From c24cfa662f011ba13651205825eee675fd6c0e2e Mon Sep 17 00:00:00 2001
From: krokodok <jeff@required.ch>
Date: Tue, 3 Sep 2024 10:09:33 +0200
Subject: [PATCH 1/2] Fix void elements that libxml2 does not know

---
 inc/namespace.php | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/inc/namespace.php b/inc/namespace.php
index 2c95fb2..e08c941 100644
--- a/inc/namespace.php
+++ b/inc/namespace.php
@@ -161,6 +161,15 @@ function enable_lightbox_for_images( string $content ): string {
 		$content = $document_html;
 	}
 
+	// Remove stray end tags of void elements libxml2 does not know.
+	$stray_end_tags = [
+		'</embed>',
+		'</source>',
+		'</track>',
+		'</wbr>',
+	];
+	$content        = str_replace( $stray_end_tags, '', $content );
+
 	// phpcs:enable WordPress.NamingConventions.ValidVariableName.UsedPropertyNotSnakeCase
 
 	if ( $lightboxes > 0 && ! wp_script_is( 'required-tobii-integration' ) ) {

From 045fb0c7659dc111be33b583db4b64ef56c5a138 Mon Sep 17 00:00:00 2001
From: krokodok <jeff@required.ch>
Date: Mon, 30 Sep 2024 15:44:35 +0200
Subject: [PATCH 2/2] Combine two `str_replace()` into one

---
 inc/namespace.php | 15 +++++----------
 1 file changed, 5 insertions(+), 10 deletions(-)

diff --git a/inc/namespace.php b/inc/namespace.php
index e08c941..b89a522 100644
--- a/inc/namespace.php
+++ b/inc/namespace.php
@@ -145,13 +145,17 @@ function enable_lightbox_for_images( string $content ): string {
 		$link->setAttribute( 'data-group', $image_id );
 	}
 
-	// Strip the XML tag and placeholders as it's only used for the internal encoding.
+	// Strip XML tag, internal encoding placeholders and stray end tags of void elements unknown to libxml2.
 	$document_html = trim(
 		str_replace(
 			[
 				'<?xml encoding="utf-8"?>',
 				'<preserveselfclosingtags>',
 				'</preserveselfclosingtags>',
+				'</embed>',
+				'</source>',
+				'</track>',
+				'</wbr>',
 			],
 			'',
 			(string) $document->saveHTML()
@@ -161,15 +165,6 @@ function enable_lightbox_for_images( string $content ): string {
 		$content = $document_html;
 	}
 
-	// Remove stray end tags of void elements libxml2 does not know.
-	$stray_end_tags = [
-		'</embed>',
-		'</source>',
-		'</track>',
-		'</wbr>',
-	];
-	$content        = str_replace( $stray_end_tags, '', $content );
-
 	// phpcs:enable WordPress.NamingConventions.ValidVariableName.UsedPropertyNotSnakeCase
 
 	if ( $lightboxes > 0 && ! wp_script_is( 'required-tobii-integration' ) ) {