How to use Amap API in php to obtain surrounding POI information of the current location

How to use the Amap API in PHP to obtain the surrounding POI information of the current location

1. Overview
In modern applications, obtaining the surrounding POI (points of interest) information of the current location is A very common request. Amap provides a powerful API that allows us to easily obtain surrounding POI information through longitude and latitude. This article will introduce how to use the Amap API in PHP to implement this function.

2. Prerequisites

1. Gaode Map Developer Account: If you don’t have an account, you can register an account and create an application in the Gaode Map Developer Center.
2. PHP environment: Make sure PHP is installed locally or on the server and can run normally.

3. Obtaining the latitude and longitude
Before starting to use the Amap API, we need to obtain the latitude and longitude of the current location. This can be achieved through the HTML5 Geolocation API provided by the browser. Here is a simple sample code:

In the above code, we use thenavigator.geolocation.getCurrentPositionmethod to get the latitude and longitude of the current location and pass it toget_poi .phpfile.

4. Obtain surrounding POI information
We create a file namedget_poi.phpto obtain surrounding POI information from the Amap API. The following is a sample code:

'; echo $poi['address'] . '
'; echo '类型：' . $poi['type'] . '
'; echo '
'; } } else { echo '获取周边POI信息失败'; } ?>

In the above code, we first obtain the latitude and longitude passed from the front end (through the$_GETarray), and then construct the URL of the Amap API. Pass the obtained URL to thefile_get_contentsfunction to obtain the API response.

The returned response is a JSON-formatted string, which we use thejson_decodefunction to parse into an associative array. We can then get the name, address, and type of each POI by looping through the array.

Note: In the URL in the sample code, we replaced it with our own Amap developer Key. Make sure to replace the Key with your own Key when using the Amap API.

5. Run the sample code
Save the above sample code as aget_poi.phpfile, and place the file in a server or local environment that can run PHP. Make sure that the HTML file for obtaining the latitude and longitude is placed in the same directory as theget_poi.phpfile.

Run the HTML file to obtain the latitude and longitude in the browser and allow permission to obtain the current location. The browser will then redirect to theget_poi.phpfile, passing the latitude and longitude through the URL. The server will call the Amap API based on the latitude and longitude and return surrounding POI information.

6. Summary
Amap API provides a wealth of functions, including obtaining surrounding POI information of the current location. By using PHP and Amap API, we can easily obtain surrounding POI information and use it in the application.

The above is a simple example of using the Amap API in PHP to obtain the surrounding POI information of the current location. Hope this article is helpful to you!

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