Automatically identify the browser language and switch between Chinese and English (php and Js versions)

 error_reporting(E_ALL ^ ​​E_NOTICE);
 // Analyze the attributes of HTTP_ACCEPT_LANGUAGE
 // Only the first language setting is taken here (other functions can be enhanced as needed)
 //Search and organize bbs.it -home.org
 preg_match('/^([a-z-]+)/i', $_SERVER['HTTP_ACCEPT_LANGUAGE'], $matches);
 $lang = $matches[1];
 switch ($lang) {
 case 'zh-cn' :
 header('Location: http://cn.jbxue.com/');
 break;
 case 'zh-tw' :
 header('Location: http://tw. jbxue.com/');
 break;
 case 'ko' :
 header('Location: http://ko.jbxue.com/');
 break;
 default:
 header('Location: http:/ /en.jbxue.com/');
 break;
 }
?>

2, JS-based method: