PHP code example of horde / service_facebook

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

horde / service_facebook example snippets

use Horde\Http\Client;
use Horde\Http\RequestFactory;
use Horde\Http\StreamFactory;
use Horde\OAuth\Client\AuthenticatedHttpClient;
use Horde\OAuth\Client\TokenSet;
use Horde\Service\Facebook\FacebookApiClient;

// Bearer-authenticated PSR-18 client.
$tokenSet = new TokenSet(
    accessToken: $userAccessToken,
    tokenType: 'Bearer',
    expiresAt: null,
    refreshToken: null,
    scope: null,
);
$httpClient = new AuthenticatedHttpClient(new Client(), $tokenSet);

$fb = FacebookApiClient::create(
    httpClient: $httpClient,
    requestFactory: new RequestFactory(),
    streamFactory: new StreamFactory(),
);

$me = $fb->getMe(['id', 'name', 'email']);
echo $me->name;   // "Ada Lovelace"
echo $me->email;  // "[email protected]" (if the token holds the email scope)

use Horde\Service\Facebook\Graph\GraphApiVersion;

$fbV24 = $fb->withVersion(GraphApiVersion::V24_0);
$events = iterator_to_array($fbV24->listMyUpcomingEvents());

use Horde\Service\Facebook\Graph\Pagination\Cursor;

foreach ($fb->listMyUpcomingEvents(new Cursor(limit: 25)) as $event) {
    echo $event->name, ' @ ', $event->startTime->format('Y-m-d H:i'), "\n";
}

foreach ($fb->listMyPermissions() as $perm) {
    if (!$perm->isGranted()) {
        echo $perm->name(), ' status: ', $perm->status(), "\n";
    }
}

$info = $fb->debugToken($someUserToken, $appId . '|' . $appSecret);
if (!$info->isValid()) {
    // Reject the request. The caller's token is no good.
}
if ($info->expiresAt !== null && $info->expiresAt <= new DateTimeImmutable('+5 minutes')) {
    // Nearly expired. Trigger a refresh.
}

use Horde\OAuth\Client\OAuth2Client;
use Horde\Service\Facebook\Graph\GraphApiVersion;
use Horde\Service\Facebook\OAuth\FacebookProviderConfig;

$providerConfig = FacebookProviderConfig::forVersion(GraphApiVersion::V25_0);
$oauth = new OAuth2Client(
    $httpClient,
    $requestFactory,
    $streamFactory,
    $providerConfig,
    clientId: getenv('FB_APP_ID'),
    clientSecret: getenv('FB_APP_SECRET'),
);

// 1. Redirect the user to Facebook.
$state = bin2hex(random_bytes(16));
$authUrl = $oauth->getAuthorizationUrl(
    redirectUri: 'https://example.org/callback',
    scopes: ['public_profile', 'email', 'user_events'],
    state: $state,
);
header('Location: ' . $authUrl);

// 2. In the callback handler, exchange the code for a TokenSet.
$tokenSet = $oauth->exchangeCode($_GET['code']);

// 3. Store $tokenSet->accessToken (and $tokenSet->refreshToken if present).
// 4. Wrap your PSR-18 client and hand it to FacebookApiClient::create().

use Horde\Service\Facebook\OAuth\FacebookOidcSupport;
use Horde\Service\Facebook\OAuth\FacebookProviderConfig;

$oidc = new FacebookOidcSupport($httpClient, $requestFactory);

$verified = $oidc->verifyIdToken($idToken, [
    'verify_iss' => FacebookProviderConfig::ISSUER,
    'verify_aud' => getenv('FB_APP_ID'),
]);

$userId = $verified->getSubject();
$claims = $verified->getClaims();

use Horde\Service\Facebook\Graph\GraphErrorException;

try {
    $events = iterator_to_array($fb->listMyUpcomingEvents());
} catch (GraphErrorException $e) {
    if ($e->error()->isTokenExpired()) {
        // Refresh the token, then retry.
    }
    if ($e->error()->isRateLimit()) {
        // Back off. Check e->error()->isAppRateLimit() vs isUserRateLimit()
        // for the specific limit.
    }
    if ($e->error()->isPermissionMissing()) {
        // Ask the user to grant the missing scope.
    }
    throw $e;
}

use Horde\Service\Facebook\Graph\Value\Event;

// Version-portable. Accepts any V{N}\Value\Event.
function renderEventSummary(Event $event): string
{
    return $event->name() . ' @ ' . $event->startTime()->format('Y-m-d H:i');
}

use Horde\Service\Facebook\Graph\GraphApiVersion;
use Horde\Service\Facebook\Graph\ProfileUrls;

// Link to a user's public profile page.
$link = ProfileUrls::profileLink('12345');
// => https://www.facebook.com/12345

$link = ProfileUrls::profileLink('zuck');
// => https://www.facebook.com/zuck

// Profile picture URL. Meta serves a 302 to the actual image.
$thumb = ProfileUrls::thumbnailUrl('12345');
// => https://graph.facebook.com/v25.0/12345/picture

// With size/type options.
$thumb = ProfileUrls::thumbnailUrl('12345', GraphApiVersion::V25_0, [
    'type' => 'large',
]);
$thumb = ProfileUrls::thumbnailUrl('12345', null, [
    'width' => 200,
    'height' => 200,
]);