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@ 2014-06-09T19:54:50Z

<?php

function zerofill($mStretch, $iLength = 2)
{
    $sPrintfString = '%s%0' . (int)$iLength . 's';
    return sprintf($sPrintfString, $mStretch, "\0");
}

var_dump(zerofill("asd", 10));

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
sprintf: documentation ( source)

preferences:dark modelive preview

39.64 ms | 402 KiB | 5 Q