From 4a8616214f799b01a3bc59a61582850c16dcc1f5 Mon Sep 17 00:00:00 2001
From: Hanno <hanno@gentoo.org>
Date: Sun, 13 Oct 2019 18:21:18 +0200
Subject: [PATCH] Avoid undefined index notices.

See #642.

Backported from master branch.

Signed-off-by: Thomas Hochstein <thh@inter.net>
---
 include/compat.inc.php | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/compat.inc.php b/include/compat.inc.php
index e367d629..ae6b9292 100644
--- a/include/compat.inc.php
+++ b/include/compat.inc.php
@@ -373,19 +373,19 @@ if (ini_get('magic_quotes_gpc')) {
 }
 
 // Merge get and post into the serendipity array
-if (is_array($_GET['serendipity'])) {
+if (array_key_exists('serendipity', $_GET) && is_array($_GET['serendipity'])) {
     $serendipity['GET']    = &$_GET['serendipity'];
 } else {
     $serendipity['GET']    = array();
 }
 
-if (is_array($_POST['serendipity'])) {
+if (array_key_exists('serendipity', $_POST) && is_array($_POST['serendipity'])) {
     $serendipity['POST']   = &$_POST['serendipity'];
 } else {
     $serendipity['POST']   = array();
 }
 
-if (is_array($_COOKIE['serendipity'])) {
+if (array_key_exists('serendipity', $_COOKIE) && is_array($_COOKIE['serendipity'])) {
     $serendipity['COOKIE'] = &$_COOKIE['serendipity'];
 } else {
     $serendipity['COOKIE'] = array();