PHP的身份证号码工具类

 2013-6-6
 * @copyright Copyright (c) 2003-2103 tintsoft.com
 * @license http://www.php100.com
 * @version $Id$
 */
class Utils_Idcard {
 /**
  * 中国公民身份证号码最小长度。
  */
 const CHINA_ID_MIN_LENGTH = 15;

 /**
  * 中国公民身份证号码最大长度。
  */
 const CHINA_ID_MAX_LENGTH = 18;

 /**
  * 最低年限
  */
 const MIN = 1930;

 /**
  * 省、直辖市代码表
  */
 public static $cityCode = array ("11","12","13","14","15","21","22","23","31","32","33","34","35","36","37","41","42","43","44","45","46","50","51","52","53","54","61","62","63","64","65","71","81","82","91" );

 /**
  * 每位加权因子
  */
 public static $power = array (7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2 );

 /**
  * 第18位校检码
  */
 public static $verifyCode = array ("1","0","X","9","8","7","6","5","4","3","2" );
 /**
  * 国内身份证校验
  */
 public static $cityCodes = array ('11' => '北京' );

 /**
  * 将15位身份证号码转换为18位
  *
  * @param idCard 15位身份编码
  * @return 18位身份编码
  */
 public static function conver15CardTo18($idCard) {
  $idCard18 = "";
  if (strlen ( $idCard ) != self::CHINA_ID_MIN_LENGTH) {
   return null;
  }
  if (self::isNum ( $idCard )) {
   // 获取出生年月日
   $sYear = '19' . substr ( $idCard, 6, 2 );
   $idCard18 = substr ( $idCard, 0, 6 ) . $sYear . substr ( $idCard, 8 );
   // 转换字符数组
   $iArr = str_split ( $idCard18 );
   if ($iArr != null) {
    $iSum17 = self::getPowerSum ( $iArr );
    // 获取校验位
    $sVal = self::getCheckCode18 ( $iSum17 );
    if (strlen ( $sVal ) > 0) {
     $idCard18 .= $sVal;
    } else {
     return null;
    }
   }
  } else {
   return null;
  }
  return $idCard18;
 }

 /**
  * 验证身份证是否合法
  */
 public static function validateCard($idCard) {
  $card = trim ( $idCard );
  if (self::validateIdCard18 ( $card )) {
   return true;
  }
  if (self::validateIdCard15 ( $card )) {
   return true;
  }
  return false;
 }

 /**
  * 验证18位身份编码是否合法
  *
  * @param int $idCard 身份编码
  * @return boolean 是否合法
  */
 public static function validateIdCard18($idCard) {
  $bTrue = false;
  if (strlen ( $idCard ) == self::CHINA_ID_MAX_LENGTH) {
   // 前17位
   $code17 = substr ( $idCard, 0, 17 );
   // 第18位
   $code18 = substr ( $idCard, 17, 1 );
   if (self::isNum ( $code17 )) {
    $iArr = str_split ( $code17 );
    if ($iArr != null) {
     $iSum17 = self::getPowerSum ( $iArr );
     // 获取校验位
     $val = self::getCheckCode18 ( $iSum17 );
     if (strlen ( $val ) > 0 && $val == $code18) {
      $bTrue = true;
     }
    }
   }
  }
  return $bTrue;
 }

 /**
  * 验证15位身份编码是否合法
  *
  * @param string $idCard 身份编码
  * @return boolean 是否合法
  */
 public static function validateIdCard15($idCard) {
  if (strlen ( $idCard ) != self::CHINA_ID_MIN_LENGTH) {
   return false;
  }
  if (self::isNum ( $idCard )) {
   $proCode = substr ( $idCard, 0, 2 );
   if (! isset ( self::$cityCodes [$proCode] )) {
    return false;
   }
   //升到18位
   $idCard = self::conver15CardTo18($idCard);
   return self::validateIdCard18($idCard);
  } else {
   return false;
  }
  return true;
 }

 /**
  * 根据身份编号获取年龄
  *
  * @param string idCard 身份编号
  * @return 年龄
  */
 public static function getAgeByIdCard($idCard) {
  $iAge = 0;
  if (strlen ( $idCard ) == self::CHINA_ID_MIN_LENGTH) {
   $idCard = self::conver15CardTo18 ( $idCard );
  }
  $year = substr ( $idCard, 6, 4 );
  $iCurrYear = date ( 'Y', time () );
  $iAge = $iCurrYear - $year;
  return $iAge;
 }

