Bug fixes for general core bugs in 3.7.x will end 11 May 2020 (12 months).
Bug fixes for security issues in 3.7.x will end 9 November 2020 (18 months) - Support has ended.
minimum PHP 7.1.0 Note: minimum PHP version has increased since Moodle 3.6. PHP 7.2.x and 7.3.x are supported too. PHP 7.x could have some engine limitations.