<?php/** * @package WPSEO * @subpackage Internal *//** * Class containing method for WPSEO Features. */classWPSEO_Features{/** * Checks if the premium constant exists to make sure if plugin is the premium one. * * @return bool */publicfunctionis_premium(){return(defined('WPSEO_PREMIUM_FILE'));}/** * Checks if using the free version of the plugin. * * @return bool */publicfunctionis_free(){return!$this->is_premium();}}