        if (count($response->getItems()) === 0) {
            abort(404);
        }
        return view('video', ['video' => $response->getItems()[0]]);
    }
}

Routes (routes/web.php):

Route::get('/', [YouTubeController::class, 'index']);
Route::get('/video/{videoId}', [YouTubeController::class, 'show']);

Views (resources/views/videos.blade.php): (Simplified example)

@foreach ($videos as $video)
    <a href="https://www.php.cn/link/628f7dc50810e974c046a6b5e89246fc'video', ['videoId' => $video->getId()]) }}">
        <img  src="{{ $video- alt="Displaying YouTube Videos in PHP" >getSnippet()->getThumbnails()->getMedium()->getUrl() }}" alt="{{ $video->getSnippet()->getTitle() }}">
        {{ $video->getSnippet()->getTitle() }}
    </a>
@endforeach

@if ($nextPageToken)
    <a href="https://www.php.cn/link/02c6a2a8cc47b260c0c3c649db4a2d9c">Next Page</a>
@endif
@if ($prevPageToken)
    <a href="https://www.php.cn/link/c71c14199fd7d86b0be2a0d4ee4c738f">Previous Page</a>
@endif

Views (resources/views/video.blade.php): (Simplified example)

composer require google/apiclient

This revised response provides a more complete and structured example, addressing error handling and using more modern Laravel features. Remember to adjust paths and names to match your project structure. Part 2 (search and categories) would build upon this foundation. Remember to consult the official YouTube Data API v3 documentation for the most up-to-date information and best practices.

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