From 4bf4ecaf0eec6b4123af259bad5756df026d34af Mon Sep 17 00:00:00 2001
From: Jon Goldberg <jon@megaphonetech.com>
Date: Thu, 22 Dec 2022 11:55:24 -0500
Subject: [PATCH] fixes core#4047 - htmlspecialchars called on empty array

---
 HTML/Common.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/HTML/Common.php b/HTML/Common.php
index 487ca5e22..789d6d867 100644
--- a/HTML/Common.php
+++ b/HTML/Common.php
@@ -141,7 +141,7 @@ function _getAttrString($attributes)
         if (is_array($attributes)) {
             $charset = HTML_Common::charset();
             foreach ($attributes as $key => $value) {
-                $strAttr .= ' ' . $key . '="' . htmlspecialchars(($value ?? ''), ENT_COMPAT, $charset) . '"';
+                $strAttr .= ' ' . $key . '="' . htmlspecialchars((is_array($value) ? '' : $value ?? ''), ENT_COMPAT, $charset) . '"';
             }
         }
         return $strAttr;