define_constants(); $this->init_addon(); } public function define_constants() { define( 'ACADEMY_STOREENGINE_VERSION', '1.0' ); } public function init_addon() { // if disable then stop running addon if ( ! class_exists( \StoreEngine::class ) || ( defined( 'STOREENGINE_VERSION' ) && version_compare( STOREENGINE_VERSION, '1.0.0-beta-3', '<=' ) ) ) { return; } // integration starts Hooks::init(); Integration::init(); Ajax::init(); } public static function init(): self { static $instance = false; if ( ! $instance ) { $instance = new self(); } return $instance; } public function addon_activation_hook() { } }