WordPress 6.4 is scheduled to be released on November 7, 2023, and it comes with some important updates on PHP compatibility front. PHP is the language that powers WordPress, and keeping it up to date is essential for security and performance. WordPress 6.4 drops support for PHP 5, which means you need to have PHP 7.0 or higher to run this version of WordPress. PHP 7.0, 7.1, 7.2, and 7.3 are no longer maintained by PHP, so they are considered insecure and obsolete versions and should not be used production. WordPress 6.4 is compatible with PHP 7.4, which is the latest stable and secure version of PHP as of October 2023. It's recommended to use PHP 7.4 with WordPress 6.4 for performance and security.. WordPress 6.4 is compatible with exceptions with PHP 8.0 and 8.1, which are the newest versions of PHP that introduce some major changes and features. By specifying the parameter name instead of the order of parameters, WordPress does not support named parameters. WordPress also has some issues with the filesystem access when using WP Filesystem FTPext and WP Filesystem SSH2 on some occasions... team of WordPress experts that love to test out new WordPress related software, WordPress plugins and WordPress themes...
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