I've recently written several blog posts for Zend (one of the brands I help manage at Perforce) covering changes in the recently released PHP 8.4. If you're curious what to look out for, and how to use some of the new major features, they're worth a read:

• What's New in PHP 8.4: Features, Changes, and Deprecations
• A Guide to PHP 8.4 Property Hooks
• Asymmetric Visibility in PHP 8.4: What It Means for PHP Teams
• HTTP Verbs Changes in PHP 8.4