PHP implements multi-language website

With the development of globalization, multilingual websites have become an unavoidable trend. Whether it is a corporate website, e-commerce platform, media website or forum community, it needs to support multiple languages. This article will introduce how to use PHP to implement a multilingual website.

1. What is a multilingual website?

A multilingual website refers to a website that can use different languages ​​to present the same content. For example, an English website can be set to support Chinese so that visitors can choose to browse the website in Chinese. In a multilingual website, different translated versions of the same content are managed in the form of multilingual files.

2. How to implement multi-language websites in PHP

1. Define multi-language files

In PHP, arrays are often used to define multi-language files . For example, the English multi-language file en.php can be defined as follows:

<?php
$lang = array(
    'welcome' => 'Welcome to our website!',
    'about' => 'About us',
    'contact' => 'Contact us',
);

The Chinese multi-language file zh.php can be defined as follows:

<?php
$lang = array(
    'welcome' => '欢迎来到我们的网站！',
    'about' => '关于我们',
    'contact' => '联系我们',
);

2. Select multi-language according to the visitor's language File

In PHP, you can determine the visitor's language preference by parsing the Accept-Language field in the HTTP request header. For example:

function get_language() {
    if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
        $languages = explode(',', $_SERVER['HTTP_ACCEPT_LANGUAGE']);
        foreach ($languages as $lang) {
            $lang = str_replace('-', '_', strtolower(trim($lang)));
            if (file_exists("lang/$lang.php")) {
                return $lang;
            }
        }
    }
    return 'en';
}

This function will parse the Accept-Language field, then check whether there is a corresponding multi-language file (such as lang/en.php, lang/zh.php, etc.), and return the corresponding language selection.

3. Display multilingual content

In PHP, you can use the lang function to display multilingual content. For example:

function lang($key) {
    static $lang;
    if (!$lang) {
        $lang = include "lang/" . get_language() . ".php";
    }
    if (isset($lang[$key])) {
        return $lang[$key];
    }
    return $key;
}

This function will return the corresponding translation version based on the previously defined multi-language file. If the corresponding version is not found, the original text is returned.

4. Using multilingual content in pages

You can use multilingual content in HTML pages in the following ways:

<h1><?php echo lang('welcome'); ?></h1>
<p><?php echo lang('about'); ?></p>
<a href="contact.php"><?php echo lang('contact'); ?></a>

All in the page Text content can be rendered using the lang function to support multi-language websites.

3. Summary

It is not complicated to implement a multi-language website using PHP. You only need to follow the above three steps. By defining multilingual files, selecting multilingual files based on the visitor's language, and using multilingual content in pages, you can easily support multilingual websites and improve website usability and user experience.

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