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<?php
/**
* HTTPNegotiator class file.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the BSD License.
*
* Copyright(c) 2004 by Qiang Xue. All rights reserved.
*
* To contact the author write to {@link mailto:qiang.xue@gmail.com Qiang Xue}
* The latest version of PRADO can be obtained from:
* {@link http://prado.sourceforge.net/}
*
* @author Wei Zhuo <weizhuo[at]gmail[dot]com>
* @version $Revision: 1.2 $ $Date: 2005/01/05 03:15:14 $
* @package System.I18N.core
*/
/**
* Include the CultureInfo class.
*/
require_once(dirname(__FILE__).'/CultureInfo.php');
/**
* HTTPNegotiator class.
*
* Get the language and charset information from the client browser.
*
* @author Xiang Wei Zhuo <weizhuo[at]gmail[dot]com>
* @version v1.0, last update on Fri Dec 24 16:01:35 EST 2004
* @package System.I18N.core
*/
class HTTPNegotiator
{
/**
* A list of languages accepted by the browser.
* @var array
*/
protected $languages;
/**
* A list of charsets accepted by the browser
* @var array
*/
protected $charsets;
/**
* Get a list of languages acceptable by the client browser
* @return array languages ordered in the user browser preferences.
*/
function getLanguages()
{
if($this->languages !== null) {
return $this->languages;
}
$this->languages = array();
if (!isset($_SERVER['HTTP_ACCEPT_LANGUAGE']))
return $this->languages;
//$basedir = CultureInfo::dataDir();
//$ext = CultureInfo::fileExt();
$info = new CultureInfo();
foreach(explode(',', $_SERVER['HTTP_ACCEPT_LANGUAGE']) as $lang)
{
// Cut off any q-value that might come after a semi-colon
if ($pos = strpos($lang, ';'))
$lang = trim(substr($lang, 0, $pos));
if (strstr($lang, '-'))
{
$codes = explode('-',$lang);
if($codes[0] == 'i')
{
// Language not listed in ISO 639 that are not variants
// of any listed language, which can be registerd with the
// i-prefix, such as i-cherokee
if(count($codes)>1)
$lang = $codes[1];
}
else
{
for($i = 0, $k = count($codes); $i<$k; ++$i)
{
if($i == 0)
$lang = strtolower($codes[0]);
else
$lang .= '_'.strtoupper($codes[$i]);
}
}
}
if($info->validCulture($lang))
$this->languages[] = $lang;
}
return $this->languages;
}
/**
* Get a list of charsets acceptable by the client browser.
* @return array list of charsets in preferable order.
*/
function getCharsets()
{
if($this->charsets !== null) {
return $this->charsets;
}
$this->charsets = array();
if (!isset($_SERVER['HTTP_ACCEPT_CHARSET']))
return $this->charsets;
foreach (explode(',', $_SERVER['HTTP_ACCEPT_CHARSET']) as $charset)
{
if (!empty($charset))
$this->charsets[] = preg_replace('/;.*/', '', $charset);
}
return $this->charsets;
}
}
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