With the continuous development of the Internet, more and more websites and applications need to support multi-language functions in order to better serve global users. In web development, ThinkPHP is a very excellent PHP framework. It has built-in multi-language support, allowing developers to easily implement multi-language applications. This article will introduce how to use the ThinkPHP6 framework to achieve multi-language functionality.

1. Multi-language configuration

In ThinkPHP6, to implement multi-language functionality, you need to create a new lang.php file in the config directory of the application to configure multi-language support. Multiple language packs can be configured in this file, and the default language and language variables can be set, as shown below:

<?php

return [
    'default_lang'  => 'zh-cn', // 默認語言
    'lang_detect_var'   => 'lang', // 語言檢測變量
    'lang_list' => ['zh-cn', 'en-us'], // 支持的語言列表

    'LANG_SWITCH_ON' => true, // 開啟語言包功能

    'phrase'    => ['hello' => '你好', 'world' => '世界'], // 語言變量
];

In the above language configuration, we set the default language to Chinese (zh-cn), supported The language list is Chinese and English, the language pack function is enabled, and two language variables hello and world are set. Among them, lang_detect_var is used to detect the GET parameter of the language. The default is lang, that is, add ?lang=en to the URL to switch the language.

2. Language pack file

Language pack file is a PHP file that stores language variables. It is created in the language pack directory corresponding to each language. For example, create a lang.php file in the lang/zh-cn directory to store Chinese language variables:

<?php

return [
    'hello' => '你好',
    'world' => '世界',
    'welcome'   => '歡迎',
];

Similarly, create a lang.php file in the lang/en-us directory to store English language variables:

<?php

return [
    'hello' => 'Hello',
    'world' => 'World',
    'welcome'   => 'Welcome',
];

In the above example, we stored three language variables, namely hello, world and welcome.

3. Language package call

In the application, we can use the method to obtain the language variables in the current language package. When using the method, you can set the second parameter to specify the language pack to be called. For example:

echo __('hello'); // 輸出當前語言包中的 hello 變量
echo __('hello', 'en-us'); // 輸出英文語言包中的 hello 變量

If a language variable does not exist, the __ method will return the name of the variable. If the value of the language variable is not set in the current language package, the framework will automatically query the corresponding value in the default language package. If there is no value for the variable in the default language package, the name of the variable will be returned.

4. Language package switching

In the application, we can use the method of setting language variables to switch multi-language functions. For example, in a controller, we can use the setLang method to set the language variable, as shown below:

public function setLang()
{
    $lang = input('param.lang');

    if (in_array($lang, config('lang_list'))) {
        cookie('think_var', $lang);
        $this->redirect('index/index');
    } else {
        $this->error('語言不存在');
    }
}

In the above code, we first get the lang parameter and determine whether its value is in the supported language list , if present, sets the language variable and redirects to the home page. If it does not exist, an error message is displayed.

5. Summary

This article introduces the method of using the ThinkPHP6 framework to achieve multi-language functions. With steps such as multi-language configuration, language pack files, and language pack calls, we can now easily add multi-language support to our applications. I hope this article can help developers who need to implement multi-language functions.

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