You may remove all elements by passing empty SplObjectStorage
$splStorage->removeAllExcept(new SplObjectStorage());
(PHP 5 >= 5.3.6, PHP 7)
SplObjectStorage::removeAllExcept — Removes all objects except for those contained in another storage from the current storage
Removes all objects except for those contained in another storage from the current storage.
storage
The storage containing the elements to retain in the current storage.
Nie jest zwracana żadna wartość.
Przykład #1 SplObjectStorage::removeAllExcept() example
<?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));
?>
Powyższy przykład wyświetli coś podobnego do:
bool(false) bool(true)
You may remove all elements by passing empty SplObjectStorage
$splStorage->removeAllExcept(new SplObjectStorage());
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.