Zip radius search

I am making a website that allows users to search suppliers in my product database. I want to have a zip radius search function to narrow down the results to a more meaningful level.
I copied from online free codes demo.php and zipcode.php and made a test page Radius.html. By trial, these three files seem work fine together. I can get a list of zip codes from my database that are within the range I specified in the Radius.html.

when it comes to integrate the scripts to my actual search page Home2.html and results page Results2.php, I am totally lost as a layman to PHP/MySql coding and newbie to Dreamweaver (I am using Dreamweaver CS3).

Any help would be highly appreciated. I have enclosed the srcipts of the five files I mentioned above.

1. Radius.html
<div id="mainContent">
    <form id="form2" name="form2" method="post" action="demo.php">
      Within a
      radius of
      <label>
      <select name="Radius" id="Radius">
        <option value="50">50</option>
        <option value="100" selected="selected">100</option>
        <option value="150">150</option>
        <option value="200">200</option>
        <option value="250">250</option>
        <option value="300">300</option>
      </select>
      </label>
     miles from
     <label>Destination Zip
     <input name="Destination" type="text" id="Destination" maxlength="7" />
     </label>
     <p>

2. demo.php
<?php

/*  
   DEMO for using the zipcode PHP class. By: Micah Carrick
   Questions?  Comments?  Suggestions?  email@micahcarrick.com
*/

require_once('zipcode.php');      // zip code class


// Open up a connection to the database.  The sql required to create the MySQL
// tables and populate them with the data is in the /sql subfolder.  You can
// upload those sql files using phpMyAdmin or a MySQL prompt.  You will have to
// modify the below information to your database information.  
mysql_connect('localhost','user','pwd') or die(mysql_error());
mysql_select_db('db') or die(mysql_error());


// Below is an example of how to calculate the distance between two zip codes.

$Radius = $_POST['Radius'];
$Destination = $_POST['Destination'];
echo '<h3>zip codes withing the radius of your destination</h3>';

$z = new zipcode_class;

$zips = $z->get_zips_in_range($Destination, $Radius, _ZIPS_SORT_BY_DISTANCE_ASC, true);


if ($zips === false) echo 'Error: '.$z->last_error;
else {
   
   foreach ($zips as $key => $value) {
      echo "Zip code <b>$key</b> is <b>$value</b> miles away from <b>'$Destination'</b>.<br />";
   }
   
   // One thing you may want to do with this is create SQL from it. For example,
   // iterate through the array to create SQL that is something like:
   // WHERE zip_code IN ('93001 93002 93004')
   // and then use that condition in your query to find all pizza joints or
   // whatever you're using it for. Make sense? Hope so.
   
   echo "<br /><i>get_zips_in_range() executed in <b>".$z->last_time."</b> seconds.</i><br />";
}

// And one more example of using the class to simply get the information about
// a zip code.  You can then do whatever you want with it.  The array returned
// from the function has the database field names as the keys.  I just do a
// couple string converstions to make them more readable.

echo '<h3>details about your destination</h3>';

$Destination = $_POST['Destination'];
$details = $z->get_zip_details($Destination);

if ($details === false) echo 'Error: '.$z->last_error;
else {
   foreach ($details as $key => $value) {
      $key = str_replace('_',' ',$key);
      $key = ucwords($key);
      echo "$key:&nbsp;$value<br />";
   }
}
?>

3. zipcode.php

<?php
/*******************************************************************************
 *                ZIP Code and Distance Claculation Class
 *******************************************************************************
 *      Author:     Micah Carrick
 *      Email:      email@micahcarrick.com
 *      Website:    http://www.micahcarrick.com
 *
 *      File:       zipcode.class.php
 *      Version:    1.2.0
 *      Copyright:  (c) 2005 - Micah Carrick
 *                  You are free to use, distribute, and modify this software
 *                  under the terms of the GNU General Public License.  See the
 *                  included license.txt file.
 *
 *******************************************************************************
 *  VERION HISTORY:
 *      v1.2.0 [Oct 22, 2006] - Using a completely new database based on user
                                contributions which resolves many data bugs.
                              - Added sorting to get_zips_in_range()
                              - Added ability to include/exclude the base zip
                                from get_zips_in_range()
                             
 *      v1.1.0 [Apr 30, 2005] - Added Jeff Bearer's code to make it MUCH faster!
 
