Reply To: YITH premium plugin activation

if ( !defined( 'ABSPATH' ) ) {
exit;
} // Exit if accessed directly

if ( ! class_exists( 'YIT_Plugin_Licence' ) ) {
/**
* YIT Licence Panel
*
* Setting Page to Manage Products
*
* @class YIT_Licence
* @package YITH
* @since 1.0
* @author Andrea Grillo <andrea.grillo@yithemes.com>
*/
class YIT_Plugin_Licence {
/**
* @var object The single instance of the class
* @since 1.0
*/
protected static $_instance = null;

/**
* Constructor
*
* @since 1.0
* @author Andrea Grillo <andrea.grillo@yithemes.com>
*/
public function __construct() {
//Silence is golden
}

/**
* Premium products registration
*
* @param $init string | The products identifier
* @param $secret_key string | The secret key
* @param $product_id string | The product id
*
* @return void
*
* @since 1.0
* @author Andrea Grillo <andrea.grillo@yithemes.com>
*/
public function register( $init, $secret_key, $product_id ){
if( ! function_exists( 'YITH_Plugin_Licence' ) ){
//Try to load YITH_Plugin_Licence class
yith_plugin_fw_load_update_and_licence_files();
}

YITH_Plugin_Licence()->register( $init, $secret_key, $product_id );
}

/**
* Main plugin Instance
*
* @static
* @return object Main instance
*
* @since 1.0
* @author Andrea Grillo <andrea.grillo@yithemes.com>
*/
public static function instance() {
if ( is_null( self::$_instance ) ) {
self::$_instance = new self();
}

return self::$_instance;
}

/**
* Get license activation URL
*
* @author Andrea Grillo <andrea.grillo@yithemes.com>
* @since 3.0.17
*/
public static function get_license_activation_url(){
return function_exists( 'YITH_Plugin_Licence' ) ? YITH_Plugin_Licence()->get_license_activation_url() : true;
}
add_action (‘admin_notices’, function () {$ this-> activate_license_notice ();}, fifteen );

/**
* Get protected array products
*
* @return mixed array
*
* @since 1.0
* @author Andrea Grillo <andrea.grillo@yithemes.com>
*/
public function get_products() {
return function_exists( 'YITH_Plugin_Licence' ) ? YITH_Plugin_Licence()->get_products() : array();
}
}
}

/**
* Main instance
*
* @return object
* @since 1.0
* @author Andrea Grillo <andrea.grillo@yithemes.com>
*/
if ( !function_exists( 'YIT_Plugin_Licence' ) ) {
function YIT_Plugin_Licence() {
return YIT_Plugin_Licence::instance();
}
}