How to implement multi-language translation function in WeChat applet with PHP

With the popularity and globalization of WeChat mini programs, multi-language translation functions have become a need for more and more mini program developers. To realize the multi-language translation function in the mini program, you need to use the back-end server language support. As one of the commonly used programming languages ​​​​on the server side, PHP has the characteristics of open source, flexibility, and good compatibility. In realizing the multi-language translation function of the mini program, It also has a wide range of applications. This article introduces how PHP implements the multi-language translation function in WeChat applet.

1. Implementation principle of multi-language translation function based on PHP

To implement multi-language translation function in WeChat applet, texts in different languages ​​can be saved on the back-end server, and the front-end can call The API interface obtains text information and displays it on the page. In PHP, you can store multilingual text in arrays and assign text in multiple languages ​​to different array elements. When loading the page, the front-end selects the language to be displayed by passing parameters, and obtains the corresponding language array in the back-end service, thereby realizing the function of multi-language text display in the front-end page.

2. Steps to implement the multi-language translation function of mini programs in PHP

1. Determine the required language types: According to the needs, determine the language types and language texts that need to be provided.

2. Create a language text file: Create a PHP file for storing multi-language text, and save the text in different languages ​​into an array, as shown below:

$lang = array(
    '简体中文'=>array(
        'title'=>'欢迎使用微信小程序',
        'content'=>'小程序是基于微信生态的应用，具有轻便、快捷的特点。',
        'buttonText'=>'点击跳转'
    ),
    'English'=>array(
        'title'=>'Welcome to WeChat Mini Program',
        'content'=>'The mini-program is an application based on the WeChat ecosystem and has the characteristics of lightness and speed.',
        'buttonText'=>'Click to Jump'
    ),
    'Español'=>array(
        'title'=>'Bienvenido a la aplicación WeChat Mini',
        'content'=>'El mini-programa es una aplicación basada en el ecosistema WeChat y tiene las características de ligereza y velocidad.',
        'buttonText'=>'Clic para saltar'
    )
);

3. Create an API interface : Create an API interface for obtaining multi-language text, and return the corresponding language array according to the request parameters. Requests can be made using GET or POST, as shown below:

<?php
    header("Content-type: text/html; charset=utf-8");
    $lang = include 'lang.php';
    $language = isset($_POST['language']) ? $_POST['language'] : '简体中文';

    echo json_encode($lang[$language]);
?>

4. Front-end call API interface: In the mini program, obtain text information in the required language by calling the back-end API interface. You can use wx.request to make a request, as shown below:

wx.request({
  url: 'http://localhost/getLang.php', //链接到API接口地址
  data: {
    'language': 'English' //设置请求参数，获取英文文本
  },
  method: 'POST',
  success(res) {
    console.log(res.data)
  }
})

5. Display language text in the front-end page: After obtaining the language array returned by the back-end, display the text information in the array on the front-end page , realize the function of multi-language text display.

Page({
  data: {
    langText: {
      title: '',
      content: '',
      buttonText: ''
    }
  },
  onLoad: function () {
    var that = this;
    wx.request({
      url: 'http://localhost/getLang.php',
      data: {
        'language': 'English'
      },
      method: 'POST',
      success(res) {
        that.setData({
          langText: res.data
        })
      }
    })
  }
})

3. Precautions for implementing the multi-language translation function of mini programs in PHP

1. Language file storage method: When saving multi-language text, you can use PHP’s include and require functions to load it. Input the language file, or you can save the language file in JSON format and use PHP's json_decode function to parse it.

2. Front-end display mode: When displaying multi-language text, you can switch between different language texts through the WXML template library. You can also use the setData function to set the text information displayed on the page by yourself based on the returned language array.

3. Security of front-end and back-end communication: Since language text files may contain user-sensitive information, such as when interacting, interface access control should be strengthened, data encryption and anti-tampering measures should be added to ensure front-end and back-end communication security.

To sum up, to use PHP to implement the multi-language translation function of WeChat applet, you need to create language text files in the back-end service and create API interfaces for front-end calls. Multi-language can be achieved through front-end and back-end collaboration. Translation needs. In practical applications, attention should be paid to protecting user information security, strengthening data transmission encryption, and ensuring data privacy and security.

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