DALLASCAO.COM » codes http://dallascao.com/en Site of Dallas Cao, English to Chinese translator Mon, 09 Apr 2012 09:52:51 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 Use cookies to remember the language version users visited last time (php code) http://dallascao.com/en/use-cookies-to-remember/ http://dallascao.com/en/use-cookies-to-remember/#comments Thu, 30 Jul 2009 17:56:59 +0000 Dallas http://dallascao.com/en/?p=159 This site is bilingual. http://dallascao.com/cn/ is the Chinese version and http://dallscao.com/en/ is the English version. When you visit http://dallascao.com/, you are directed to either /cn/ or /en/ according to the default language of your browser or the version you visited last time. The site uses cookies to remember the version you visited last time and direct you to that version when you visit again. If it is the first time to visit, you will open the version that matches your browser language.

To do this, you need to edit the header.php of the English version under the /en/ folder and add the following code before the tag:

<!--set permanent cookie -->
<?php 
setcookie("lang", "en", time()+94608000, "/", ".dallascao.com");
?>

This code writes a variable “lang” on your computer and assigns a value “en”. 94608000 is the expiration time (3 years). “/” and “.dallascao.com” means it works from the root directory of dallascao.com and its subdomains. Inserting this code into header.php means that when you visit any page of the English version, your visit will be remembered.

Likewise, you need to insert the following code into the header.php of the Chinese version.

<!--set permanent cookie -->
<?php 
setcookie("lang", "cn", time()+94608000, "/", ".dallascao.com");
?>

It means when you visit the Chinese version, the variable “lang” will be assigned the value of “cn”.

At last, Create an index.php at the root containing the following code.

<?php $lang=$_COOKIE["lang"];
switch ($lang) {
 
case 'cn':
header('Location:  http://dallascao.com/cn');
break;
 
case 'en':
header('Location:  http://dallascao.com/en');
break;
#Get the default language of the browser if no cookies are found.
default:
	$lang = getDefaultLanguage(); 
	switch ($lang) { 
       case 'zh-cn' : 
               header('Location:  http://dallascao.com/cn'); 
               break; 
       default: 
	          header('Location: http://dallascao.com/en'); 
              break; 
		} 
break;
}
?>
 
 
<?php
 
 
 
#########################################################
# Copyright ? 2008 Darrin Yeager                        #
# http://www.dyeager.org/                               #
# Licensed under BSD license.                           #
#   http://www.dyeager.org/downloads/license-bsd.php    #
#########################################################

function getDefaultLanguage() {
   if (isset($_SERVER["HTTP_ACCEPT_LANGUAGE"]))
      return parseDefaultLanguage($_SERVER["HTTP_ACCEPT_LANGUAGE"]);
   else
      return parseDefaultLanguage(NULL);
   }
 
function parseDefaultLanguage($http_accept, $deflang = "en") {
   if(isset($http_accept) && strlen($http_accept) > 1)  {
      # Split possible languages into array
      $x = explode(",",$http_accept);
      foreach ($x as $val) {
         #check for q-value and create associative array. No q-value means 1 by rule
         if(preg_match("/(.*);q=([0-1]{0,1}\.\d{0,4})/i",$val,$matches))
            $lang[$matches[1]] = (float)$matches[2];
         else
            $lang[$val] = 1.0;
      }
 
      #return default language (highest q-value)
      $qval = 0.0;
      foreach ($lang as $key => $value) {
         if ($value > $qval) {
            $qval = (float)$value;
            $deflang = $key;
         }
      }
   }
   return strtolower($deflang);
}
 
 
?>

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]]> http://dallascao.com/en/use-cookies-to-remember/feed/ 0 The context sensitive Language Versions link http://dallascao.com/en/the-context-sensitive-language-versions-link/ http://dallascao.com/en/the-context-sensitive-language-versions-link/#comments Mon, 27 Jul 2009 15:39:21 +0000 Dallas http://dallascao.com/en/?p=127 Most bilingual sites only have a fixed link to the other language version. Wherever you are on one language version of a site, clicking on the Language Version link always takes you to the home page of the other version of the site. But I want my visitors get the exact page they are viewing written in the other language. For example, if my visitor is visiting

http://dallascao.com/en/2009/07/the-context-sensitive-language-versions-link/

by clicking “中文” at the bottom, he is taken to

http://dallascao.com/cn/2009/07/the-context-sensitive-language-versions-link/

So it involves replacing the “/en/” the URL of the current page with “/cn/”.

The following php code gives out wrong results:

<?php $url_old = "http://".$_SERVER ['HTTP_HOST'].$_SERVER['PHP_SELF']; ?>
<?php $url_new=str_replace("en","cn",$url_old); ?>   
<a href=<?php echo $url_new; ?>Chinese</a>

Whichever page you are visiting, $url_old always gives the home URL “/en/index.php”. This is because I turned Permalinks on and the URL is rewritten. The URL rewritting takes place after the execution of PHP codes on the server side, and therefore the php string “$url_old” cannot get the actual URL as it is rewritten afterwards. The following java script can get the right current URL as java script runs on the client’s computer:

<script>
var s=window.location.href
r=s.replace (/en/, "cn");
document.write ("<li><a title='English verion of this page' href="+r+">Chinese</a></li>")
</script>

More information:

java replace () method

]]> http://dallascao.com/en/the-context-sensitive-language-versions-link/feed/ 0