zip code radius search

Something like this in your model

PHP Code:

function zipcodeRadius($lat, $lon, $radius)
{
   $radius = $radius ? $radius : 20;
   $sql = 'SELECT distinct(ZipCode) FROM zipcode  WHERE (3958*3.1415926*sqrt((Latitude-'.$lat.')*(Latitude-'.$lat.') + cos(Latitude/57.29578)*cos('.$lat.'/57.29578)*(Longitude-'.$lon.')*(Longitude-'.$lon.'))/180) <= '.$radius.';';
   $result = $this->db->query($sql);
   // get each result
   $zipcodeList = array();
   while($row = $this->db->fetch_array($result))
   {
       array_push($zipcodeList, $row['ZipCode']);
   }
   return $zipcodeList;
} 


Of course it will require that you have all of your zipcodes lat/lon encoded in the database.


http://stackoverflow.com/questions/24105...ity-search

DMyers

Thanks!