TCPDFBarcode::barcode_s25 PHP Method

    protected function barcode_s25($code, $checksum = false)
    {
        $chr['0'] = '10101110111010';
        $chr['1'] = '11101010101110';
        $chr['2'] = '10111010101110';
        $chr['3'] = '11101110101010';
        $chr['4'] = '10101110101110';
        $chr['5'] = '11101011101010';
        $chr['6'] = '10111011101010';
        $chr['7'] = '10101011101110';
        $chr['8'] = '10101110111010';
        $chr['9'] = '10111010111010';
        if ($checksum) {
            // add checksum
            $code .= $this->checksum_s25($code);
        }
        if (strlen($code) % 2 != 0) {
            // add leading zero if code-length is odd
            $code = '0' . $code;
        }
        $seq = '11011010';
        $clen = strlen($code);
        for ($i = 0; $i < $clen; ++$i) {
            $digit = $code[$i];
            if (!isset($chr[$digit])) {
                // invalid character
                return false;
            }
            $seq .= $chr[$digit];
        }
        $seq .= '1101011';
        $bararray = array('code' => $code, 'maxw' => 0, 'maxh' => 1, 'bcode' => array());
        return $this->binseq_to_array($seq, $bararray);
    }