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