protected function barcode_code11($code)
{
$chr = array('0' => '111121', '1' => '211121', '2' => '121121', '3' => '221111', '4' => '112121', '5' => '212111', '6' => '122111', '7' => '111221', '8' => '211211', '9' => '211111', '-' => '112111', 'S' => '112211');
$bararray = array('code' => $code, 'maxw' => 0, 'maxh' => 1, 'bcode' => array());
$k = 0;
$w = 0;
$seq = '';
$len = strlen($code);
// calculate check digit C
$p = 1;
$check = 0;
for ($i = $len - 1; $i >= 0; --$i) {
$digit = $code[$i];
if ($digit == '-') {
$dval = 10;
} else {
$dval = intval($digit);
}
$check += $dval * $p;
++$p;
if ($p > 10) {
$p = 1;
}
}
$check %= 11;
if ($check == 10) {
$check = '-';
}
$code .= $check;
if ($len > 10) {
// calculate check digit K
$p = 1;
$check = 0;
for ($i = $len; $i >= 0; --$i) {
$digit = $code[$i];
if ($digit == '-') {
$dval = 10;
} else {
$dval = intval($digit);
}
$check += $dval * $p;
++$p;
if ($p > 9) {
$p = 1;
}
}
$check %= 11;
$code .= $check;
++$len;
}
$code = 'S' . $code . 'S';
$len += 3;
for ($i = 0; $i < $len; ++$i) {
if (!isset($chr[$code[$i]])) {
return false;
}
$seq = $chr[$code[$i]];
for ($j = 0; $j < 6; ++$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;
}