How to get json array in php in WeChat applet

In the WeChat applet, it is a common requirement to obtain the json array in php. This article will introduce several methods to achieve this function.

1. Use ajax to make requests

Using ajax to send network requests is a common method to obtain json arrays in php. It should be noted that the ajax request in the mini program is implemented based on the wx.request() method of the WeChat mini program.

The following is a simple example that demonstrates how to get a json array from php using ajax request:

wx.request({
  url: 'https://example.com/getData.php',
  method: 'GET',
  success(res) {
    console.log(res.data);
    // 对于php返回的json数组，可以使用JSON.parse()方法将其转换为js对象
    let data = JSON.parse(res.data);
    console.log(data);
  }
})

In this example, we use the wx.request() method to https: //example.com/getData.phpSend a GET request, and call the success() method in the callback function after the request returns. The res parameter in this method is the data we get from php.

2. Use WAMP/XAMP integrated environment

Another way to obtain the json array in php is to use the integrated environment. Two of the more popular integrated environments currently are WAMP and XAMP, both of which can be used on the Windows platform. Please refer to the official documentation for specific usage.

The advantage of using the WAMP/XAMP environment is that you can build an environment similar to a PHP server locally, and then access the PHP files you wrote through localhost. This method can help developers quickly develop and test small programs locally without uploading the code to a remote server.

The following is a simple example that demonstrates how to get the json array in php through the WAMP/XAMP environment:

1. First, start the Apache server and MySQL server in the WAMP/XAMP environment ;
2. Create a file named getData.php in the root directory of the Web server. The file code is as follows:

<?php
  // 模拟数据库查询，返回json数据
  $data = array(
    array(&#39;id&#39; => 1, 'name' => 'Tom', 'age' => 26),
    array('id' => 2, 'name' => 'Jerry', 'age' => 24),
    array('id' => 3, 'name' => 'Alice', 'age' => 25),
    array('id' => 4, 'name' => 'Bob', 'age' => 23),
  );
  echo json_encode($data);
?>

3. Write the following code in the applet, Demonstrate how to access PHP files written by yourself from the WAMP/XAMP environment:

wx.request({
  url: 'http://localhost/getData.php',
  method: 'GET',
  success(res) {
    console.log(res.data);
    let data = JSON.parse(res.data);
    console.log(data);
  }
})

Although using the integrated environment can make testing more free and convenient, it should be noted that the code needs to be uploaded in the production environment to the remote server for normal operation.

Summary

In the WeChat applet, there are many ways to obtain the json array in PHP. Among them, using ajax to obtain data from the remote server and using the integrated environment to test locally are the two most common ones. method. No matter what method is used, data security should be ensured to avoid privacy leaks and malicious attacks.

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