问如何验证VIN号码？

EN

function validate_vin(vin)
{
  function isnumeric(mixed_var) {
    return (typeof(mixed_var) === 'number' || typeof(mixed_var) === 'string') && mixed_var !== '' && !isNaN(mixed_var);
  }
  var pattern = /^[^\Wioq]{17}$/;
  var weights = Array(8, 7, 6, 5, 4, 3, 2, 10, 0, 9, 8, 7, 6, 5, 4, 3, 2);
  var transliterations = {
    "a" : 1, "b" : 2, "c" : 3, "d" : 4,
    "e" : 5, "f" : 6, "g" : 7, "h" : 8,
    "j" : 1, "k" : 2, "l" : 3, "m" : 4,
    "n" : 5, "p" : 7, "r" : 9, "s" : 2,
    "t" : 3, "u" : 4, "v" : 5, "w" : 6,
    "x" : 7, "y" : 8, "z" : 9
  };

  vin = vin.toLowerCase();
  if(!vin.match(pattern)) { return false; }

  var sum = 0;
  for(var i=0; i<vin.length; i++) {
    if(!isnumeric(vin.charAt(i))) {
      sum += transliterations[vin.charAt(i)] * weights[i];
    } else {
      sum += parseInt(vin.charAt(i)) * weights[i];
    }  
  }

  var checkdigit = sum % 11;
  if(checkdigit == 10) { // check digit of 10 represented by X
    checkdigit = 'x';
  }

  return (checkdigit == vin.charAt(8));
}

class VIN
{
    public static $transliteration = array(
        'A'=>1, 'B'=>2, 'C'=>3, 'D'=>4, 'E'=>5, 'F'=>6, 'G'=>7, 'H'=>8, 
        'J'=>1, 'K'=>2, 'L'=>3, 'M'=>4, 'N'=>5, 'P'=>7, 'R'=>9,
        'S'=>2, 'T'=>3, 'U'=>4, 'V'=>5, 'W'=>6, 'X'=>7, 'Y'=>8, 'Z'=>9,
    );

    public static $weights = array(8,7,6,5,4,3,2,10,0,9,8,7,6,5,4,3,2);

    /***
     * The checksum method is used to validate whether or not a VIN is valid
     * It will return an array with two keys: status and message
     * The "status" will either be boolean TRUE or FALSE
     * The "message" will be a string describing the status
     */
    public static function checksum($vin)
    {
        $vin = strtoupper($vin);
        $length = strlen($vin);
        $sum = 0;

        if($length != 17)
        {
            return array('status'=>false, 'message'=>'VIN is not the right length');
        }

        for($x=0; $x<$length; $x++)
        {
            $char = substr($vin, $x, 1);

            if(is_numeric($char))
            {
                $sum += $char * self::$weights[$x];
            }
            else
            {
                if(!isset(self::$transliteration[$char]))
                {
                    return array('status'=>false, 'message'=>'VIN contains an invalid character.');
                }

                $sum += self::$transliteration[$char] * self::$weights[$x];
            }
        }

        $remainder = $sum % 11;
        $checkdigit = $remainder == 10 ? 'X' : $remainder;

        if(substr($vin, 8, 1) != $checkdigit)
        {
            return array('status'=>false, 'message'=>'The VIN is not valid.');
        }

        return array('status'=>true, 'message'=>'The VIN is valid.');
    }
}

  <?php
  /*
  =======================================================================================
  PURPOSE: VIN Validation (Check-digit validation is compulsory for all road vehicles sold in North America.)
  DETAILS: Validates 17 digit VINs by checking their formatting
  USAGE:  returns boolean or returns an array with a detailed message
  COMMENTS: This could be made more robust by checking the country codes etc..
  MORE INFO: https://en.wikipedia.org/wiki/Vehicle_identification_number
  =======================================================================================
  */

