From 0f8f164a0748168e67ee7e32c2cbe91a9a7c0a19 Mon Sep 17 00:00:00 2001
From: Andrew Nicols <andrew@nicols.co.uk>
Date: Wed, 7 Dec 2022 21:40:01 +0800
Subject: [PATCH] MDL-76559 core: validate_email does not take false either

---
 lib/weblib.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/weblib.php b/lib/weblib.php
index 932dfe867de..551c5a3e06d 100644
--- a/lib/weblib.php
+++ b/lib/weblib.php
@@ -1109,7 +1109,7 @@ function page_get_doc_link_path(moodle_page $page) {
 function validate_email($address) {
     global $CFG;
 
-    if ($address === null || $address === '') {
+    if ($address === null || $address === false || $address === '') {
         return false;
     }