TCPDFBarcode::barcode_postnet PHP Method

    protected function barcode_postnet($code, $planet = false)
    {
        // bar lenght
        if ($planet) {
            $barlen = array(0 => array(1, 1, 2, 2, 2), 1 => array(2, 2, 2, 1, 1), 2 => array(2, 2, 1, 2, 1), 3 => array(2, 2, 1, 1, 2), 4 => array(2, 1, 2, 2, 1), 5 => array(2, 1, 2, 1, 2), 6 => array(2, 1, 1, 2, 2), 7 => array(1, 2, 2, 2, 1), 8 => array(1, 2, 2, 1, 2), 9 => array(1, 2, 1, 2, 2));
        } else {
            $barlen = array(0 => array(2, 2, 1, 1, 1), 1 => array(1, 1, 1, 2, 2), 2 => array(1, 1, 2, 1, 2), 3 => array(1, 1, 2, 2, 1), 4 => array(1, 2, 1, 1, 2), 5 => array(1, 2, 1, 2, 1), 6 => array(1, 2, 2, 1, 1), 7 => array(2, 1, 1, 1, 2), 8 => array(2, 1, 1, 2, 1), 9 => array(2, 1, 2, 1, 1));
        }
        $bararray = array('code' => $code, 'maxw' => 0, 'maxh' => 2, 'bcode' => array());
        $k = 0;
        $code = str_replace('-', '', $code);
        $code = str_replace(' ', '', $code);
        $len = strlen($code);
        // calculate checksum
        $sum = 0;
        for ($i = 0; $i < $len; ++$i) {
            $sum += intval($code[$i]);
        }
        $chkd = $sum % 10;
        if ($chkd > 0) {
            $chkd = 10 - $chkd;
        }
        $code .= $chkd;
        $len = strlen($code);
        // start bar
        $bararray['bcode'][$k++] = array('t' => 1, 'w' => 1, 'h' => 2, 'p' => 0);
        $bararray['bcode'][$k++] = array('t' => 0, 'w' => 1, 'h' => 2, 'p' => 0);
        $bararray['maxw'] += 2;
        for ($i = 0; $i < $len; ++$i) {
            for ($j = 0; $j < 5; ++$j) {
                $h = $barlen[$code[$i]][$j];
                $p = floor(1 / $h);
                $bararray['bcode'][$k++] = array('t' => 1, 'w' => 1, 'h' => $h, 'p' => $p);
                $bararray['bcode'][$k++] = array('t' => 0, 'w' => 1, 'h' => 2, 'p' => 0);
                $bararray['maxw'] += 2;
            }
        }
        // end bar
        $bararray['bcode'][$k++] = array('t' => 1, 'w' => 1, 'h' => 2, 'p' => 0);
        $bararray['maxw'] += 1;
        return $bararray;
    }