The SplSubject interface

    (PHP 5 >= 5.1.0, PHP 7, PHP 8)

    简介

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

    接口摘要

    interfaceSplSubject {
    publicattach(SplObserver$observer): void
    publicdetach(SplObserver$observer): void
    publicnotify(): void
    }

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