See Release Notes

• Bug fixes for general core bugs in 4.2.x will end 22 April 2024 (12 months).
• Bug fixes for security issues in 4.2.x will end 7 October 2024 (18 months).
• PHP version: minimum PHP 8.0.0 Note: minimum PHP version has increased since Moodle 4.1. PHP 8.1.x is supported too.

• Moodle 4.2 Database Schema (by Marcus Green)