Use PHP and Amap API to create real-time track tracking of the map-PHP Tutorial-php.cn

Use PHP and Amap API to create real-time track tracking of the map

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Release： 2023-07-29 11:08:01

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Use PHP and Amap API to create real-time track tracking of maps

With the development of technology and the increase in people's demand for geographical location information, maps have become an indispensable part of our lives. The real-time trajectory tracking function has been widely used in many fields, such as logistics, traffic management, etc. This article will introduce how to use PHP and Amap API to create a real-time track tracking function on the map.

Before we start, we need to prepare some necessary tools and environment. First, you need an Amap developer account to obtain the development key for the Amap Map API. Secondly, we need to install php and related operating environments, such as Apache server, etc.

First, let's create a basic map page. Create a new php file, name it map.php, and add the following code to the file:

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>实时轨迹追踪</title>
    <style>
        #container{
            width: 100%;
            height: 500px;
            position: relative;
        }
    </style>
</head>
<body>
    <div id="container"></div>
<script src="https://webapi.amap.com/maps?v=1.4.15&key=yourkey"></script>
<script>
    //创建地图对象
    var map = new AMap.Map('container', {
        resizeEnable: true,
        center: [116.397428, 39.90923], //地图中心点
        zoom: 11 //地图显示的缩放级别
    });
</script>
</body>
</html>

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In the above code, we used AMap.Map to create a map object and set the center of the map Points and zoom levels. The key here needs to be replaced with your own Amap API development key.

Save and open map.php, you will see a simple map page.

Next, we will add the trajectory tracking function. First, you need to introduce the styles and scripts required for track tracking in the head tag of html. Modify the header code of map.php as follows:

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>实时轨迹追踪</title>
    <style>
        #container{
            width: 100%;
            height: 500px;
            position: relative;
        }
    </style>
    <link rel="stylesheet" href="https://a.amap.com/jsapi_demos/static/demo-center/css/demo-center.css"/>
</head>
<body>
    <div id="container"></div>
    <script src="https://webapi.amap.com/maps?v=1.4.15&key=yourkey"></script>
    <script src="https://a.amap.com/jsapi_demos/static/demo-center/js/socket.io.js"></script>
    <script>
        //创建地图对象
        var map = new AMap.Map('container', {
            resizeEnable: true,
            center: [116.397428, 39.90923], //地图中心点
            zoom: 11 //地图显示的缩放级别
        });

        //创建websocket连接
        var socket = io.connect('http://yourserver.com:3000');

        //接收服务器发送的实时位置数据
        socket.on('location', function(data){
            var lnglat = data.split(',');
            var marker = new AMap.Marker({
                position: lnglat,
                map: map
            });
            map.setCenter(lnglat);
        });
    </script>
</body>
</html>

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In the above code, we introduced socket.io.js and created a websocket connection. Listen to the real-time location data sent by the server through the socket.on method and add markers on the map.

Next, we need to push real-time location data on the server side. Create a new php file, name it server.php, and add the following code:

<?php
error_reporting(E_ALL);
set_time_limit(0);

$address = 'yourserver.com';
$port = 3000;

//创建一个Socket
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP) or die("Could not create socket
");

//绑定Socket到指定地址和端口
$result = socket_bind($socket, $address, $port) or die("Could not bind to socket
");

//开始监听Socket
$result = socket_listen($socket, 3) or die("Could not set up socket listener
");

//接受来自客户端的连接，并通过Socket发送实时位置数据
while (true) {
    $client = socket_accept($socket) or die("Could not accept incoming connection
");
    
    $location = getRealtimeLocation(); //获取实时位置数据的方法
    
    socket_write($client, $location, strlen($location)) or die("Could not write output
");
    socket_close($client);
}

//关闭Socket连接
socket_close($socket);

//获取实时位置数据的方法
function getRealtimeLocation(){
    //这里可以通过其他方式获取实时位置数据，例如从GPS设备、手机传感器等
    
    //这里简化演示，直接返回一个随机生成的经纬度坐标
    $lng = mt_rand(116000000, 117000000) / 1000000;
    $lat = mt_rand(39000000, 40000000) / 1000000;
    
    return $lng . ',' . $lat;
}
?>

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In the above code, we create a Socket server and receive connections from the client in a while loop. Get real-time location data by calling the getRealtimeLocation method and send the data to the client.

Save and run server.php.

Now, you can open the map.php page in the browser, you will see a map, and randomly generated marker points will be displayed on the map in real time, indicating the real-time location of the object. You can modify the getRealtimeLocation method to obtain actual location data according to your needs.

Through the above steps, we successfully created the real-time track tracking function of the map using PHP and Amap API. You can modify and expand it according to your own needs, such as adding more real-time data display, optimizing code logic, etc. Hope this article is helpful to you!

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