From dd94fb1f8c232bd5ef869997f18fd31bc7629898 Mon Sep 17 00:00:00 2001
From: Michael Milette <michael.milette@tngconsulting.ca>
Date: Sun, 18 Feb 2024 20:34:55 -0500
Subject: [PATCH] MDL-72856 lib: Only inject one robots/noindex in head of
 Additional HTML

---
 lib/outputrenderers.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/outputrenderers.php b/lib/outputrenderers.php
index 8bcd9b44e7a..add05e0a04a 100644
--- a/lib/outputrenderers.php
+++ b/lib/outputrenderers.php
@@ -776,7 +776,9 @@ class core_renderer extends renderer_base {
             if (!isset($CFG->additionalhtmlhead)) {
                 $CFG->additionalhtmlhead = '';
             }
-            $CFG->additionalhtmlhead .= '<meta name="robots" content="noindex" />';
+            if (stripos($CFG->additionalhtmlhead, '<meta name="robots" content="noindex" />') === false) {
+                $CFG->additionalhtmlhead .= '<meta name="robots" content="noindex" />';
+            }
         }
 
         if (!empty($CFG->additionalhtmlhead)) {