 *      v1.0.1 [Apr 22, 2005] - Fixed a typo :)
 
 *      v1.0.0 [Apr 12, 2005] - Initial Version
 *
 *******************************************************************************
 *  DESCRIPTION:
 
 *    A PHP Class and MySQL table to find the distance between zip codes and
 *    find all zip codes within a given mileage or kilometer range.
 *      
 *******************************************************************************
*/

// constants for setting the $units data member
define('_UNIT_MILES', 'm');
define('_UNIT_KILOMETERS', 'k');

// constants for passing $sort to get_zips_in_range()
define('_ZIPS_SORT_BY_DISTANCE_ASC', 1);
define('_ZIPS_SORT_BY_DISTANCE_DESC', 2);
define('_ZIPS_SORT_BY_ZIP_ASC', 3);
define('_ZIPS_SORT_BY_ZIP_DESC', 4);

// constant for miles to kilometers conversion
define('_M2KM_FACTOR', 1.609344);

class zipcode_class {

   var $last_error = "";            // last error message set by this class
   var $last_time = 0;              // last function execution time (debug info)
   var $units = _UNIT_MILES;        // miles or kilometers
   var $decimals = 2;               // decimal places for returned distance

   function get_distance($zip1, $zip2) {

      // returns the distance between to zip codes.  If there is an error, the
      // function will return false and set the $last_error variable.
     
      $this->chronometer();         // start the clock
     
      if ($zip1 == $zip2) return 0; // same zip code means 0 miles between. :)
   
   
      // get details from database about each zip and exit if there is an error
     
      $details1 = $this->get_zip_point($zip1);
      $details2 = $this->get_zip_point($zip2);
      if ($details1 == false) {
         $this->last_error = "No details found for zip code: $zip1";
         return false;
      }
      if ($details2 == false) {
         $this->last_error = "No details found for zip code: $zip2";
         return false;
      }    


      // calculate the distance between the two points based on the lattitude
      // and longitude pulled out of the database.
     
      $miles = $this->calculate_mileage($details1[0], $details2[0], $details1[1], $details2[1]);
     
      $this->last_time = $this->chronometer();
 
      if ($this->units == _UNIT_KILOMETERS) return round($miles * _M2KM_FACTOR, $this->decimals);
      else return round($miles, $this->decimals);       // must be miles
     
   }  

   function get_zip_details($zip) {
     
      // This function pulls the details from the database for a
      // given zip code.
 
      $sql = "SELECT lat AS lattitude, lon AS longitude, city, county, state_prefix,
              state_name, area_code, time_zone
              FROM zip_code
              WHERE zip_code='$zip'";
             
      $r = mysql_query($sql);
      if (!$r) {
         $this->last_error = mysql_error();
         return false;
      } else {
         $row = mysql_fetch_array($r, MYSQL_ASSOC);
         mysql_free_result($r);
         return $row;      
      }
   }

   function get_zip_point($zip) {
   
      // This function pulls just the lattitude and longitude from the
      // database for a given zip code.
     
      $sql = "SELECT lat, lon from zip_code WHERE zip_code='$zip'";
      $r = mysql_query($sql);
      if (!$r) {
         $this->last_error = mysql_error();
         return false;
      } else {
         $row = mysql_fetch_array($r);
         mysql_free_result($r);
         return $row;      
      }      
   }

   function calculate_mileage($lat1, $lat2, $lon1, $lon2) {
 
      // used internally, this function actually performs that calculation to
      // determine the mileage between 2 points defined by lattitude and
      // longitude coordinates.  This calculation is based on the code found
      // at http://www.cryptnet.net/fsp/zipdy/
       
      // Convert lattitude/longitude (degrees) to radians for calculations
      $lat1 = deg2rad($lat1);
      $lon1 = deg2rad($lon1);
      $lat2 = deg2rad($lat2);
      $lon2 = deg2rad($lon2);
     
      // Find the deltas
      $delta_lat = $lat2 - $lat1;
      $delta_lon = $lon2 - $lon1;
      
      // Find the Great Circle distance
      $temp = pow(sin($delta_lat/2.0),2) + cos($lat1) * cos($lat2) * pow(sin($delta_lon/2.0),2);
      $distance = 3956 * 2 * atan2(sqrt($temp),sqrt(1-$temp));

      return $distance;
   }
   
   function get_zips_in_range($zip, $range, $sort=1, $include_base) {
       
      // returns an array of the zip codes within $range of $zip. Returns
      // an array with keys as zip codes and values as the distance from
      // the zipcode defined in $zip.
     
