X-Git-Url: http://source.bookstackapp.com/bookstack/blobdiff_plain/fc761784a1a8f82f797cf28c01e3a282e2fb8f69..refs/pull/1554/head:/app/Http/Controllers/Auth/RegisterController.php

diff --git a/app/Http/Controllers/Auth/RegisterController.php b/app/Http/Controllers/Auth/RegisterController.php
index 79d696652..d57105b62 100644
--- a/app/Http/Controllers/Auth/RegisterController.php
+++ b/app/Http/Controllers/Auth/RegisterController.php
@@ -142,7 +142,7 @@ class RegisterController extends Controller
 
         if ($registrationRestrict) {
             $restrictedEmailDomains = explode(',', str_replace(' ', '', $registrationRestrict));
-            $userEmailDomain = $domain = substr(strrchr($userData['email'], "@"), 1);
+            $userEmailDomain = $domain = mb_substr(mb_strrchr($userData['email'], "@"), 1);
             if (!in_array($userEmailDomain, $restrictedEmailDomains)) {
                 throw new UserRegistrationException(trans('auth.registration_email_domain_invalid'), '/register');
             }