public function init() {

		$this->certs['LLMS_Certificate_User'] = isset( $this->certs['LLMS_Certificate_User'] ) ? $this->certs['LLMS_Certificate_User'] : include_once 'certificates/class.llms.certificate.user.php';

		$this->export_local_hosts = array_unique(
			array(
				wp_parse_url( get_home_url(), PHP_URL_HOST ),
				wp_parse_url( get_site_url(), PHP_URL_HOST ),
			)
		);

		$this->export_blocked_stylesheet_hosts = array_unique(
			/**
			 * Filters the blocked hosts for stylesheets in certificate exports
			 *
			 * @since 4.21.0
			 *
			 * @param string[] Array of hosts to block.
			 */
			apply_filters(
				'llms_certificate_export_blocked_stylesheet_hosts',
				array(
					'fonts.googleapis.com',
				)
			)
		);

		$this->export_blocked_image_hosts = array_unique(
			/**
			 * Filters the blocked hosts for images in certificate exports
			 *
			 * @since 4.21.0
			 *
			 * @param string[] Array of hosts to block.
			 */
			apply_filters(
				'llms_certificate_export_blocked_image_hosts',
				array()
			)
		);

	}