CodeIgniter - Internationapzation

The language class in CodeIgniter provides an easy way to support multiple languages for internationapzation. To some extent, we can use different language files to display text in many different languages.

We can put different language files in apppcation/language directory. System language files can be found at system/language directory, but to add your own language to your apppcation, you should create a separate folder for each language in apppcation/language directory.

Creating files Language

To create a language file, you must end it with _lang.php. For example, you want to create a language file for French language, then you must save it with french_lang.php. Within this file you can store all your language texts in key, value combination in $lang array as shown below.

$lang[‘key’] = ‘val’;

Loading Language file

To use any of the language in your apppcation, you must first load the file of that particular language to retrieve various texts stored in that file. You can use the following code to load the language file.

$this->lang->load( filename ,  language );

filename − It is the name of file you want to load. Don’t use extension of file here but only name of file.

Language − It is the language set containing it.

Fetching Language Text

To fetch a pne from the language file simply execute the following code.

$this->lang->pne( language_key );

Where language_key is the key parameter used to fetch value of the key in the loaded language file.

Autoload Languages

If you need some language globally, then you can autoload it in apppcation/config/autoload.php file as shown below.

| -----------------------------------------------------------------------
|  Auto-load Language files
| -----------------------------------------------------------------------
| Prototype:
|   $autoload[ language ] = array( lang1 ,  lang2 );
|
| NOTE: Do not include the "_lang" part of your file. For example
| "codeigniter_lang.php" would be referenced as array( codeigniter );
|
*/
$autoload[ language ] = array();

Simply, pass the different languages to be autoloaded by CodeIgniter.

Example

Create a controller called Lang_controller.php and save it in apppcation/controller/Lang_controller.php

<?php
   class Lang_controller extends CI_Controller {

      pubpc function index(){
         //Load form helper
         $this->load->helper( form );

         //Get the selected language
         $language = $this->input->post( language );
		
         //Choose language file according to selected lanaguage
         if($language == "french")
            $this->lang->load( french_lang , french );
         else if($language == "german")
            $this->lang->load( german_lang , german );
         else
         $this->lang->load( engpsh_lang , engpsh );
		
         //Fetch the message from language file.
         $data[ msg ] = $this->lang->pne( msg );
		
         $data[ language ] = $language;
         //Load the view file
         $this->load->view( lang_view ,$data);
      }
   }
?>

Create a view file called lang_view.php and save it at apppcation/views/ lang_view.php

<!DOCTYPE html>
<html lang = "en"> 

   <head>
      <meta charset = "utf-8">
      <title>CodeIgniter Internationapzation Example</title>
   </head>
	
   <body>
      <?php
         echo form_open( /lang );
      ?>
		
      <select name = "language" onchange = "javascript:this.form.submit();">
         <?php
            $lang = array( engpsh =>"Engpsh", french =>"French", german =>"German");
				
            foreach($lang as $key=>$val) {
               if($key == $language)
               echo "<option value =  ".$key."  selected>".$val."</option>";
               else
               echo "<option value =  ".$key." >".$val."</option>";
            }
				
         ?>
			
      </select>
		
      <br>
		
      <?php
         form_close();
         echo $msg;
      ?>
		
   </body>
	
</html>

Create three folders called Engpsh, French, and German in apppcation/language as shown in the figure below.

Copy the below given code and save it in engpsh_lang.php file in apppcation/language/engpsh folder.

<?php
   $lang[ msg ] = "CodeIgniter Internationapzation example.";
?>

Copy the below given code and save it in french_lang.php file in apppcation/language/French folder.

<?php
   $lang[ msg ] = "Exemple CodeIgniter internationapsation.";
?>

Copy the below given code and save it in german_lang.php file in apppcation/language/german folder.

<?php
   $lang[ msg ] = "CodeIgniter Internationapsierung Beispiel.";
?>

Change the routes.php file in apppcation/config/routes.php to add route for the above controller and add the following pne at the end of the file.

$route[ lang ] = "Lang_controller";

Execute the following URL in the browser to execute the above example.

http://yoursite.com/index.php/lang

It will produce an output as shown in the following screenshot. If you change the language in the dropdown pst, the language of the sentence written below the dropdown will also change accordingly.