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@ 2013-11-05T11:15:49Z

<?php

echo preg_replace_callback('/\d+/', function (array $m) { return strrev($m[0]); }, 'Hello World 37. What? 24 last 6650');

Output
Performance
VLD
References
Branches

preg_replace_callback: documentation ( source)
strrev: documentation ( source)

preferences:dark modelive preview

38.27 ms | 402 KiB | 5 Q