Manual do PHP Referência das Funções Outras Extensões Básicas SPL Miscellaneous Classes and Interfaces SplObserver ArrayObject::unserialize SplObserver::update The SplObserver interface (PHP 5 >= 5.1.0) Introdução The SplObserver interface is used alongside SplSubject to implement the Observer Design Pattern. Resumo da Interface SplObserver { /* Métodos */ abstract public void update ( SplSubject $subject ) } Table of ContentsSplObserver::update — Receive update from subject