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<SplSubjectSplSubject::detach>
^SplSubjectLast updated: Mon, 26 Oct 2026

SplSubject::attach

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

SplSubject::attach — Attach an SplObserver

Description

public function SplSubject::attach(SplObserver $observer): void

Attaches an SplObserver so that it can be notified of updates.

Warning

This function is currently not documented; only its argument list is available.

Parameters

observer

The SplObserver to attach.

Return Values

No value is returned.


<SplSubjectSplSubject::detach>
^SplSubjectLast updated: Mon, 26 Oct 2026