(PHP 5 >= 5.3.0, PHP 7)
SplObjectStorage::addAll — Adds all objects from another storage
Adds all objects-data pairs from a different storage in the current storage.
storageThe storage you want to import.
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Example #1 SplObjectStorage::addAll() example
<?php
$o = new StdClass;
$a = new SplObjectStorage();
$a[$o] = "hello";
$b = new SplObjectStorage();
$b->addAll($a);
echo $b[$o]."\n";
?>
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hello