(PHP 5 >= 5.1.0, PHP 7, PHP 8)
SplSubject::detach — Detach an observer
$observer
Detaches an observer from the subject to no longer notify it of updates.
本函數還未編寫(xiě)文檔，僅有參數列表。
observer
The SplObserver to detach.
沒(méi)有返回值。