You can call:
$storage->removeAll($storage);
To remove all elements.
(PHP 5 >= 5.3.0, PHP 7, PHP 8)
SplObjectStorage::removeAll — Removes objects contained in another storage from the current storage
Removes objects contained in another storage from the current storage.
storageThe storage containing the elements to remove.
Returns the number of removed objects.
Example #1 SplObjectStorage::removeAll() example
<?php
$o1 = new StdClass;
$o2 = new StdClass;
$a = new SplObjectStorage();
$a[$o1] = "foo";
$b = new SplObjectStorage();
$b[$o1] = "bar";
$b[$o2] = "gee";
var_dump(count($b));
$b->removeAll($a);
var_dump(count($b));
?>
以上例程的输出类似于：
int(2) int(1)
You can call:
$storage->removeAll($storage);
To remove all elements.