Server compatibility details for each WordPress release. Each page under this one records the PHP, MySQL / MariaDB and web server versions that were available and receiving security support at the time that version of WordPress shipped, together with the PHP compatibility work done in Core for that release.
For the summary matrix across every release, see WordPress Compatibility. Announcements for each release are published under Release Compatibility on the Hosting Team blog.
If you’re interested in improving this handbook, check the Github Handbook repo, or leave a message in the #hosting channel of the official WordPress Slack.