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@ 2012-11-13T22:21:34Z

<?php
$iterator = new IteratorIterator(
    new EmptyIterator()
);

var_dump($iterator instanceof SeekableIterator);
var_dump(method_exists($iterator, 'seek'));

$iterator = new NoRewindIterator(
    new EmptyIterator()
);
var_dump(method_exists($iterator, 'seek'));

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
method_exists: documentation ( source)

preferences:dark modelive preview

33.45 ms | 402 KiB | 5 Q