KohanaPHP » Kohana v2.x

Hello.

I have interest in parse the HTTP_ACCEPT_LANGUAGE header sent by client. Kohana offers me a method located at Kohana class and called user_agent. If I use Kohana::user_agent('languages') in my code, it return me an array of ordered values sent by the client to server using the following code:

system/core/Kohana.php

$return = array();
if ( ! empty($_SERVER['HTTP_ACCEPT_LANGUAGE']))
{
  if (preg_match_all('/[-a-z]{2,}/', strtolower(trim($_SERVER['HTTP_ACCEPT_LANGUAGE'])), $matches))
  {
    // Found a result
    $return = $matchesr0;
  }
}

This code simply take the languages codes, even someone specify the q=0 directive which is specified in RFC 2616 (http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html).

I think that the code could be similar to:

$return = array();
if ( ! empty($_SERVER['HTTP_ACCEPT_LANGUAGE']))
{
        //¿contiene varias especificaciones (separadas por coma)?
    if(strpos($_SERVER['HTTP_ACCEPT_LANGUAGE'], ',') === false)
    {
        //sólo contiene 1 especificación
        $spec = array($_SERVER['HTTP_ACCEPT_LANGUAGE']);
    }
    else
    {
        //contiene 2 o mas
        $spec = explode(',', $_SERVER['HTTP_ACCEPT_LANGUAGE']);
    }

    //para cada especificacion...
    foreach($spec as $item)
    {
        //¿tiene qvalue?
        if(strpos($item, ';') !== false)
        {
            //si, tiene
            $a = explode(';', $item);
            $coding = trim($ar0);

            //parseamos para obtener el qvalue
            preg_match('/^q=([0-9.]+)$/', trim($ar1), $result);
            $qvalue = intval(floatval($resultr1) * 100);
        }
        else
        {
            //no, no tiene, se presupone que es 1
            $qvalue = 100;
            $coding = trim($item);
        }

        //añadimos los resultados a la lista final
        $return[$coding] = $qvalue;
    }

    //ordenamos la matriz en orden inverso
    arsort($return);
}

An alternative would be modify the Request_Core::parse_accept_header to allow the hability to specify the header to parse and use this to obtain a real array of accepted languages in user browser.