PHP development of WeChat applet: EasyWeChat implements geographical location positioning function

PHP development of WeChat mini programs: EasyWeChat implements geographical location positioning function

In recent years, WeChat mini programs have become more and more popular in mobile application development. As a convenient and fast way, WeChat applet can meet users' needs for lightweight applications and also has a good user experience. In the development process of WeChat applet, the geographical positioning function is one of the very common requirements. This article will introduce how to use PHP to develop WeChat applet and use EasyWeChat to implement the geolocation function.

1. Preparation

1. Register a WeChat developer account and create a mini program

First of all, we need to have a WeChat developer account. You can register on the WeChat open platform. After successful registration, we can create a mini program and obtain the mini program's AppID and AppSecret.

2. Install EasyWeChat

EasyWeChat is an open source PHP SDK that supports WeChat public platform and enterprise WeChat. It provides rich functions and simple and easy-to-use API, which can help We develop WeChat applications quickly. Installing EasyWeChat is very simple. It can be installed through Composer. Just execute the following command:

composer require overtrue/wechat

3. Get the user's geographical location

Before using the geographical location positioning function, we need Get the user's geographical location information. User location information can be obtained through the API of the mini program. The specific method is as follows:

wx.getLocation({
  type: 'gcj02',
  success: function(res) {
    var latitude = res.latitude;
    var longitude = res.longitude;
    // 将经纬度信息传递给后端服务器进行处理
    // ...
  }
})

2. Use EasyWeChat to implement the geographical location positioning function

1. Create an EasyWeChat application instance

In the PHP code, we need to create an EasyWeChat application instance first, and then use the instance to call the relevant API. The code to create an EasyWeChat application instance is as follows:

use EasyWeChatFactory;

$config = [
    'app_id' => 'your-app-id',
    'secret' => 'your-app-secret',
    'token' => 'your-token',
    'response_type' => 'array',
];

$app = Factory::officialAccount($config);

Among them, your-app-id, your-app-secret and your-token Need to be replaced with your own mini program AppID, AppSecret and Token.

2. Get the user’s geographical location information

Next, we can use EasyWeChat’s API to obtain the user’s geographical location information. The code example is as follows:

$response = $app->geolocation->get($latitude, $longitude);

$address = $response['result']['formatted_address'];

Among them, $latitude and $longitude are the latitude and longitude information passed by the front end to the back end. $address is the obtained user geographical location information.

3. Complete sample code

The following is a complete sample code that uses PHP and EasyWeChat to implement the geolocation function:

use EasyWeChatFactory;

$config = [
    'app_id' => 'your-app-id',
    'secret' => 'your-app-secret',
    'token' => 'your-token',
    'response_type' => 'array',
];

$app = Factory::officialAccount($config);

// 获取前端传递的经纬度信息
$latitude = $_POST['latitude'];
$longitude = $_POST['longitude'];

$response = $app->geolocation->get($latitude, $longitude);

$address = $response['result']['formatted_address'];

echo $address;

In the above code, we use $_POSTGet the latitude and longitude information passed by the front end. Send a request to the WeChat interface through the $app->geolocation->get() method and obtain the user's geographical location information. Finally, the obtained address information is returned to the front end.

4. Summary

This article introduces how to use PHP to develop WeChat applet and use EasyWeChat to implement the geographical positioning function. Through the API provided by EasyWeChat, we can easily obtain the user's geographical location information. This will provide more possibilities for the development of small programs and provide users with a better experience. I believe that through the introduction of this article, readers can quickly get started developing WeChat mini programs and implement geographical location positioning functions.

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