/**  *  * 生存hashCode  *  */ function hashCode($str){
      if(empty($str))         return '';     $str = strtoupper($str);     $mdv = md5($str);     $mdv1 = substr($mdv,0,16);     $mdv2 = substr($mdv,16,16);     $crc1 = abs(crc32($mdv1));     $crc2 = abs(crc32($mdv2));     return bcmul($crc1,$crc2); }