Question

我希望locations变量从数据库中获取经度和纬度，从而将它们聚类显示请在这方面需要帮助，我希望从具有存储这些数据的表的数据库中获取所有经度和纬度

<script>

  function initMap() {

    var map = new google.maps.Map(document.getElementById('map'), {
      zoom: 3,
      //mkoa wa dodoma location
      center: {lat: -6.1630, lng: 35.7516}
    });

    // Create an array of alphabetical characters used to label the markers.
    var labels = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';

    // Add some markers to the map.
    // Note: The code uses the JavaScript Array.prototype.map() method to
    // create an array of markers based on a given "locations" array.
    // The map() method here has nothing to do with the Google Maps API.
    var markers = locations.map(function(location, i) {
      return new google.maps.Marker({
        position: location,
        label: labels[i % labels.length]
      });
    });

    // Add a marker clusterer to manage the markers.
    var markerCluster = new MarkerClusterer(map, markers,
        {imagePath: 'https://developers.google.com/maps/documentation/javascript/examples/markerclusterer/m'});
  }
   //kwajiri ya miji
  var locations = [
    {lat: -6.1730, lng: 35.7516},
    {lat: -6.2330, lng: 35.7523},
    {lat: -6.2330, lng: 35.7523},
    {lat: -6.2330, lng: 35.7523},
    {lat: -6.2330, lng: 35.7523},
    {lat: -6.1730, lng: 35.7516},
    {lat: -6.1730, lng: 35.7516},
    {lat: -7.773094,lng: 35.699120},
    {lat: -7.773094,lng: 35.699120},
    {lat: -7.773094,lng: 35.699120},
    {lat: -5.030461,lng: 32.819431},
    {lat: -5.030461,lng: 32.819431},
    {lat: -5.030461,lng: 32.819431},
    {lat: -5.030461,lng: 32.819431},
    {lat: -8.909401,lng: 33.460773},
    {lat: -8.909401,lng: 33.460773},
    {lat: -8.909401,lng: 33.460773},
    {lat: -6.802353,lng: 39.279556},
    {lat: -6.802353,lng: 39.279556},
    {lat: -6.802353,lng: 39.279556},
    {lat: -6.802100,lng: 39.279119},
    {lat: -6.1730, lng: 35.7516}
  ]
</script>

如您所见，变量位置在数组中

Answer 1

客户端脚本AJAX调用可能看起来像这样：

$.ajax({
    type: "GET",
    url : "https://epicsite.com/getLocations.php",
    success : function (data) 
    {
        if(data.error) {
            console.log(data.error);
        } else {
            console.log(data);
            callFunctionToAddMarkersToMap(data);
        }
    }
});

服务器端脚本可能看起来像这样：

<?php
    $con = mysqli_connect('localhost','user','pass','db');
    if (!$con) {
        die('Could not connect: ' . mysqli_error($con));
    }

    mysqli_select_db($con,"locations");
    $sql="SELECT * FROM locations";
    $result = mysqli_query($con,$sql);
    mysqli_close($con);

    return $result;
?>

因此，首先要在客户端脚本中调用要获取标记坐标的AJAX路由。然后它将调用函数callFunctionToAddMarkersToMap(data)，您将查询结果作为参数传递。然后在该函数中，您只需循环给定查询结果并将标记添加到地图。

从数据库中获取经度和纬度

1 个答案: