From 0a4911566cfe934a77c0ccb757e59448879bb06a Mon Sep 17 00:00:00 2001
From: onli <onli@paskuda.biz>
Date: Mon, 15 Mar 2021 23:24:03 +0100
Subject: [PATCH] php8 compat: Prevent unused key error

---
 include/functions_config.inc.php | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/include/functions_config.inc.php b/include/functions_config.inc.php
index e9d1dcf3..e53e733d 100644
--- a/include/functions_config.inc.php
+++ b/include/functions_config.inc.php
@@ -1941,6 +1941,10 @@ function serendipity_ACL_SQL(&$cond, $append_category = false, $type = 'category
                 break;
         }
 
+        if (! array_key_exists('joins', $cond) ) {
+            $cond['joins'] = '';
+        }
+
         $cond['joins'] .= " LEFT JOIN {$serendipity['dbPrefix']}authorgroups AS acl_a
                                    ON acl_a.authorid = " . $read_id . "
                             LEFT JOIN {$serendipity['dbPrefix']}access AS acl_acc
@@ -1950,7 +1954,7 @@ function serendipity_ACL_SQL(&$cond, $append_category = false, $type = 'category
                                       )";
 
         if (empty($cond['and'])) {
-            $cond['and'] .= ' WHERE ';
+            $cond['and'] = ' WHERE ';
         } else {
             $cond['and'] .= ' AND ';
         }