JetBrains releases EAP versions (free to use) every few months. While slightly less stable, you get the latest features for free.

That being said, here's an article on PhpStorm 2024 and Github:

If the subscription cost is a barrier and you don't qualify for the programs above, consider high-quality free alternatives rather than risking your security with pirated keys: PHP Intelephense extension, it provides a near-IDE experience. A telemetry-free version of VS Code. Sublime Text:

: Unauthorized keys are frequently revoked by JetBrains. Using a "fixed" version often prevents you from receiving critical security patches and new features. DMCA Takedowns

: Users can explore the full feature set with a 30-day free trial before committing to a subscription. What's New in PhpStorm 2024