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@ 2013-08-18T06:43:27Z

<?php
$string = "SomeClassString";

$d = preg_replace('~([A-Z])~', '_$1', lcfirst($string));

echo $d;

Output
Performance
VLD
References
Branches

lcfirst: documentation ( source)
preg_replace: documentation ( source)

preferences:dark modelive preview

29.91 ms | 402 KiB | 5 Q