See Release Notes

• Bug fixes for general core bugs in 4.3.x will end 7 October 2024 (12 months).
• Bug fixes for security issues in 4.3.x will end 21 April 2025 (18 months).
• PHP version: minimum PHP 8.0.0 Note: minimum PHP version has increased since Moodle 4.1. PHP 8.2.x is supported too.

• Moodle 4.3 Database Schema (by Marcus Green)