WordPress 6.4 Release Candidate 4

The fourth release candidaterelease candidate One of the final stages in the version release cycle, this version signals the potential to be a final release to the public. Also see alpha (beta). (RC4) for WordPress 6.4 is now available!

This unplanned RC4 release does not impact the general WordPress 6.4 release date, which is scheduled for November 7, 2023.

This version of the WordPress software is under development. Please do not install, run, or test this version of WordPress on production or mission-critical websites. Instead, it’s recommended that you evaluate RC4 on a test server and site.

You can test WordPress 6.4 RC4 in three ways:

  1. PluginPlugin A plugin is a piece of software containing a group of functions that can be added to a WordPress website. They can extend functionality or add new features to your WordPress websites. WordPress plugins are written in the PHP programming language and integrate seamlessly with WordPress. These can be free in the WordPress.org Plugin Directory https://wordpress.org/plugins/ or can be cost-based plugin from a third-party: Install and activate the WordPress Beta Tester plugin on a WordPress install (select the “Bleeding edgebleeding edge The latest revision of the software, generally in development and often unstable. Also known as trunk.” channel and “BetaBeta A pre-release of software that is given out to a large group of users to trial under real conditions. Beta versions have gone through alpha testing in-house and are generally fairly close in look, feel and function to the final product; however, design changes often occur as part of the process./RCrelease candidate One of the final stages in the version release cycle, this version signals the potential to be a final release to the public. Also see alpha (beta). Only” stream).
  2. Direct download: Download the RC4 version (zip) and install it on a WordPress site.
  3. Command line: Use the following WP-CLI command:
    wp core update --version=6.4-RC4

Read the RC1 announcement for featured highlights, and check the Make WordPress Core blog for 6.4-related posts. If you are looking for detailed technical notes on new features and improvements, the WordPress 6.4 Field Guide is for you.

The WordPress 6.4 release is brought to you by an underrepresented gender release squad to welcome the participation and partnership of those who identify as gender-underrepresented in the WordPress open sourceOpen Source Open Source denotes software for which the original source code is made freely available and may be redistributed and modified. Open Source **must be** delivered via a licensing model, see GPL. project.

What’s new in RC4

Thanks to all contributors who tested the Beta/RC releases and provided feedback. The following updates have been addressed since RC3:

  • #55858 – Fixed patterns not working anymore as a post template for custom type posts
  • #55859 – Fixed positioning and styles for the new lightbox’s trigger.
  • #59812 – Fixed the following in Twenty Twenty-Four:
    • Removed the custom CSSCSS Cascading Style Sheets. for links.
    • Moved the blockBlock Block is the abstract term used to describe units of markup that, composed together, form the content or layout of a webpage using the WordPress editor. The idea combines concepts of what in the past may have achieved with shortcodes, custom HTML, and embed discovery into a single consistent API and user experience. stylesheet enqueuing to a new function.
    • Fixed height of newsletter landing pattern.
    • Resolved border colors in variations.

Get involved in testing

Your help in testing remains vital to developing the WordPress software and ensuring its quality. Check out this guide for instructions on testing WordPress 6.4 features.

If you encounter an issue, please report it to the Alpha/Beta area of the support forums or directly to WordPress Trac if you are comfortable writing a reproducible bugbug A bug is an error or unexpected result. Performance improvements, code optimization, and are considered enhancements, not defects. After feature freeze, only bugs are dealt with, with regressions (adverse changes from the previous version) being the highest priority. report. You can also check your issue against a list of known bugs.

Curious about testing releases in general? Follow along with the testing initiatives in Make Core and join the #core-test channel on Making WordPress Slack.

Update your theme or plugin

Hopefully, you have already tested your themes and plugins with WordPress 6.4 betas. With RC4, you will want to continue your testing and update the “Tested up to” version in your plugin’s readme file to 6.4.

Please post detailed information to the support forums if you find compatibility issues.


Help the Docs team put the finishing touches on end-user documentation in time for the 6.4 release. Find out what’s needed and how you can help in this post.

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Thank you @meher, @rmartinezduque and @hellofromtonya for collaborating on this post.