How can i get the group id from facebook API - php

Question

How can i get the group id from facebook API
<?php
session_start();
require_once __DIR__ . '/src/Facebook/autoload.php';
$fb = new Facebook\Facebook([
'app_id' => 'APP_ID',
'app_secret' => 'APP_SECRET',
'default_graph_version' => 'v2.4',
]);
$helper = $fb->getCanvasHelper();
$permissions = ['email']; // optionnal
try {
if (isset($_SESSION['facebook_access_token'])) {
$accessToken = $_SESSION['facebook_access_token'];
} else {
$accessToken = $helper->getAccessToken();
}
} catch(Facebook\Exceptions\FacebookResponseException $e) {
// When Graph returns an error
echo 'Graph returned an error: ' . $e->getMessage();
exit;
} catch(Facebook\Exceptions\FacebookSDKException $e) {
// When validation fails or other local issues
echo 'Facebook SDK returned an error: ' . $e->getMessage();
exit;
}
if (isset($accessToken)) {
if (isset($_SESSION['facebook_access_token'])) {
$fb->setDefaultAccessToken($_SESSION['facebook_access_token']);
} else {
$_SESSION['facebook_access_token'] = (string) $accessToken;
// OAuth 2.0 client handler
$oAuth2Client = $fb->getOAuth2Client();
// Exchanges a short-lived access token for a long-lived one
$longLivedAccessToken = $oAuth2Client->getLongLivedAccessToken($_SESSION['facebook_access_token']);
$_SESSION['facebook_access_token'] = (string) $longLivedAccessToken;
$fb->setDefaultAccessToken($_SESSION['facebook_access_token']);
}
// validating the access token
try {
$request = $fb->get('/me');
} catch(Facebook\Exceptions\FacebookResponseException $e) {
// When Graph returns an error
if ($e->getCode() == 190) {
unset($_SESSION['facebook_access_token']);
$helper = $fb->getRedirectLoginHelper();
$loginUrl = $helper->getLoginUrl('https://apps.facebook.com/APP_NAMESPACE/', $permissions);
echo "<script>window.top.location.href='".$loginUrl."'</script>";
exit;
}
} catch(Facebook\Exceptions\FacebookSDKException $e) {
// When validation fails or other local issues
echo 'Facebook SDK returned an error: ' . $e->getMessage();
exit;
}
// getting basic info about user
try {
$profile_request = $fb->get('/me?fields=name,first_name,last_name,email');
$profile = $profile_request->getGraphNode()->asArray();
} catch(Facebook\Exceptions\FacebookResponseException $e) {
// When Graph returns an error
echo 'Graph returned an error: ' . $e->getMessage();
unset($_SESSION['facebook_access_token']);
echo "<script>window.top.location.href='https://apps.facebook.com/APP_NAMESPACE/'</script>";
exit;
} catch(Facebook\Exceptions\FacebookSDKException $e) {
// When validation fails or other local issues
echo 'Facebook SDK returned an error: ' . $e->getMessage();
exit;
}
// priting basic info about user on the screen
print_r($profile);
// Now you can redirect to another page and use the access token from $_SESSION['facebook_access_token']
} else {
$helper = $fb->getRedirectLoginHelper();
$loginUrl = $helper->getLoginUrl('https://apps.facebook.com/APP_NAMESPACE/', $permissions);
echo "<script>window.top.location.href='".$loginUrl."'</script>";
}
I had codes wherein i am getting
Array ( [name] => xxxx [first_name] => xxxx [last_name] => xxxx [email] => xxxx [id] => xxxxx)
Now I want group ids how can it possible please assist

Answer 1

How to get a list of all the groups you manage is explained very well in the docs, including example code: https://developers.facebook.com/docs/graph-api/reference/user/groups/
You need to authorize with the user_managed_groups permisssion and call the /me/groups endpoint. Do not use the User ID for that endpoint, just use /me - it points to the current User anyway:
$groups_request = $fb->get('/me/groups');
$groups = $groups_request->getGraphNode()->asArray();
Be aware that you can only get groups you manage, you can NOT get access to groups you are just a member of. The user_groups permission to get ALL groups has been removed: https://developers.facebook.com/docs/apps/changelog#v2_4 (search for "90-day deprecations")

Answer 2

To access the groups of a user, you need to use the User Groups endpoint
To read the Facebook groups of a user you need to do yet another API call with:
/{user-id}/groups
Since you've retrieved the ID in your "/me" call, you're almost there.
You can change your code slightly for this:
$profile_request = $fb->get('/me?fields=name,first_name,last_name,email');
$profile = $profile_request->getGraphNode()->asArray();
$groups_request = $fb->get("{$profile['id']}/groups");
$groups = $groups_request->getGraphNode()->asArray();