      $this->chronometer();                     // start the clock
     
      $details = $this->get_zip_point($zip);  // base zip details
      if ($details == false) return false;
     
      // This portion of the routine  calculates the minimum and maximum lat and
      // long within a given range.  This portion of the code was written
      // by Jeff Bearer (http://www.jeffbearer.com). This significanly decreases
      // the time it takes to execute a query.  My demo took 3.2 seconds in
      // v1.0.0 and now executes in 0.4 seconds!  Greate job Jeff!
     
      // Find Max - Min Lat / Long for Radius and zero point and query
      // only zips in that range.
      $lat_range = $range/69.172;
      $lon_range = abs($range/(cos($details[0]) * 69.172));
      $min_lat = number_format($details[0] - $lat_range, "4", ".", "");
      $max_lat = number_format($details[0] + $lat_range, "4", ".", "");
      $min_lon = number_format($details[1] - $lon_range, "4", ".", "");
      $max_lon = number_format($details[1] + $lon_range, "4", ".", "");

      $return = array();    // declared here for scope

      $sql = "SELECT Zip, lat, lon FROM Suppliers2 ";
      if (!$include_base) $sql .= "WHERE Zip <> '$zip' AND ";
      else $sql .= "WHERE ";
      $sql .= "lat BETWEEN '$min_lat' AND '$max_lat'
               AND lon BETWEEN '$min_lon' AND '$max_lon'";
             
      $r = mysql_query($sql);
     
      if (!$r) {    // sql error

         $this->last_error = mysql_error();
         return false;
         
      } else {
         
         while ($row = mysql_fetch_row($r)) {
   
            // loop through all 40 some thousand zip codes and determine whether
            // or not it's within the specified range.
           
            $dist = $this->calculate_mileage($details[0],$row[1],$details[1],$row[2]);
            if ($this->units == _UNIT_KILOMETERS) $dist = $dist * _M2KM_FACTOR;
            if ($dist <= $range) {
               $return[str_pad($row[0], 5, "0", STR_PAD_LEFT)] = round($dist, $this->decimals);
            }
         }
         mysql_free_result($r);
      }
     
      // sort array
      switch($sort)
      {
         case _ZIPS_SORT_BY_DISTANCE_ASC:
            asort($return);
            break;
           
         case _ZIPS_SORT_BY_DISTANCE_DESC:
            arsort($return);
            break;
           
         case _ZIPS_SORT_BY_ZIP_ASC:
            ksort($return);
            break;
           
         case _ZIPS_SORT_BY_ZIP_DESC:
            krsort($return);
            break;
      }
     
      $this->last_time = $this->chronometer();
     
      if (empty($return)) return false;
      return $return;
   }

   function chronometer()  {
 
   // chronometer function taken from the php manual.  This is used primarily
   // for debugging and anlyzing the functions while developing this class.  
 
   $now = microtime(TRUE);  // float, in _seconds_
   $now = $now + time();
   $malt = 1;
   $round = 7;
 
   if ($this->last_time > 0) {
       /* Stop the chronometer : return the amount of time since it was started,
       in ms with a precision of 3 decimal places, and reset the start time.
       We could factor the multiplication by 1000 (which converts seconds
       into milliseconds) to save memory, but considering that floats can
       reach e+308 but only carry 14 decimals, this is certainly more precise */
     
       $retElapsed = round($now * $malt - $this->last_time * $malt, $round);
     
       $this->last_time = $now;
     
       return $retElapsed;
   } else {
       // Start the chronometer : save the starting time
   
