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@ 2014-03-14T19:30:22Z

<?php
$a=md5('QNKCDZO');
if(is_numeric($a)){
echo 'yes';
}
else echo 'no';

Output
Performance
VLD
References
Branches

is_numeric: documentation ( source)
md5: documentation ( source)

preferences:dark modelive preview

36.98 ms | 402 KiB | 5 Q