From 897662146d49239d250d37ed1dd01d7c26c9fb47 Mon Sep 17 00:00:00 2001
From: Julien Boulen <julien.boulen@univ-rennes2.fr>
Date: Wed, 27 Aug 2025 11:23:47 +0200
Subject: [PATCH] Convert upper unicode characters to plain ascii before
 cleaning up file names

---
 locallib.php | 1 +
 1 file changed, 1 insertion(+)

diff --git a/locallib.php b/locallib.php
index 9c966f1..6dfed0f 100644
--- a/locallib.php
+++ b/locallib.php
@@ -225,6 +225,7 @@ function clean_custom($filename) {
 
     $cleanfilenameuserpref = get_user_preferences('clean_filerenaming', '');
     if ((isset($cleanfilenameuserpref) && $cleanfilenameuserpref)) {
+        $filename = core_text::specialtoascii($filename);
         $filename = preg_replace('/[^A-Za-z0-9\_\-\.]/', '', $filename);
     }
     return clean_filename($filename);