From 53c0f3053b3c0df5707962a15b461406f353898d Mon Sep 17 00:00:00 2001
From: Florian Dagner <df@rs-nuernberg3.de>
Date: Mon, 11 Mar 2024 09:42:38 +0100
Subject: [PATCH] Missing declaring of variables added. Check that  is not null
 when the urlencode() function is called.

---
 block_qr.php | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/block_qr.php b/block_qr.php
index 33b7294..2c25ba6 100644
--- a/block_qr.php
+++ b/block_qr.php
@@ -99,6 +99,9 @@ public function get_content() {
         $calendarend = null;
         $fullview = false;
         $svgsize = null;
+        $wifiauthentication = null;
+        $wifissid = null;
+        $wifipasskey = null;
 
         switch ($this->config->options) {
             case 'currenturl':
@@ -257,8 +260,12 @@ public function get_content() {
         if (empty($configshortlink)) {
             $urlshort = null;
         } else {
-            $encodedqrcodelink = urlencode($qrcodelink);
-            $urlshort = str_replace('SHORTLINK', $encodedqrcodelink, $configshortlink);
+            if ($qrcodelink !== null) {
+                $encodedqrcodelink = urlencode($qrcodelink);
+                $urlshort = str_replace('SHORTLINK', $encodedqrcodelink, $configshortlink);
+            } else {
+                $urlshort = null;
+            }
         }
 
         // Size of QR code.