I m trying to calculate distance between two location using API key and PHP as well. I tried two different codes that i found online. both of them have some sort of problem.
Two codes, the first one has an error message as "This API project is not authorized to use this API.", while the other code doesn't calculate the distance at all.
Code :1
<?php
function getDistance($addressFrom, $addressTo, $unit = ''){
// Google API key
$apiKey = 'my key';
// Change address format
$formattedAddrFrom = str_replace(' ', '+', $addressFrom);
$formattedAddrTo = str_replace(' ', '+', $addressTo);
// Geocoding API request with start address
$geocodeFrom = file_get_contents('https://maps.googleapis.com/maps/api/geocode/json?address='.$formattedAddrFrom.'&sensor=false&key='.$apiKey);
$outputFrom = json_decode($geocodeFrom);
if(!empty($outputFrom->error_message)){
return $outputFrom->error_message;
}
// Geocoding API request with end address
$geocodeTo = file_get_contents('https://maps.googleapis.com/maps/api/geocode/json?address='.$formattedAddrTo.'&sensor=false&key='.$apiKey);
$outputTo = json_decode($geocodeTo);
if(!empty($outputTo->error_message)){
return $outputTo->error_message;
}
// Get latitude and longitude from the geodata
$latitudeFrom = $outputFrom->results[0]->geometry->location->lat;
$longitudeFrom = $outputFrom->results[0]->geometry->location->lng;
$latitudeTo = $outputTo->results[0]->geometry->location->lat;
$longitudeTo = $outputTo->results[0]->geometry->location->lng;
// Calculate distance between latitude and longitude
$theta = $longitudeFrom - $longitudeTo;
$dist = sin(deg2rad($latitudeFrom)) * sin(deg2rad($latitudeTo)) + cos(deg2rad($latitudeFrom)) * cos(deg2rad($latitudeTo)) * cos(deg2rad($theta));
$dist = acos($dist);
$dist = rad2deg($dist);
$miles = $dist * 60 * 1.1515;
// Convert unit and return distance
$unit = strtoupper($unit);
if($unit == "K"){
return round($miles * 1.609344, 2).' km';
}elseif($unit == "M"){
return round($miles * 1609.344, 2).' meters';
}else{
return round($miles, 2).' miles';
}
}
$addressFrom = 'New Jersey, United States';
$addressTo = 'New York, USA';
// Get distance in km
$distance = getDistance($addressFrom, $addressTo, "K");
echo $distance;
?>
Code :2 -
<?php
$from = "New Jersey, United States";
$to = "New York, USA";
$from = urlencode($from);
$to = urlencode($to);
$data = file_get_contents("http://maps.googleapis.com/maps/api/distancematrix/json?origins=$from&destinations=$to&language=en-EN&sensor=false");
$data = json_decode($data);
$time = 0;
$distance = 0;
foreach($data->rows[0]->elements as $road) {
$time += $road->duration->value;
$distance += $road->distance->value;
}
echo "To: ".$data->destination_addresses[0];
echo "<br/>";
echo "From: ".$data->origin_addresses[0];
echo "<br/>";
echo "Time: ".$time." seconds";
echo "<br/>";
echo "Distance: ".$distance." meters";
?>
Code 3:
<!DOCTYPE html>
<html>
<head>
<title>Calculate the distance between two locations</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" >
<style type="text/css">
.formbg { background-color: #66CCFF; padding: 10px 0 10px 20px; color: #191919;
border-radius: 10px; border: 2px solid #6D0839; width: 780px; margin: 0 auto;
}
label { font-size: 18px; }
h1 {color: #003366;}
</style>
</head>
<body>
<?php
function getRouteDistance($source_adrs, $dest_adrs, $unit){
//Send request and receive json data
$s_geocode = file_get_contents('http://maps.google.com/maps/api/geocode/json?address='.$source_adrs.'&sensor=false');
$s_latlong = json_decode($s_geocode);
$d_geocode = file_get_contents('http://maps.google.com/maps/api/geocode/json?address='.$dest_adrs.'&sensor=false');
$d_latlong = json_decode($d_geocode);
//Get latitude and longitude
$lat1 = $s_latlong->results[0]->geometry->location->lat;
$long1 = $s_latlong->results[0]->geometry->location->lng;
$lat2 = $d_latlong->results[0]->geometry->location->lat;
$long2 = $d_latlong->results[0]->geometry->location->lng;
//Calculate distance from latitude and longitude
$theta = $long1 - $long2;
$dist = sin(deg2rad($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).' KM';
} else {
return $miles.' MI';
}
}
?>
<div class="form-group row formbg">
<?php
if(($_POST['source'] != '') && ($_POST['destination'] != '')) {
$source = $_POST['source'];
$destination = $_POST['destination'];
$unit = $_POST['unit'];
$source_adrs = str_replace(' ', '+', $source);
$dest_adrs = str_replace(' ', '+', $destination);
$distance = getRouteDistance($source_adrs, $dest_adrs, $unit);
if($distance != '') {
echo 'Distance Between <b>'.$source.'</b> and <b>'.$destination.' : </b><b>'.$distance.'</b>'
.'<br/><br/>';
}
}
?>
<form action="" method="post">
<div class="form-group row">
<label class="col-xs-3 col-form-label">Enter Source Address: </label>
<div class="col-xs-5">
<input class="form-control" type="text" name="source" value="" placeholder="Source">
</div>
</div>
<div class="form-group row">
<label class="col-xs-3 col-form-label">Enter Destination Address: </label>
<div class="col-sm-5">
<input class="form-control" type="text" name="destination" value="" placeholder="Destination">
</div>
</div>
<div class="form-group row">
<label class="col-xs-3 col-form-label">Unit: </label>
<div class="col-sm-5">
<select name="unit" class="form-control">
<option value="k">Kilometer</option>
<option value="m">Mile</option>
</select>
</div>
</div>
<div class="form-group row">
<label class="col-xs-3 col-form-label"> </label>
<div class="col-sm-5">
<input class="btn btn-primary" type="submit" value="Submit"/>
</div>
</div>
</form>
</div>
</body>
</html>
