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@ 2014-06-24T09:43:29Z

<?php
$string = '****';
var_dump(
    preg_replace('/\*{2,}/', '*', $string)
);

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
preg_replace: documentation ( source)

preferences:dark modelive preview

45.02 ms | 402 KiB | 5 Q