public function get_admin_notice( $level = 'minimum' ) {
		if ( 'recommended' === $level ) {
			if ( ! empty( $this->plugin_name ) ) {
				return '<p>' . $this->plugin_name . ' recommends a PHP version higher than ' . $this->recommended_version . '. Read more information about <a href="http://www.wpupdatephp.com/update/">how you can update</a>.</p>';
			} else {
				return '<p>This plugin recommends a PHP version higher than ' . $this->recommended_version . '. Read more information about <a href="http://www.wpupdatephp.com/update/">how you can update</a>.</p>';
			}
		}

		if ( ! empty( $this->plugin_name ) ) {
			return '<p>Unfortunately, ' . $this->plugin_name . ' cannot run on PHP versions older than ' . $this->minimum_version . '. Read more information about <a href="http://www.wpupdatephp.com/update/">how you can update</a>.</p>';
		} else {
			return '<p>Unfortunately, this plugin cannot run on PHP versions older than ' . $this->minimum_version . '. Read more information about <a href="http://www.wpupdatephp.com/update/">how you can update</a>.</p>';
		}
	}