       $this->last_time = $now;
     
       return 0;
   }
}

}

4. Home2.html
<form action="Results2.php" method="post">
  <div align="center" class="style10">
    <p>Please enter some key words of the products you look for (at least 4 characters)</p>
    <p><br />
      <input name="searchterm" type="text" size="60"/>
    </p>
    <p>Within
      <label>
      <select name="Radius" id="Radius">
        <option value="50">50</option>
        <option value="100" selected="selected">100</option>
        <option value="150">150</option>
        <option value="200">200</option>
        <option value="250">250</option>
        <option value="300">300</option>
      </select>
      </label>
miles from
<label>Destination Zip
<input name="Destination" type="text" id="Destination" maxlength="7" />
</label>
    </p>
    <p>        <br />
      <input type="submit" name="submit" value="Search"/>
      <input type="reset" name="Reset button" id="Reset button" value="Reset" />
    </p>
    <p>&nbsp;</p>
    <p>Register to get more detailed search results</p>
    <p><a href="Registration1.php">Register</a> <span class="style9">|</span> <a href="Login1.php">Login</a></p>
    <p>&nbsp;</p>
  </div>
</form>

5. Results2.php
<?php require_once('Connections/sb0.php'); ?>
<?php require_once('zipcode.php'); ?>
<?php
if (!function_exists("GetSQLValueString")) {
function GetSQLValueString($theValue, $theType, $theDefinedValue = "", $theNotDefinedValue = "")
{
  $theValue = get_magic_quotes_gpc() ? stripslashes($theValue) : $theValue;

  $theValue = function_exists("mysql_real_escape_string") ? mysql_real_escape_string($theValue) : mysql_escape_string($theValue);

  switch ($theType) {
    case "text":
      $theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
      break;    
    case "long":
    case "int":
      $theValue = ($theValue != "") ? intval($theValue) : "NULL";
      break;
    case "double":
      $theValue = ($theValue != "") ? "'" . doubleval($theValue) . "'" : "NULL";
      break;
    case "date":
      $theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
      break;
    case "defined":
      $theValue = ($theValue != "") ? $theDefinedValue : $theNotDefinedValue;
      break;
  }
  return $theValue;
}
}

$currentPage = $_SERVER["PHP_SELF"];

$maxRows_Recordset1 = 25;
$pageNum_Recordset1 = 0;
if (isset($_GET['pageNum_Recordset1'])) {
  $pageNum_Recordset1 = $_GET['pageNum_Recordset1'];
}
$startRow_Recordset1 = $pageNum_Recordset1 * $maxRows_Recordset1;

$searchterm_Recordset1 = "4X4X4";
if (isset($_REQUEST['searchterm'])) {
  $searchterm_Recordset1 = $_REQUEST['searchterm'];
}
mysql_select_db($database_sb0, $sb0);

$query_Recordset1 = sprintf("SELECT * FROM Boxes, Suppliers2 WHERE MATCH (Description) AGAINST ( %s) AND Boxes.SID = Suppliers2.SID ORDER BY Suppliers2.Supplier_Name ASC", GetSQLValueString($searchterm_Recordset1, "text"));
$query_limit_Recordset1 = sprintf("%s LIMIT %d, %d", $query_Recordset1, $startRow_Recordset1, $maxRows_Recordset1);
$Recordset1 = mysql_query($query_limit_Recordset1, $sb0) or die(mysql_error());
$row_Recordset1 = mysql_fetch_assoc($Recordset1);

if (isset($_GET['totalRows_Recordset1'])) {
  $totalRows_Recordset1 = $_GET['totalRows_Recordset1'];
} else {
  $all_Recordset1 = mysql_query($query_Recordset1);
  $totalRows_Recordset1 = mysql_num_rows($all_Recordset1);
}
$totalPages_Recordset1 = ceil($totalRows_Recordset1/$maxRows_Recordset1)-1;

$queryString_Recordset1 = "";
if (!empty($_SERVER['QUERY_STRING'])) {
  $params = explode("&", $_SERVER['QUERY_STRING']);
  $newParams = array();
  foreach ($params as $param) {
    if (stristr($param, "pageNum_Recordset1") == false && 
        stristr($param, "totalRows_Recordset1") == false) {
      array_push($newParams, $param);
    }
  }
  if (count($newParams) != 0) {
    $queryString_Recordset1 = "&" . htmlentities(implode("&", $newParams));
  }
}
$queryString_Recordset1 = sprintf("&totalRows_Recordset1=%d%s&searchterm=%s",
  $totalRows_Recordset1, $queryString_Recordset1, urlencode($searchterm_Recordset1));

