function removeAllByPrefix($s)
{
if (!($rHandler = opendir($this->sPath))) {
return false;
}
$l = strlen($s);
while (($sFile = readdir($rHandler)) !== false) {
if (0 === strncmp($sFile, $s, $l)) {
@unlink($this->sPath . $sFile);
}
}
closedir($rHandler);
return true;
}