PHP count()函数讲解

<?php $xml=<<<XML<cars> <car name="Volvo"> <child/> <child/> <child/> <child/> </car> <car name="BMW"> <child/> <child/> </car> </cars> XML;$elem=new SimpleXMLElement($xml); foreach ($elem as $car) { printf("%s has %d children.<br>", $car['name'], $car->count()); } ?>

count();