How to use PHP functions to process multi-language websites-PHP Tutorial-php.cn

How to use PHP functions to process multi-language websites

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Release： 2023-06-16 08:26:01

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In today's Internet age, building a multilingual website is very common. In order to increase the audience of the website, many companies or individuals will choose to make the website into multi-language versions. In this case, how to deal with multilingual issues more efficiently has become a very important topic. In this article, we will focus on how to use PHP functions to process multilingual websites.

Understand the principles of multi-language websites

Before starting to introduce the PHP processing method, first understand the principles of multi-language websites. Generally speaking, multi-language websites will first select the corresponding language version according to the user's browser language preference, and then translate and display the content of the page. In this case, how to implement support for multiple language versions?

At this time, we will choose to put the language resources of the website in an independent language package, and use some identifiers to index resources in different language versions. This language pack is usually a specific file format, such as XML, JSON, etc. All strings that need to be translated will use this identifier to refer to the corresponding language resource.

For example, in the English version of the website, the string "about us" can be expressed as "$LANG['about_us']", and in the Chinese version of the website, the string "about us" can be expressed as " $LANG['about_us']", the language resource files corresponding to the two are:

//en.xml
<?xml version="1.0" encoding="utf-8"?>
<language>
    <string id="about_us">About Us</string>
</language>

//zh_CN.xml
<?xml version="1.0" encoding="utf-8"?>
<language>
    <string id="about_us">关于我们</string>
</language>

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Using PHP functions to process multi-language websites

With the above languages Parsing strategy, we can use PHP functions to process multi-language websites. Here are some commonly used PHP functions:

(1) simplexml_load_file(): used to parse XML files and convert them into SimpleXMLElement objects to facilitate parsing operations.

(2) json_decode(): Used to parse language resource files in json format into php objects or arrays to facilitate parsing operations.

(3)_(): used to obtain the translation string in the corresponding language resource file, generally used in template files, for example:

<p><?php echo _("about_us"); ?></p>

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This function will automatically match the language of the current user Set to select the corresponding language resource file and return the translation string of the corresponding identifier.

(4) eval() function: This function can execute PHP code in string form and can be used to dynamically generate multi-language translation functions or language resource files. However, because eval can easily cause security problems, you need to pay attention when using it.

Example code for implementing a multi-language website

The following is a simple code example for implementing a multi-language website:

<?php
    //获取当前用户的语言偏好设置
    $user_lang = substr($_SERVER['HTTP_ACCEPT_LANGUAGE'], 0, 2);
    //定义语言文件路径
    $lang_file = './lang/'.$user_lang.'.json';
    //解析语言文件
    if(!file_exists($lang_file)){
        $lang_file = './lang/en.json';//找不到则默认用英文
    }
    $lang_json = file_get_contents($lang_file);
    $lang = json_decode($lang_json, true);

    //定义翻译函数，用于获取对应的翻译串
    function __($id){
        global $lang;
        return isset($lang[$id]) ? $lang[$id] : $id;
    }
?>

<!--html代码-->
<html>
    <head>
        <title><?php echo __('website_title'); ?></title>
    </head>
    <body>
        <h1><?php echo __('welcome_to_website'); ?></h1>
        <p><?php echo __('about_us'); ?></p>
        <p><?php echo __('contact_us'); ?></p>
    </body>
</html>

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In this example, We first select the corresponding language file according to the user's language preference settings and parse the language resource file in json format. Then define a translation function __($id) to obtain the corresponding translation string. Finally, we use __('string identifier') in the html code for multi-language translation.

Through this design, we can easily implement a multi-language website, reduce the complexity of page language switching, and make page development easier and more convenient. Of course, when implementing a multilingual website, you also need to pay attention to some details, such as language resource management, language package maintenance, etc. But in general, this method can quickly and efficiently build a multi-language website, which brings great convenience to our page development.

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