From 5048f42a19beee5aac6efa7caa383536f6c990b8 Mon Sep 17 00:00:00 2001
From: Lee Maguire <lee@dxw.com>
Date: Fri, 19 Dec 2025 16:36:03 +0000
Subject: [PATCH] Check array exists before using it

```
PHP Warning:  Undefined array key 2 in /var/www/html/wp-content/plugins/long-read-plugin/src/InPageNavigation.php on line 16
```
---
 src/InPageNavigation.php | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/InPageNavigation.php b/src/InPageNavigation.php
index d2ba1bb..92fe879 100644
--- a/src/InPageNavigation.php
+++ b/src/InPageNavigation.php
@@ -11,9 +11,10 @@ private function parseHeading(string $html): object
 	{
 		$matches = [];
 		preg_match('/(id=")(.*?)"/', $html, $matches);
+		$tmp_id = (isset($matches[2])) ? $matches[2] : '';
 		return (object) [
 			'title' => trim(strip_tags($html)),
-			'id' => $matches[2]
+			'id' => $tmp_id
 		];
 	}