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@ 2014-07-17T07:24:14Z

<?php

class Qq
{
}

class Ww extends Qq
{
}

var_dump(is_subclass_of('Ww', 'Qq'));
var_dump(is_subclass_of('Qq', 'Qq'));

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
is_subclass_of: documentation ( source)

preferences:dark modelive preview

57.85 ms | 402 KiB | 5 Q