1. PHP REQUIREMENT LINK : https://little-software-stats.com/docs/introduction/system-requirements/#.XwVDsOfhWUk
2. We have restricted the script on PHP 7.0 in info.xml as script specifically needs mysql extension to work and fails while manual installation. The mysql extension was deprecated in PHP 5.6 and removed in PHP 7.0.
https://www.php.net/manual/en/mysql.php