CodeStyle

1 files changed, 14 insertions, 4 deletions

diff --git a/app/Http/RequestHandlers/RegisterPage.php b/app/Http/RequestHandlers/RegisterPage.php
index 863af2c497..c77e2796d9 100644
--- a/app/Http/RequestHandlers/RegisterPage.php
+++ b/app/Http/RequestHandlers/RegisterPage.php
@@ -29,6 +29,8 @@ use Psr\Http\Message\ResponseInterface;
 use Psr\Http\Message\ServerRequestInterface;
 use Psr\Http\Server\RequestHandlerInterface;
 
+use function is_string;
+
 /**
  * Show a registration page.
  */
@@ -58,10 +60,18 @@ class RegisterPage implements RequestHandlerInterface
         $this->checkRegistrationAllowed();
 
         $tree     = $request->getAttribute('tree');
-        $comments = Session::get('register_comments', '');
-        $email    = Session::get('register_email', '');
-        $realname = Session::get('register_realname', '');
-        $username = Session::get('register_username', '');
+
+        $comments = Session::get('register_comments');
+        $comments = is_string($comments) ? $comments : '';
+
+        $email    = Session::get('register_email');
+        $email    = is_string($email) ? $email : '';
+
+        $realname = Session::get('register_realname');
+        $realname = is_string($realname) ? $realname : '';
+
+        $username = Session::get('register_username');
+        $username = is_string($username) ? $username : '';
 
         $show_caution = Site::getPreference('SHOW_REGISTER_CAUTION') === '1';