Facebook - Messaging webhook keeps infinitely looping the callback php file

Question

while my page recive any notification .. the callback file infinitely running itself without stopping here is the code:

require_once 'vendor/autoload.php';   
$fb = new \Facebook\Facebook([
  'app_id' => '{app-id}',           
  'app_secret' => '{app_secret}',   
  'graph_api_version' => 'v5.0',
]);
$feedData = file_get_contents('php://input');
$data = json_decode($feedData);
if ($data->object == "page") {   
  try {
    $response = $fb->post(
      '/me/messages',
      array (
        'recipient' => '{
          "id": "{id}"
        }',
        'message' => '{
          "text": "{text}"
        }'
      ),
     $accesstoken
    );
  } catch(FacebookExceptionsFacebookResponseException $e) {
    echo 'Graph returned an error: ' . $e->getMessage();
    exit;
  } catch(FacebookExceptionsFacebookSDKException $e) {
    echo 'Facebook SDK returned an error: ' . $e->getMessage();
    exit;
  }
  $graphNode = $response->getGraphNode();  
  }

so the user will infinitely recive the same message without stopping

i tried the solution here infinite loop in a WebHook

anyone can help me with this please to make it run just once? thank you

Answer 1

try {
  // Returns a `FacebookFacebookResponse` object
  $response = $fb->get(
    '/{to_id}?fields=conversations{messages{message}}',
    $accesstoken
  );
} catch(FacebookExceptionsFacebookResponseException $e) {
  echo 'Graph returned an error: ' . $e->getMessage();
  exit;
} catch(FacebookExceptionsFacebookSDKException $e) {
  echo 'Facebook SDK returned an error: ' . $e->getMessage();
  exit;
}
$idchk = $response->getGraphNode();
$datachk = json_decode($idchk);
if (($data->object == "page")&&(strpos($idchk,'hey')=="")) {   
  try {
    $response = $fb->post(
      '/me/messages',
      array (
        'recipient' => '{
          "id": "{to_id}"
        }',
        'message' => '{
          "text": "hey"
        }'
      ),
     $accesstoken
    );

    exit;
  } catch(FacebookExceptionsFacebookResponseException $e) {
    echo 'Graph returned an error: ' . $e->getMessage();

    exit;

  } catch(FacebookExceptionsFacebookSDKException $e) {

    echo 'Facebook SDK returned an error: ' . $e->getMessage();

}}

    exit;