From b461f157ca52b05d42e1c105871b6f7823618f9b Mon Sep 17 00:00:00 2001
From: Toby Zerner <toby.zerner@gmail.com>
Date: Fri, 26 Feb 2016 13:59:05 +1030
Subject: [PATCH] Use regex for username validation

Laravel's alpha_dash rule allows unicode letters including those with inflections, leading to issues like #832. As per discussion in #557, we are sticking with ASCII-only usernames for now.
---
 framework/core/src/Core/Validator/UserValidator.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/framework/core/src/Core/Validator/UserValidator.php b/framework/core/src/Core/Validator/UserValidator.php
index e37f78b87..3f4fad35f 100644
--- a/framework/core/src/Core/Validator/UserValidator.php
+++ b/framework/core/src/Core/Validator/UserValidator.php
@@ -45,7 +45,7 @@ class UserValidator extends AbstractValidator
         return [
             'username' => [
                 'required',
-                'alpha_dash',
+                'regex:/^[a-z0-9_-]+$/i',
                 'unique:users,username'.$idSuffix,
                 'min:3',
                 'max:30'