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@ 2013-03-08T10:03:28Z

<?php
echo strtoupper('hth9seh0032180ccd01500');
echo " ";
echo strtoupper('hth9seh0032180cd9f1500');

Output
Performance
VLD
References
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strtoupper: documentation ( source)

preferences:dark modelive preview

43.04 ms | 402 KiB | 5 Q