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@ 2014-04-08T14:53:05Z

<?php
echo mb_substr('ru', -2, 2, 'UTF-8');
echo mb_strtolower('ИР');

Output
Performance
VLD
References
Branches

mb_substr: documentation ( source)
mb_strtolower: documentation ( source)

preferences:dark modelive preview

70.24 ms | 402 KiB | 5 Q