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function getDirName($artistId)
    {
        $dirName = 1;
        $startNumber = 500;
        $result = false;
        while(!$result) {
            if ($artistId <= $startNumber) {
                $result = true;
            }
            else {
                $dirName++;
                $startNumber += 500;
            }
        }
        return $dirName;
    }
                                    
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