multilanguage site with sub folder - php

Question

Please help me with php file that must redirect to correct language.
the site architecture is
site.com/en
site.com/fr
my cod:
<?php
$sites = array(
"en" => "/en/index",
);
$lang = substr($_SERVER['HTTP_ACCEPT_LANGUAGE'], 0, 2);
if (!in_array($lang, array_keys($sites))){
$lang = 'en';
}
// перенаправление на субдомен
header('Location: ' . $sites[$lang]);
?>

Answer 1

You could to append the $_SERVER['PHP_SELF'] variable, that contains the path relative to the document root, to your language folder.
If your path were site.com/fr/file, this variable would contain /fr/file. When you remove the first part of this part, you get the 'language-independent' path of the called script, that you can append to the desired language directory.
If your path is as you described, you could try the following solution (untested!):
<?php
$sites = array(
"en" => "/en",
);
$lang = substr($_SERVER['HTTP_ACCEPT_LANGUAGE'], 0, 2);
if (!in_array($lang, array_keys($sites))){
$lang = 'en';
}
$path_to_script = substr($_SERVER['PHP_SELF'], 3);
header('Location: ' . $sites[$lang] . $path_to_script);
?>
EDIT: to clarify the approach:
If the site is site.com/fr/123/index.php, the variable $path_to_script will then contain /123/index.php, the script directory without the leading language dir.
You can then append this to the desired language dir and get the path you wanted: /en/123/index.php

Answer 2

/en/index should be /en/index.php except if you are using Apache's mod_rewrite (not by default). Please provide more details of what is not working so we can help you more.
EDIT:
Furthermore, you could give the user the option of choosing language as 'HTTP_ACCEPT_LANGUAGE' might not be set. In that case, the only choice would be English, which would limit your public.
Some people even recommend about geolocalization, but I find it good enough to add a little drop down menu with languages.