TCPDFBarcode::barcode_codabar PHP Method

    protected function barcode_codabar($code)
    {
        $chr = array('0' => '11111221', '1' => '11112211', '2' => '11121121', '3' => '22111111', '4' => '11211211', '5' => '21111211', '6' => '12111121', '7' => '12112111', '8' => '12211111', '9' => '21121111', '-' => '11122111', '$' => '11221111', ':' => '21112121', '/' => '21211121', '.' => '21212111', '+' => '11222221', 'A' => '11221211', 'B' => '12121121', 'C' => '11121221', 'D' => '11122211');
        $bararray = array('code' => $code, 'maxw' => 0, 'maxh' => 1, 'bcode' => array());
        $k = 0;
        $w = 0;
        $seq = '';
        $code = 'A' . strtoupper($code) . 'A';
        $len = strlen($code);
        for ($i = 0; $i < $len; ++$i) {
            if (!isset($chr[$code[$i]])) {
                return false;
            }
            $seq = $chr[$code[$i]];
            for ($j = 0; $j < 8; ++$j) {
                if ($j % 2 == 0) {
                    $t = true;
                    // bar
                } else {
                    $t = false;
                    // space
                }
                $w = $seq[$j];
                $bararray['bcode'][$k] = array('t' => $t, 'w' => $w, 'h' => 1, 'p' => 0);
                $bararray['maxw'] += $w;
                ++$k;
            }
        }
        return $bararray;
    }