From dc3998906d5498949066469166003fa4a2c7a987 Mon Sep 17 00:00:00 2001
From: jschlier <9108576+jschlier@users.noreply.github.com>
Date: Fri, 21 Jul 2023 08:01:13 +0000
Subject: [PATCH] [BUGFIX] Catch undefined array key

---
 Classes/Hooks/TypoLinkHandler.php | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Classes/Hooks/TypoLinkHandler.php b/Classes/Hooks/TypoLinkHandler.php
index 69c3ea1..6385814 100644
--- a/Classes/Hooks/TypoLinkHandler.php
+++ b/Classes/Hooks/TypoLinkHandler.php
@@ -40,9 +40,12 @@ class TypoLinkHandler
 {
     public function postProcessTypoLink(&$parameters, ContentObjectRenderer &$parentObject)
     {
-        if ($parameters['tagAttributes']['target'] === '_blank' && !$parameters['tagAttributes']['rel']) {
+        if (($parameters['tagAttributes']['target'] ?? '') === '_blank' && !($parameters['tagAttributes']['rel'] ?? '')) {
             $parameters['tagAttributes']['rel'] = 'noopener';
             $parameters['finalTagParts']['aTagParams'] .= ' rel="noopener"';
+            if (!isset($parameters['conf']['ATagParams'])) {
+                $parameters['conf']['ATagParams'] = '';
+            }
             $parameters['conf']['ATagParams'] .= ' rel="noopener"';
             $parameters['finalTag'] = str_replace('target="_blank"', 'target="_blank" rel="noopener"', $parameters['finalTag']);
         }