Note that PHP extensions also provide interfaces you can implement, for example JsonSerializable.
Here is the full list http://php.net/manual/en/refs.basic.other.php
Veja também as Interfaces SPL e classes reservadas.
Note that PHP extensions also provide interfaces you can implement, for example JsonSerializable.
Here is the full list http://php.net/manual/en/refs.basic.other.php