single_post_title() doesn't respect private and protected posts

[henry.wright]

single_post_title() doesn't respect private and protected content. It will either display or return the content regardless.

In contrast, get_the_title() does respect private and protected content.

Note single_post_title() is used when building the document title in wp_get_document_title().

[SirLouen]

Reproduction Report

Description

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

Environment

• WordPress: 6.9-alpha-60093-src
• PHP: 8.2.29
• Server: nginx/1.29.1
• Database: mysqli (Server: 8.4.6 / Client: mysqlnd 8.2.29)
• Browser: Chrome 139.0.0.0
• OS: Windows 10/11
• Theme: Minimal Theme 1.0.0
• MU Plugins: None activated
• Plugins:
  • BBB Testing Dolly
  • Test Reports 1.2.0

Testing Instrutions

1. Add single_post_title() to a single.php template file
2. Create a Private Post
3. Access the post without being logged in
4. 👌 Title cannot be seen as expected

Actual Results

1. ❌ Error condition is not ocurring

Additional Notes

• Given that this cannot be not reproduced any more, its time to close this as worksforme