What are some best practices for creating a multilingual website in PHP?

When creating a multilingual website in PHP, it is important to use language files to store all text content in different languages. This allows for easy translation and maintenance of the website. Additionally, setting the language based on user preferences or browser settings can enhance the user experience. Finally, using PHP functions like `gettext()` or creating custom functions to retrieve translated text can streamline the process of displaying content in multiple languages.

// Example of using language files for multilingual website

// Load language file based on user preference or browser settings
$language = isset($_GET['lang']) ? $_GET['lang'] : 'en';
include_once "languages/{$language}.php";

// Function to retrieve translated text
function translate($key) {
    global $lang;
    return isset($lang[$key]) ? $lang[$key] : $key;
}

// Usage example
echo translate('welcome_message');