  class vinValidation {

public static $transliteration = array(
    'A'=>1, 'B'=>2, 'C'=>3, 'D'=>4, 'E'=>5, 'F'=>6, 'G'=>7, 'H'=>8,
    'J'=>1, 'K'=>2, 'L'=>3, 'M'=>4, 'N'=>5, 'P'=>7, 'R'=>9,
    'S'=>2, 'T'=>3, 'U'=>4, 'V'=>5, 'W'=>6, 'X'=>7, 'Y'=>8, 'Z'=>9,
);

public static $weights = array(8,7,6,5,4,3,2,10,0,9,8,7,6,5,4,3,2);

public function validateVIN($vin, $ret_array_status = false, $year = null) {

    //validates US/NA 1980>= VINs, if before 1980, no vin standards, this returns false
    if (!empty($year) && preg_match("/^[0-9]{4}/", $year)) {
        if ($year < 1980) return ($ret_array_status ? array('status' => false, 'message' => 'Unable to check VIN, pre-dates 1980.') : false);
    }

    $vin_length = 17; // US vin requirements >= 1980
    $vin = strtoupper(trim($vin));
    $sum = 0;

     //if (!preg_match('/^[^\Wioq]{17}$/', $vin))
    //return ($ret_array_status ? array('status'=>false, 'message'=>'VIN is not valid, not the right length.') : false);

    if (!preg_match('/^[A-HJ-NPR-Z0-9]{17}$/', $vin))
    return ($ret_array_status ? array('status'=>false, 'message'=>'VIN is not valid, VIN formatting is incorrect.') : false);

    if (preg_match('/(\w)\1{5,}/', $vin))
    return ($ret_array_status ? array('status'=>false, 'message'=>'VIN contains invalid repeating character sequence.') : false);

    for($x=0; $x < $vin_length; $x++) {
        $char = substr($vin, $x, 1);
        if(is_numeric($char)) {
            $sum += $char * self::$weights[$x];
        } else {
            if(!isset(self::$transliteration[$char]))
            return ($ret_array_status ? array('status'=>false, 'message'=>'VIN contains an invalid character.') : false);
            $sum += self::$transliteration[$char] * self::$weights[$x];
        }
    }
    $remainder = $sum % 11;
    $checkdigit = $remainder == 10 ? 'X' : $remainder;

    //echo " sum:".$sum." remain:".$remainder." check dig:".$checkdigit."\n";

    if(substr($vin, 8, 1) != $checkdigit)
    return ($ret_array_status ? array('status'=>false, 'message'=>'The VIN is not valid, failed checksum.') : false);

    // all is good return true or a value and status.
    return ($ret_array_status ? array('status'=>true, 'message'=>'The VIN is valid, passed checksum.') : true);
}


  }

  $vinClass = new vinValidation();

  // not long enough not val
  var_dump($vinClass->validateVIN('1I345678123456789', false, 2000));
  var_dump($vinClass->validateVIN('1I345678123456789'));

  echo "-----------------------------------------------------------\n";
  // not valid
  var_dump($vinClass->validateVIN('00000000012870842', true));
  var_dump($vinClass->validateVIN('00000000012870842', 1968)); //assumes faulty by year
  var_dump($vinClass->validateVIN('00000000012870842'));

  echo "-----------------------------------------------------------\n";
  // not valid
  var_dump($vinClass->validateVIN('00000000000354888', true));
  var_dump($vinClass->validateVIN('00000000000354888'));

  echo "-----------------------------------------------------------\n";
  // Fails Checksum test
  var_dump($vinClass->validateVIN('368TU79MXH4763452',false,2000));
  var_dump($vinClass->validateVIN('368TU79MXH4763452'));

  echo "-----------------------------------------------------------\n";
  // yachtzee, (returns true or array) !
  var_dump($vinClass->validateVIN('WP1AF2A56GLB91679',true));
  var_dump($vinClass->validateVIN('WP1AF2A56GLB91679'));