<?php

class nearbyPlugin {

		
		function nearbyList()
		{
			$var_location		=	$_REQUEST['location'];
			$var_city			=	$_REQUEST['city'];
			$var_region			=	$_REQUEST['region'];
			$var_country		=	$_REQUEST['country'];
			$nearby_radius		=	$_REQUEST['r_radius'];
			
			$geocode			=	file_get_contents('http://maps.google.com/maps/api/geocode/json?address='.$var_location.'+'.$var_city.'+'.$var_region.'+'.$var_country.'&sensor=false');
			$output				= 	json_decode($geocode);
			$latitude 			= 	$output->results[0]->geometry->location->lat;
			$longitude 			= 	$output->results[0]->geometry->location->lng;
			
			//echo $latitude.":".$longitude;
			$var_places			=	$this->setNearbyArray($latitude,$longitude,$nearby_radius);
			if ( isset($var_places[0]['geoplugin_place']) ) 
			{
				echo "<pre><p>Some places you may wish to visit near " . $_REQUEST['location'] . ": </p>\n";

				foreach ( $var_places as $key => $array ) 
				{
				$way_distance	=	$this->distance($latitude, $longitude, $array['geoplugin_latitude'], $array['geoplugin_longitude'], "k")		;
				echo ($key + 1) .":<br />";
				echo "\t Place: " . $array['geoplugin_place'] . "<br />";
				echo "\t State: " . $array['geoplugin_region'] . "<br />";
				echo "\t Latitude: " . $array['geoplugin_latitude'] . "<br />";
				echo "\t Longitude: " . $array['geoplugin_longitude'] . "<br />";
				echo "\t Distance: " . $way_distance . " Kilometer<br />";
				}
				echo "</pre>\n";
			}
		}
		
		function setNearbyArray($latitude,$longitude,$nearby_radius)
		{
			//No of maximum places to be returned
			$nearby_listcount	=	20;
			$host 				= 'http://www.geoplugin.net/extras/nearby.gp?lat='.$latitude.'&long='.$longitude.'&limit='.$nearby_listcount.'&radius='.$nearby_radius.'';
			$nearby 			= 	array();		
			$response 			= 	$this->fetch($host);		
			$nearby 			= 	unserialize($response);
			
			return $nearby;
		}
		
		function fetch($host) 
		{

			if ( function_exists('curl_init') ) 
			{						
			//use cURL to fetch data
			$ch = curl_init();
			curl_setopt($ch, CURLOPT_URL, $host);
			curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
			curl_setopt($ch, CURLOPT_USERAGENT, 'geoPlugin PHP Class v1.0');
			$response = curl_exec($ch);
			curl_close ($ch);
			
			} 
			else if ( ini_get('allow_url_fopen') ) 
			{			
			//fall back to fopen()
			$response = file_get_contents($host, 'r');			
			} 
			else 
			{
			trigger_error ('geoPlugin class Error: Cannot retrieve data. Either compile PHP with cURL support or enable allow_url_fopen in php.ini ', E_USER_ERROR);
			return;		
			}
		
			return $response;
		}
		
		function distance($lat1, $lon1, $lat2, $lon2, $unit) 
		{ 
  			$theta = $lon1 - $lon2; 
  			$dist = sin(deg2rad($lat1)) * sin(deg2rad($lat2)) +  cos(deg2rad($lat1)) * cos(deg2rad($lat2)) * cos(deg2rad($theta)); 
  			$dist = acos($dist); 
  			$dist = rad2deg($dist); 
  			$miles = $dist * 60 * 1.1515;
  			$unit = strtoupper($unit);
  			if ($unit == "K") {
   				return ($miles * 1.609344); 
  			} else if ($unit == "N") {
      			return ($miles * 0.8684);
    		} else {
        		return $miles;
     		}
		}

}