function deg2Radius($deg) {
	return $deg * M_PI / 180;
}

function getDistanceMeter($lat1, $lon1, $lat2, $lon2) {
	$R 		= 6371;
	$dLat 	= deg2Radius($lat2 - $lat1);
	$dLon 	= deg2Radius($lon2 - $lon1);
	$a 		= sin($dLat / 2) * sin($dLat / 2) + cos(deg2Radius($lat1)) * cos(deg2Radius($lat2)) * sin($dLon / 2) * sin($dLon / 2);
	$c 		= 2 * atan2(sqrt($a), sqrt(1 - $a));
	$d 		= $R * $c;
	return 	$d * 1000;
}


//EXAMPLE
getDistanceFromLatLonInMeter(lat1,long1,lat2,long2);
// xxxx METER