<?php
$languages = explode(',', $_SERVER['HTTP_ACCEPT_LANGUAGE']);
$languages = array_reverse($languages);
 
$result = '';
 
foreach ($languages as $language) {
  if (preg_match('/^ja/i', $language)) {
    $result = 'Japanese';
  } else {
    $result = 'English';
  }
}
if ($result == 'Japanese') {
    header("Location: /ja/");
    exit;
}elseif ($result == 'English') {
    header("Location: /en/");
    exit;
}else {
  $result = 'Japanese';
    header("Location: /ja/");
    exit;
}
 
/*if(is_home()){
$lang = $_GET["lang"];
if(!$lang&&$result=='English'){
    header("Location: /english?lang=en");
}
}*/