public static function getStr( $name, $default = '' ) {
		$var = getenv( $name );
		if ( $var !== false ) {
			$var = filter_var( $var,
				\FILTER_SANITIZE_STRING,
				\FILTER_FLAG_STRIP_LOW | \FILTER_FLAG_STRIP_HIGH
			);
		}
		return ( $var === false ) ? $default : $var;
	}