'get_extended' breaks when using 'more' gutenberg block

[joewebber]

'get_extended' returns the closing tag <!-- /wp:more -->' in the extended content, which prevents 'the_content' filter from working correctly.

Steps to replicate:

<?php
// Fetch post content
$content = get_post_field('post_content', get_the_ID());

// Get content parts
$content_parts = get_extended($content);

echo apply_filters('the_content', $content_parts['extended']);

Quick workaround (wp-includes/post.php line: 592):

<?php
$post = str_replace('<!-- /wp:more -->', '<!-- /more -->', $post);

[pento]

Related: #46471.

[SirLouen]

Reproduction Report

Description

❌ This report can't validate that the issue can be reproduced.

Environment

• WordPress: 6.9-beta2-61080
• PHP: 8.2.29
• Server: nginx/1.29.3
• Database: mysqli (Server: 8.4.7 / Client: mysqlnd 8.2.29)
• Browser: Chrome 141.0.0.0
• OS: Windows 10/11
• Theme: Twenty Twenty 2.9
• MU Plugins:
  • WooCommerce Analytics - Proxy Speed Module 1.0.0
• Plugins:
  • Classic Editor 1.6.7
  • Test Reports 1.2.0

Testing Instructins

1. Added the code to singular.php template.
2. Switched to Classic Editor
3. Created a new post with content
4. Added a <!--more--> in the middle of the content
5. 👌 Extended section is rendering in the page template as expected

1. Switched back to Gutenberg
2. Converted text into blocks, including the more tags.
3. 👌 Again, extended section is rendering in the page template as expected

Actual Results

1. ❌ Error condition is not occurring.

Additional Notes

• It seems that this issue is not reproducible anymore. I'm not sure how this was being generated in gutenberg back in the day, but the current, processes a regular more tag within two wp:more` tags like

<!-- wp:more -->
<!--more-->
<!-- /wp:more -->

I'm not sure if this has influenced in the current valid result, but probably. Closing this as worksforme