 /**
  * 根据身份编号获取生日天
  *
  * @param string $idCard 身份编号
  * @return NULL string
  */
 public static function getDateByIdCard($idCard) {
  $len = strlen ( $idCard );
  if ($len < self::CHINA_ID_MIN_LENGTH) {
   return null;
  } else if ($len == CHINA_ID_MIN_LENGTH) {
   $idCard = self::conver15CardTo18 ( $idCard );
  }
  return substr ( $idCard, 12, 2 );
 }

 /**
  * 根据身份编号获取性别
  *
  * @param string $idCard 身份编号
  * @return 性别(M-男，F-女，N-未知)
  */
 public static function getGenderByIdCard($idCard) {
  $sGender = "N";
  if (strlen ( $idCard ) == self::CHINA_ID_MIN_LENGTH) {
   $idCard = self::conver15CardTo18 ( $idCard );
  }
  $sCardNum = substr ( $idCard, 16, 1 );
  if (( int ) $sCardNum % 2 != 0) {
   $sGender = "M";
  } else {
   $sGender = "F";
  }
  return $sGender;
 }

 /**
  * 根据身份编号获取户籍省份
  *
  * @param string $idCard 身份编号
  * @return string
  */
 public static function getProvinceByIdCard($idCard) {
  $len = strlen ( $idCard );
  $sProvince = null;
  $sProvinNum = "";
  if ($len == self::CHINA_ID_MIN_LENGTH || $len == self::CHINA_ID_MAX_LENGTH) {
   $sProvinNum = substr ( $idCard, 0, 2 );
  }
  $sProvince = self::$cityCodes [$sProvinNum];
  return $sProvince;
 }

 /**
  * 数字验证
  *
  * @param int $val
  */
 public static function isNum($val) {
  return $val == null || $val == "" ? false : 0 < preg_match ( '/^[0-9]*$/', $val );
 }

 /**
  * 验证小于当前日期 是否有效
  *
  * @param int $iYear 待验证日期(年)
  * @param int $iMonth 待验证日期(月 1-12)
  * @param int $iDate 待验证日期(日)
  * @return 是否有效
  */
 public static function valiDate($iYear, $iMonth, $iDate) {
  $year = date ( 'Y', time () );
  if ($iYear < self::MIN || $iYear >= $year) {
   return false;
  }
  if ($iMonth < 1 || $iMonth > 12) {
   return false;
  }
  switch ($iMonth) {
   case 4 :
   case 6 :
   case 9 :
   case 11 :
    $datePerMonth = 30;
    break;
   case 2 :
    $dm = (($iYear % 4 == 0 && $iYear % 100 != 0) || ($iYear % 400 == 0)) && ($iYear > self::MIN && $iYear < $year);
    $datePerMonth = $dm ? 29 : 28;
    break;
   default :
    $datePerMonth = 31;
  }
  return ($iDate >= 1) && ($iDate <= $datePerMonth);
 }

 /**
  * 将身份证的每位和对应位的加权因子相乘之后，再得到和值
  *
  * @param array $iArr
  * @return 身份证编码。
  */
 private static function getPowerSum($iArr) {
  $iSum = 0;
  $power_len = count ( self::$power );
  $iarr_len = count ( $iArr );
  if ($power_len == $iarr_len) {
   for($i = 0; $i < $iarr_len; $i ++) {
    for($j = 0; $j < $power_len; $j ++) {
     if ($i == $j) {
      $iSum = $iSum + $iArr [$i] * self::$power [$j];
     }
    }
   }
  }
  return $iSum;
 }

 /**
  * 将power和值与11取模获得余数进行校验码判断
  *
  * @param int $iSum
  * @return 校验位
  */
 private static function getCheckCode18($iSum) {
  $sCode = "";
  switch ($iSum % 11) {
   case 10 :
    $sCode = "2";
    break;
   case 9 :
    $sCode = "3";
    break;
   case 8 :
    $sCode = "4";
    break;
   case 7 :
    $sCode = "5";
    break;
   case 6 :
    $sCode = "6";
    break;
   case 5 :
    $sCode = "7";
    break;
   case 4 :
    $sCode = "8";
    break;
   case 3 :
    $sCode = "9";
    break;
   case 2 :
    $sCode = "x";
    break;
   case 1 :
    $sCode = "0";
    break;
   case 0 :
    $sCode = "1";
    break;
  }
  return $sCode;
 }
}