Question

我正在尝试使用API密钥和PHP计算两个位置之间的距离。我尝试了两个在网上找到的不同代码。他们两个都有某种问题。

两个代码，第一个代码显示错误消息“此API项目无权使用此API。”，而另一个代码根本不计算距离。

代码：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;

?>

代码：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";

?>

代码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>

Answer 1

尝试以下示例功能：

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;
  }
}

单位是K->公里，M->英里或N->海里

Answer 2

您可以点击以下链接，并且不需要任何Google API

https://gist.github.com/bmoren/22470de1cd47410e0902

如果您要按位置获取距离，则可以使用Geo Coding API获取特定地址的纬度，然后通过此链接进行操作

使用Google API获取两个位置之间的距离。的PHP

2 个答案: