Practical tutorial: Using PHP and Baidu Map API to implement POI search function

Practical Tutorial: Using PHP and Baidu Map API to implement POI search function

Introduction:
With the development of the Internet, map applications have become an indispensable part of people's daily lives. With the help of map applications, we can find destinations in unfamiliar cities and find surrounding restaurants, hotels, etc., which provides great convenience. In map applications, the implementation of POI (Points Of Interest) search function allows us to find places of interest more conveniently. This article will teach you how to use PHP and Baidu Map API to implement POI search function.

1. Preparation

Before starting, we need to prepare the following environments and tools:

1. PHP environment: Make sure it has been installed on your computer PHP environment and can run normally.
2. Baidu Map Open Platform Account: Register an account on Baidu Map Open Platform, create an application, and obtain the API key.
3. Text editor: Text editor for writing PHP code, such as Sublime Text, Visual Studio Code, etc.

2. Obtain surrounding POI information

Next, we will use the "Place API" of Baidu Map API to obtain surrounding POI information. First, we need to create a PHP file and introduce the SDK file of Baidu Map API in the file:

<?php
require_once 'baidu_map_sdk.php';

// 定义API密钥
$ak = 'your_api_key';

// 创建百度地图实例
$map = new BaiduMap($ak);

Then, we can call Baidu Map's "Place API" in the PHP code to perform POI search. For example, we want to search for the keyword "restaurant" and specify the latitude and longitude of a center point and the search radius:

// 设置搜索关键词
$keyword = '餐馆';

// 设置中心点经纬度
$location = '39.915,116.404';

// 设置搜索半径（单位：米）
$radius = 1000;

// 调用Place API进行搜索
$response = $map->placeSearch($keyword, $location, $radius);

Then, we can process and display the search results. For example, you can use PHP's foreach loop to traverse the search results and obtain the name, address and distance information of each POI:

// 遍历搜索结果
foreach ($response['results'] as $result) {
    $name = $result['name'];
    $address = $result['address'];
    $distance = $result['distance'];

    echo "名称：{$name}<br>";
    echo "地址：{$address}<br>";
    echo "距离：{$distance}米<br><br>";
}

Through the above steps, we can use PHP and Baidu Map API to implement the POI search function .

3. Complete code example

The following is a complete PHP code example that demonstrates how to use PHP and Baidu Map API to implement the POI search function:

<?php
require_once 'baidu_map_sdk.php';

// 定义API密钥
$ak = 'your_api_key';

// 创建百度地图实例
$map = new BaiduMap($ak);

// 设置搜索关键词
$keyword = '餐馆';

// 设置中心点经纬度
$location = '39.915,116.404';

// 设置搜索半径（单位：米）
$radius = 1000;

// 调用Place API进行搜索
$response = $map->placeSearch($keyword, $location, $radius);

// 遍历搜索结果
foreach ($response['results'] as $result) {
    $name = $result['name'];
    $address = $result['address'];
    $distance = $result['distance'];

    echo "名称：{$name}<br>";
    echo "地址：{$address}<br>";
    echo "距离：{$distance}米<br><br>";
}

Please note , "your_api_key" in the above example needs to be replaced with the API key of the application you created on the Baidu Map Open Platform.

Conclusion:
This article leads everyone to implement the POI search function by using PHP and Baidu Map API. With this feature, we can easily integrate maps into our website or app and provide convenient location search capabilities. I hope this article helps you in practice!

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