ISO 3779 VIN car decoder in PHP?

, - () , ( WMI->Init()). , , VINLookup WMI ( - 33, []).

// http://en.wikipedia.org/wiki/Vehicle_identification_number#World_Manufacturer_Identifier

define('VIN_CHARACTERS', 'ABCDEFGHJKLMNPRSTUVWXYZ1234567890'); // no I, O or Q & 0 is last.

class WMI
{
  public $country;
  public $region;
  public $low;
  public $high;

  public function __construct($country,$region,$low,$high)
  {
    $this->country = $country;
    $this->region = $region;
    $this->low = $low;
    $this->high = $high;
  }

  private static function CodeToDec($code)
  {
    if (strlen($code) != 2)
      return false;

    return (strpos(VIN_CHARACTERS, $code{0}) * strlen(VIN_CHARACTERS)) + strpos(VIN_CHARACTERS, $code{1});
  }

  public function IsMatch($vin)
  {
    // first, grab the first 2 characters
    $code = substr($vin,0,2);

    // next, see if it in range
    // we do this by converting it to a numeric
    $_low = WMI::CodeToDec($this->low);
    $_high = WMI::CodeToDec($this->high);
    $_code = WMI::CodeToDec($code);

    return (($_code >= $_low) && ($_code <= $_high));
  }

  public function __toString()
  {
    return sprintf("%s, %s (%s, %s)", $this->country, $this->region, $this->low, $this->high);
  }
}

class VINLookup
{
  private $vin;
  private $wmis = array();

  public function __construct($vin)
  {
    if (!VINLookup::IsValid($vin))
      throw new Exception('Invalid VIN specified');

    $this->vin = $vin;

    $this->Init();
  }

  private function Init()
  {
    $this->wmis = array(
      new WMI('South Africa',     'Africa',         'AA', 'AH'),
      new WMI('Ivory Coast',      'Africa',         'AJ', 'AN'),
      new WMI('(not assigned)',   'Africa',         'AP', 'A0'),
      new WMI('Angola',           'Africa',         'BA', 'BE'),
      new WMI('Kenya',            'Africa',         'BF', 'BK'),

      new WMI('United States',    'North America',  '1A', '10'),
      new WMI('Canada',           'North America',  '2A', '20'),
      new WMI('Mexico',           'North America',  '3A', '3W'),
      new WMI('Costa Rica',       'North America',  '3X', '37'),
    );
  }

  public function GetCountry()
  {
    foreach ($this->wmis as $wmi)
    {
      if ($wmi->IsMatch($this->vin))
        return $wmi;
    }
    return false;
  }

  public static function IsValid($vin)
  {
    return preg_match('/^[A-HJ-NPR-Z0-9]{17}$/',$vin);
  }
}

:

// check for a valid VIN number supplied
VINLookup::IsValid(<vin>);


// create a new VINLookup with the specified VIN
$lookup = new VINLookup(<vin>);

// retrieve the _Country_ object (above), or FALSE if no country match was found.
$lookup->GetCountry();