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@ 2013-01-07T07:49:15Z

<?php

$os = new SplObjectStorage;

$obj = new StdClass;
$obj2 = new StdClass;

$os[$obj] = new SplObjectStorage;
$os[$obj]->attach($obj2);

var_dump($os->count());

Output
Performance
VLD
References
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var_dump: documentation ( source)

preferences:dark modelive preview

45.6 ms | 402 KiB | 5 Q