From 0f9e1286dd05ba02bbf63bb57832980491f16027 Mon Sep 17 00:00:00 2001
From: Misha Golenkov <mikhailgolenkov@catalyst-au.net>
Date: Fri, 30 Aug 2024 17:44:34 +1000
Subject: [PATCH] FIX-305: Fix global USER change during text filtering.

---
 README.md               | 1 +
 classes/text_filter.php | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 58a7ce7..f1dc37a 100644
--- a/README.md
+++ b/README.md
@@ -1535,6 +1535,7 @@ Michael Milette - Author and Lead Developer
 
 Big thank you to the following contributors. (Please let me know if I forgot to include you in the list):
 
+* golenkovm (Micha Golenkov): FIx global USER change during text filtering (2024).
 * 28Smiles (Leon Camus): Bug fix for {qrcode} and {urlencode} tags (2024).
 * 28Smiles (Leon Camus): New {ifingouping} tag (2024).
 * 28Smiles (Leon Camus): New {ifnotingrouping} tag (2024).
diff --git a/classes/text_filter.php b/classes/text_filter.php
index 095ee3b..9a167e3 100644
--- a/classes/text_filter.php
+++ b/classes/text_filter.php
@@ -2379,7 +2379,7 @@ function ($matches) use ($now) {
 
         // Substitutions.
 
-        $u = $USER;
+        $u = clone $USER;
         if (!isloggedin() || isguestuser()) {
             $u->firstname = get_string('defaultfirstname', 'filter_filtercodes');
             $u->lastname = get_string('defaultsurname', 'filter_filtercodes');