The SplObserver interface
Introduction
(PHP 5 >= 5.1.0, PHP 7)
The SplObserver interface is used alongside SplSubject to implement the Observer Design Pattern.
Interface synopsis
SplObserver {
/* Methods */
abstract public update ( SplSubject $subject ) : void}
Table of Contents
- SplObserver::update — Receive update from subject
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https://www.php.net/manual/en/class.splobserver.php