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   1  <?php
   2  
   3  /**
   4   * sfHTTPNegotiator class file.
   5   *
   6   * This program is free software; you can redistribute it and/or modify
   7   * it under the terms of the BSD License.
   8   *
   9   * Copyright(c) 2004 by Qiang Xue. All rights reserved.
  10   *
  11   * To contact the author write to {@link mailto:qiang.xue@gmail.com Qiang Xue}
  12   * The latest version of PRADO can be obtained from:
  13   * {@link http://prado.sourceforge.net/}
  14   *
  15   * @author     Wei Zhuo <weizhuo[at]gmail[dot]com>
  16   * @version    $Id: sfHTTPNegotiator.class.php 835 2006-02-15 20:57:57Z fabien $
  17   * @package    symfony
  18   * @subpackage i18n
  19   */
  20  
  21  /**
  22   * sfHTTPNegotiator class.
  23   * 
  24   * Get the language and charset information from the client browser.
  25   *
  26   * @author Xiang Wei Zhuo <weizhuo[at]gmail[dot]com>
  27   * @version v1.0, last update on Fri Dec 24 16:01:35 EST 2004
  28   * @package System.I18N.core
  29   */
  30  class sfHTTPNegotiator
  31  {
  32    /**
  33     * A list of languages accepted by the browser.
  34     * @var array 
  35     */
  36    protected $languages;
  37  
  38    /**
  39     * A list of charsets accepted by the browser
  40     * @var array 
  41     */
  42    protected $charsets;
  43  
  44    /**
  45     * Get a list of languages acceptable by the client browser
  46     * @return array languages ordered in the user browser preferences. 
  47     */
  48    function getLanguages()
  49    {
  50      if(!is_null($this->languages))
  51        return $this->languages;
  52  
  53      $this->languages = array();
  54  
  55      if (!isset($_SERVER['HTTP_ACCEPT_LANGUAGE']))
  56              return $this->languages;
  57  
  58      //$basedir = sfCultureInfo::dataDir();
  59      //$ext = sfCultureInfo::fileExt();
  60  
  61      foreach(explode(',', $_SERVER['HTTP_ACCEPT_LANGUAGE']) as $lang) 
  62      {
  63              // Cut off any q-value that might come after a semi-colon
  64              if ($pos = strpos($lang, ';'))
  65                  $lang = trim(substr($lang, 0, $pos));
  66  
  67        if (strstr($lang, '-')) 
  68        {
  69          $codes = explode('-',$lang);
  70          if($codes[0] == 'i')
  71          {
  72                      // Language not listed in ISO 639 that are not variants
  73                      // of any listed language, which can be registerd with the
  74                      // i-prefix, such as i-cherokee
  75            if(count($codes)>1)
  76              $lang = $codes[1];
  77          }
  78          else
  79          {
  80            for($i = 0; $i<count($codes); $i++)
  81            {
  82              if($i == 0)
  83                $lang = strtolower($codes[0]);
  84              else
  85                $lang .= '_'.strtoupper($codes[$i]);
  86            }
  87          }
  88              }
  89  
  90        if(sfCultureInfo::validCulture($lang))
  91          $this->languages[] = $lang;
  92          }
  93      
  94      return $this->languages;
  95    }
  96  
  97    /**
  98     * Get a list of charsets acceptable by the client browser.
  99     * @return array list of charsets in preferable order. 
 100     */
 101    function getCharsets()
 102    {
 103          if(!is_null($this->charsets))
 104        return $this->charsets;
 105  
 106      $this->charsets = array();
 107  
 108      if (!isset($_SERVER['HTTP_ACCEPT_CHARSET']))
 109              return $this->charsets;
 110  
 111      foreach (explode(',', $_SERVER['HTTP_ACCEPT_CHARSET']) as $charset) 
 112      {
 113              if (!empty($charset)) 
 114                  $this->charsets[] = preg_replace('/;.*/', '', $charset);
 115          }
 116  
 117      return $this->charsets;
 118    }
 119  }
 120  
 121  ?>