The example Kirk provided is not the best option, there's a method "removeAll" that you can pass the SplObjectStore itself, and as the name says, remove all stored objects.
(PHP 5 >= 5.3.6, PHP 7, PHP 8)
SplObjectStorage::removeAllExcept — Supprime tous les objets du stockage courant sauf ceux contenus dans d'autres stockages
Supprime tous les objets du stockage courant sauf ceux contenus dans d'autres stockages.
storageLe stockage contenant les éléments à ne pas supprimer du stockage courant.
Retourne le nombre d'objets restants.
Exemple #1 Exemple avec SplObjectStorage::removeAllExcept()
<?php
$a = (object) 'a';
$b = (object) 'b';
$c = (object) 'c';
$foo = new SplObjectStorage;
$foo->attach($a);
$foo->attach($b);
$bar = new SplObjectStorage;
$bar->attach($b);
$bar->attach($c);
$foo->removeAllExcept($bar);
var_dump($foo->contains($a));
var_dump($foo->contains($b));
?>Résultat de l'exemple ci-dessus est similaire à :
bool(false) bool(true)
The example Kirk provided is not the best option, there's a method "removeAll" that you can pass the SplObjectStore itself, and as the name says, remove all stored objects.You may remove all elements by passing empty SplObjectStorage
$splStorage->removeAllExcept(new SplObjectStorage());