Get near by Location using latitude and longitude from php and mysql in google map Kilometer

Get near by Location using latitude and longitude from php and mysql in google map Kilometer

To search by miles  instead of kilometers, replace 6371 with .3959

<?php


$username="root";
$password="";
$database="googlemap";



// Get parameters from URL
$center_lat = 23.036730;
$center_lng = 72.516373;
$radius = 6;


$connection=mysql_connect ("localhost", $username, $password);
if (!$connection) {
  die("Not connected : " . mysql_error());
}

// Set the active mySQL database
$db_selected = mysql_select_db($database, $connection);
if (!$db_selected) {
  die ("Can\'t use db : " . mysql_error());
}

// Search the rows in the mstuser table
$query = sprintf("SELECT usermail, res_name, lat, lng, ( 6371  * acos( cos( radians('%s') ) * cos( radians( lat ) ) * cos( radians( lng ) - radians('%s') ) + sin( radians('%s') ) * sin( radians( lat ) ) ) ) AS distance FROM mstuser HAVING distance < '%s' ORDER BY distance LIMIT 0 , 20",


  mysql_real_escape_string($center_lat),
  mysql_real_escape_string($center_lng),
  mysql_real_escape_string($center_lat),
  mysql_real_escape_string($radius));

  /*$query = sprintf("SELECT address, name, lat, lng, ( 3959 * acos( cos( radians('%s') ) * cos( radians( lat ) ) * cos( radians( lng ) - radians('%s') ) + sin( radians('%s') ) * sin( radians( lat ) ) ) ) AS distance FROM markers HAVING distance < 25 ORDER BY distance LIMIT 0 , 20",


  mysql_real_escape_string($center_lat),
  mysql_real_escape_string($center_lng),
  mysql_real_escape_string($center_lat),
  mysql_real_escape_string($radius));*/
$result = mysql_query($query);

$result = mysql_query($query);
if (!$result) {
  die("Invalid query: " . mysql_error());
}

header("Content-type: application/json");
$i=0;
// Iterate through the rows, adding XML nodes for each
while ($row = @mysql_fetch_assoc($result)){


  $data[$i]['usermail'] = $row['usermail'];
  $data[$i]['res_name'] = $row['res_name'];
  $data[$i]['lng'] = $row['lng'];
  $data[$i]['lat'] = $row['lat'];
  $data[$i]['distance'] = $row['distance'];

  $i++;

}

echo json_encode($data);
?>

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