title: Facebook : You are not logged in: You are not logged in. Please log in and try again
body: <p>code throws error</p>
  
  <pre><code>        $helper = $fb-&gt;getRedirectLoginHelper();
          $loginUrl = $helper-&gt;getLoginUrl("https://apps.facebook.com/{$appname}/", $permissions);
          echo "&lt;script&gt;window.top.location.href='".$loginUrl."'&lt;/script&gt;";
  </code></pre>
  
  <p>Error </p>
  
  <blockquote>
    <p>You are not logged in: You are not logged in. Please log in and try again.</p>
  </blockquote>
  
  <p>the url which throws the error is (replaced my appname with appname) :</p>
  
  <blockquote>
    <p><a href="https://www.facebook.com/v2.7/dialog/oauth?client_id=8651003434372244&amp;state=f2ad3183f9f04355435434534776ae19688ac&amp;response_type=code&amp;sdk=php-sdk-5.3.1&amp;redirect_uri=https%3A%2F%2Fapps.facebook.com%2Fappname%2F&amp;scope=email" rel="noreferrer">https://www.facebook.com/v2.7/dialog/oauth?client_id=8651003434372244&amp;state=f2ad3183f9f04355435434534776ae19688ac&amp;response_type=code&amp;sdk=php-sdk-5.3.1&amp;redirect_uri=https%3A%2F%2Fapps.facebook.com%2Fappname%2F&amp;scope=email</a></p>
  </blockquote>
  
  <p>full script</p>
  
  <pre><code>     &lt;?php
      require_once  '../../Facebook/autoload.php';
      $fb = new Facebook\Facebook([
        'app_id' =&gt; "$appid",
        'app_secret' =&gt; "$appsecret",
        'default_graph_version' =&gt; 'v2.7',
      ]);
      $helper = $fb-&gt;getCanvasHelper();
      $permissions = ['email']; // optionnal
      try {
  
              $accessToken = $helper-&gt;getAccessToken();
  
      } catch(Facebook\Exceptions\FacebookResponseException $e) {
          // When Graph returns an error
          echo 'Graph returned an error: ' . $e-&gt;getMessage();
          exit;
      } catch(Facebook\Exceptions\FacebookSDKException $e) {
          // When validation fails or other local issues
          echo 'Facebook SDK returned an error: ' . $e-&gt;getMessage();
          exit;
       }
      if (isset($accessToken)) {
  
              $accessToken = (string) $accessToken;
              $fb-&gt;setDefaultAccessToken($accessToken);
  
          if (isset($_GET['code'])) {
              header('Location: ./');
          }
  
          // validating the access token
          try {
              $request = $fb-&gt;get('/me');
          } catch(Facebook\Exceptions\FacebookResponseException $e) {
              // When Graph returns an error
              if ($e-&gt;getCode() == 190) {
                  $helper = $fb-&gt;getRedirectLoginHelper();
                  $loginUrl = $helper-&gt;getLoginUrl("https://apps.facebook.com/{$appname}/", $permissions);
                  echo "&lt;script&gt;window.top.location.href='".$loginUrl."'&lt;/script&gt;";
                  exit;
              }
          } catch(Facebook\Exceptions\FacebookSDKException $e) {
              // When validation fails or other local issues
              echo 'Facebook SDK returned an error: ' . $e-&gt;getMessage();
              exit;
          }
          // getting basic info about user
          try {
              $profile_request = $fb-&gt;get('/me?fields=name,first_name,last_name,email');
              $user_profile = $profile_request-&gt;getGraphNode()-&gt;asArray();
          } catch(Facebook\Exceptions\FacebookResponseException $e) {
              // When Graph returns an error
              echo 'Graph returned an error: ' . $e-&gt;getMessage();
              $url = "https://apps.facebook.com/{$appname}/";
              echo '&lt;script&gt;window.top.location.href='.$url.'&lt;/script&gt;';
              exit;
          } catch(Facebook\Exceptions\FacebookSDKException $e) {
              // When validation fails or other local issues
              echo 'Facebook SDK returned an error: ' . $e-&gt;getMessage();
              exit;
          }
          // priting basic info about user on the screen
          //print_r($user_profile);
          // Now you can redirect to another page and use the access token from $_SESSION['facebook_access_token']
      } else {
  
          $helper = $fb-&gt;getRedirectLoginHelper();
          $loginUrl = $helper-&gt;getLoginUrl("https://apps.facebook.com/{$appname}/", $permissions);
          echo "&lt;script&gt;window.top.location.href='".$loginUrl."'&lt;/script&gt;";
      }
  </code></pre>