PHP | Detect User Browser Language

How to detect user browser language and how to use it in URL.
If you add this script above your file code.
Then url will be :

• www.domain.com/index.php?lang=en
• www.domain.com/index.php?lang=ar
• www.domain.com/index.php?lang=es
• www.domain.com/index.php?lang=fr
• www.domain.com/index.php?lang=hu
• www.domain.com/index.php?lang=ra

 Region wise. and you can use this to multilingual website.

---

 <?php  
 //Redirect by language  
 $lang = substr($_SERVER['HTTP_ACCEPT_LANGUAGE'], 0, 2);  
 if(!isset($_GET['lang']))  
 {  
      //Retrieve location, set time  
      if(!isset($lang))  
      {  
           header("location: ".$_SERVER['PHP_SELF']);  
           exit;  
      }  
      else  
      {  
           header("location: ".$_SERVER['PHP_SELF']."?lang=".$lang);  
           exit;  
      }  
 }  
 ?>