<?php
    	function get_min_max($mac, $value)
    	{
    		$latitude = 0;
		$longitude = 0;
    		$radius = 50;
		$R = 6371;
		include '../header/header.php';
    		$reponse = $bdd->query('SELECT latitude,longitude FROM user_online WHERE mac = "'.$mac.'"');
		while ($donnees = $reponse->fetch())
		{
			$latitude = $donnees['latitude'];;
			$longitude = $donnees['longitude'];
		}
		$maxLat = $latitude + rad2deg($radius/$R);
	    	$minLat = $latitude - rad2deg($radius/$R);
	    	
	    	$maxLon = $longitude + rad2deg($radius/$R/cos(deg2rad($latitude)));
	    	$minLon = $longitude - rad2deg($radius/$R/cos(deg2rad($latitude)));
		if($value == 0)
		{
			return $maxLat;
		}
		if($value == 1)
		{
			return $minLat;
		}
		if($value == 2)
		{
			return $maxLon;
		}
		if($value == 3)
		{
			return $minLon;
		}
		return 0;
    	}
    	
    	
    	
?>