Many coding standard errors

+function drupalchat_app_settings()
+{
+    global $user;
+
+    if (isset($_SESSION['token']) && !empty($_SESSION['token'])) {
+        $token = $_SESSION['token'];
+    } else {
+        $json = _drupalchat_get_auth(array());
+        $token = $json['key'];
+    }
+
+    $drupalchat_host = DRUPALCHAT_EXTERNAL_A_HOST;
+    $host = explode("/", $drupalchat_host);
+    $host_name = $host[2];
+
+    $dashboardUrl = "https://". DRUPALCHAT_EXTERNAL_CDN_HOST ."/apps/dashboard/#/settings/app?sessid=". $token ."&hostName=". $host_name ."&hostPort=". DRUPALCHAT_EXTERNAL_A_PORT;
+    $form = array();
+    $form['drupalchat_app_dashboard'] = array(
+      '#type' => 'button',
+      '#attributes' => array('onClick' => 'window.open("'.$dashboardUrl.'","_blank")'),
+      '#value' => t('Click here to open App Dashboard'),
+    );
+
+    return $form;
+}

Code must be formatted following the Drupal coding standards, for which the indentation is two spaces and the opening curly parenthesis must be in the same line containing the function declaration, among other things.