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    static public function checkBIC($bic)
    {
        return preg_match('!^[A-Z]{4}[A-Z]{2}[1-9A-Z]{2}(?:[A-Z\d]{3})?$!', $bic);
    }

    static public function normalizePhoneNumber($n)
    {
        $n = preg_replace('!(\+\d+)\(0\)!', '\\1', $n);
        $n = preg_replace('![^\d\+]!', '', $n);
        return $n;
    }

    static public function write_ini_string($in)
    {
        $out = '';