What best practices should be followed when handling language redirection based on browser settings in PHP?

When handling language redirection based on browser settings in PHP, it's important to first detect the user's preferred language using the `$_SERVER['HTTP_ACCEPT_LANGUAGE']` variable. Then, compare this language with the available languages on your website and redirect the user to the appropriate version. Finally, make sure to set a default language in case the user's preferred language is not available. 

$user_lang = substr($_SERVER['HTTP_ACCEPT_LANGUAGE'], 0, 2);
$available_languages = ['en', 'fr', 'es']; // List of available languages on your website

if(in_array($user_lang, $available_languages)) {
    header('Location: https://example.com/'.$user_lang.'/');
} else {
    header('Location: https://example.com/en/'); // Redirect to default language if user's preferred language is not available
}

Keywords

HTTP headers Accept-Language Locale Localization Multilingualism

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