?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
<style type="text/css">
<!--
.style1 {color: #0033FF}
.style14 {font-family: "book Antiqua"; font-size: 24pt;}
.style15 {font-family: "segoe Print"; font-size: small;}
.style2 {      color: #00FF00;
      font-family: "script MT Bold";
      font-size: larger;
}
.style5 {font-family: "book Antiqua"}
.style22 {      color: #00FF00;
      font-family: "script MT Bold";
      font-size: 36px;
}
.style20 {font-family: "book Antiqua";
      font-size: 36pt;
      color: #0033FF;
}
.style21 {font-size: 24pt}
.style3 {      font-family: "book Antiqua", "script MT Bold";
      font-size: 24pt;
      color: #0033FF;
}
-->
</style>
</head>

<body>

<form action="http://www.nnsourcebook.com/Results.php" method="post" name="form1" target="_blank" id="form2">
  <div align="left">
    <p><span class="style1"><span class="style3">N</span><span class="style20"><span class="style22">ⁿ</span><span class="style21">SourceBook</span></span> <span class="style15">your sourcing assisstant</span></span></p>
  </div>
  <label></label>
  <label></label>
  <div align="left"></div>
  <p align="right"><span class="style9"><a href="Home.html" title="Home" target="_blank">Home</a> | <a href="Company.html" title="Company" target="_blank">Company</a> | <a href="Categories.html" title="Category" target="_blank">Cateogries</a> | <a href="Contact.html" target="_blank">Contact</a></span></p>
</form>

<p>Records <?php echo ($startRow_Recordset1 + 1) ?> to <?php echo min($startRow_Recordset1 + $maxRows_Recordset1, $totalRows_Recordset1) ?> of <?php echo $totalRows_Recordset1 ?></p>
<table border="0">
  <tr>
    <td><?php if ($pageNum_Recordset1 > 0) { // Show if not first page ?>
          <a href="<?php printf("%s?pageNum_Recordset1=%d%s", $currentPage, 0, $queryString_Recordset1); ?>">First</a>
          <?php } // Show if not first page ?>
    </td>
  <td><?php if ($pageNum_Recordset1 > 0) { // Show if not first page ?>
          <a href="<?php printf("%s?pageNum_Recordset1=%d%s", $currentPage, max(0, $pageNum_Recordset1 - 1), $queryString_Recordset1); ?>">Previous</a>
          <?php } // Show if not first page ?>
    </td>
  <td><?php if ($pageNum_Recordset1 < $totalPages_Recordset1) { // Show if not last page ?>
          <a href="<?php printf("%s?pageNum_Recordset1=%d%s", $currentPage, min($totalPages_Recordset1, $pageNum_Recordset1 + 1), $queryString_Recordset1); ?>">Next</a>
          <?php } // Show if not last page ?>
    </td>
  <td><?php if ($pageNum_Recordset1 < $totalPages_Recordset1) { // Show if not last page ?>
          <a href="<?php printf("%s?pageNum_Recordset1=%d%s", $currentPage, $totalPages_Recordset1, $queryString_Recordset1); ?>">Last</a>
          <?php } // Show if not last page ?>
    </td>
  </tr>
</table>
<table width="1000" border="1" align="left">
  <tr>
    <th width="50" scope="col"><div align="left">Supplier_Product_Code</div></th>
    <th scope="col">Description</th>
    <th width="200" scope="col"><div align="center">Supplier_Name</div></th>
    <th width="50" scope="col"><div align="center">Zip</div></th>
   
  </tr>
  <?php do { ?>
    <tr>
      <td width="50"><?php echo $row_Recordset1['Supplier_Product_Code']; ?></td>
      <td><?php echo $row_Recordset1['Description']; ?></td>
      <td width="200"><div align="left"><?php echo $row_Recordset1['Supplier_Name']; ?></div></td>
      <td width="50"><div align="left"><?php echo $row_Recordset1['Zip']; ?></div></td>
     
    </tr>
    <?php } while ($row_Recordset1 = mysql_fetch_assoc($Recordset1)); ?>
</table>


</body>
</html>
<?php
mysql_free_result($Recordset1);
?>