From 19a296dfa078d02fa57b7b1801cf34f6df9cd966 Mon Sep 17 00:00:00 2001
From: Jake Dallimore <jake@moodle.com>
Date: Thu, 14 Apr 2022 10:13:06 +0800
Subject: [PATCH] MDL-74493 admin: add check for mbstring extension to prevent
 errors

---
 admin/index.php | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/admin/index.php b/admin/index.php
index 3e91f680325..9732be58ddf 100644
--- a/admin/index.php
+++ b/admin/index.php
@@ -53,6 +53,12 @@ if (!extension_loaded('xml')) {
     die();
 }
 
+// Make sure mbstring extension is available.
+if (!extension_loaded('mbstring')) {
+    echo 'Moodle requires the mbstring PHP extension. Please install or enable the mbstring extension.';
+    die();
+}
+
 define('NO_OUTPUT_BUFFERING', true);
 
 if (isset($_POST['upgradekey'])) {
-- 
2.11.4.GIT