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PHP Manual [The SplSubject interface]

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PHP Manual || Miscellaneous Classes and Interfaces

(PHP 5 >= 5.1.0, PHP 7)

The SplSubject interface is used alongside SplObserver to implement the Observer Design Pattern.

SplSubject {
/* Methods */
abstract public attach ( SplObserver $observer ) : void
abstract public detach ( SplObserver $observer ) : void
abstract public notify ( void ) : void
}


PHP Manual || Miscellaneous Classes and Interfaces