来自php和mysql的googlemaps上的多个标记 [英] multiple marker on googlemaps from php and mysql

问题描述

我尝试在Google地图上制作多个标记并从数据库中提取数据。
这是我的代码

i try to make multiple markers on googlemaps and taking data from database. this is my code

<script>
<?php 


$query =  $db->query('SELECT * FROM tbl_kabkot WHERE 1=1 AND latitude !=0 AND longitude !=0');
  while($row = $query->fetch()){                            

                               $nama_kabkot = $row[nama_kabkot];
                               $longitude = $row[longitude];                              
                               $latitude = $row[latitude]; 


 ?>
      var markers = [
                      [<?= $nama_kabkotv ?>, <?= $latitude ?>, <?= $longitude ?>]
];
<?php } ?>

function initMap() {
    var latlng = new google.maps.LatLng(-33.92, 151.25);
    var myOptions = {
        zoom: 10,
        center: latlng,
        mapTypeId: google.maps.MapTypeId.ROADMAP,
        mapTypeControl: false
    };
    var map = new google.maps.Map(document.getElementById("peta"),myOptions);
    var infowindow = new google.maps.InfoWindow(), marker, i;
    for (i = 0; i < markers.length; i++) {  
        marker = new google.maps.Marker({
            position: new google.maps.LatLng(markers[i][1], markers[i][2]),
            map: map
        });
        google.maps.event.addListener(marker, 'click', (function(marker, i) {
            return function() {
                infowindow.setContent(markers[i][0]);
                infowindow.open(map, marker);
            }
        })(marker, i));
    }
}
</script>

但是这段代码只显示数据库中的一个值。
如何显示数据库中的多个标记？

But this code only shows one value from the database. how can i show a multiple markers with database?

推荐答案

最初的sql查询有一个冗余其中子句是由于 1 = 1 但我假设它用于测试。原始代码中的标记变量会在循环中的每次迭代中被覆盖，所以数组只有一个项目。

The initial sql query has a redundant where clause due to 1=1 but I assume that is for testing. The markers variable in the original code is being over-written on each iteration through the loop so the array will only have one item.

<?php
    /* lat/lng data will be added to this array */
    $locations=array();
    $query =  $db->query('SELECT * FROM tbl_kabkot WHERE 1=1 AND latitude !=0 AND longitude !=0');
        while( $row = $query->fetch() ){

            $nama_kabkot = $row['nama_kabkot'];
            $longitude = $row['longitude'];                              
            $latitude = $row['latitude'];

            /* Each row is added as a new array */
            $locations[]=array( 'name'=>$nama_kabkot, 'lat'=>$latitudem, 'lng'=>$longitude );
        }
        /* Convert data to json */
        $markers = json_encode( $locations );
?>
<script type='text/javascript'>
    <?php
        echo "var markers=$markers;\n";

    ?>

    function initMap() {

        var latlng = new google.maps.LatLng(-33.92, 151.25);
        var myOptions = {
            zoom: 10,
            center: latlng,
            mapTypeId: google.maps.MapTypeId.ROADMAP,
            mapTypeControl: false
        };

        var map = new google.maps.Map(document.getElementById("peta"),myOptions);
        var infowindow = new google.maps.InfoWindow(), marker, lat, lng;
        var json=JSON.parse( markers );

        for( var o in json ){

            lat = json[ o ].lat;
            lng=json[ o ].lng;
            name=json[ o ].name;

            marker = new google.maps.Marker({
                position: new google.maps.LatLng(lat,lng),
                name:name,
                map: map
            }); 
            google.maps.event.addListener( marker, 'click', function(e){
                infowindow.setContent( this.name );
                infowindow.open( map, this );
            }.bind( marker ) );
        }
    }
    </script>

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