By using this code it works
<?php
// calculate distance between two latitude & longitude points
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 $miles;
}
}
//echo distance(32.9697, -96.80322, 29.46786, -98.53506, "M") . " Miles<br>";
//echo distance(32.9697, -96.80322, 29.46786, -98.53506, "K") . " Kilometers<br>";
//echo distance(32.9697, -96.80322, 29.46786, -98.53506, "N") . " Nautical Miles<br>";
//echo distance(28.6077,77.2992,28.6077,77.2992, "K") . "Kilometers <br>";
?>
<?php
// calculate distance between two latitude & longitude points
function distance($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;
}
}
//echo distance(32.9697, -96.80322, 29.46786, -98.53506, "M") . " Miles<br>";
//echo distance(32.9697, -96.80322, 29.46786, -98.53506, "K") . " Kilometers<br>";
//echo distance(32.9697, -96.80322, 29.46786, -98.53506, "N") . " Nautical Miles<br>";
//echo distance(28.6077,77.2992,28.6077,77.2992, "K") . "Kilometers <br>";
?>
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