opensourcepos/application/core/MY_Lang.php

<?php if (!defined('BASEPATH')) exit('No direct script access allowed');

class MY_Lang extends CI_Lang
{
    public function switch_to($idiom)
    {
        $CI =& get_instance();
        if(is_string($idiom))
        {
            $CI->config->set_item('language', $idiom);
            $loaded = $this->is_loaded;
            $this->is_loaded = array();

            foreach($loaded as $file)
            {
                $filename = strtr($file, '', '_lang.php');
                $this->load($filename, 'english');
                $array = $this->load($filename, $idiom, TRUE);
                foreach($array as $lang_key => $lang_value) {
                    if ($lang_value != '') {
                        $this->language[$lang_key] = $lang_value;
                    }
                }
            }
        }
    }
    
	/**
     * Fetch a single line of text from the language array. Takes variable number
     * of arguments and supports wildcards in the form of '%1', '%2', etc.
     * Overloaded function.
     *
     * @access public
     * @return mixed false if not found or the language string
     */
	public function line($line = '', $log_errors = TRUE)
    {
        //get the arguments passed to the function
        $args = func_get_args();
        
        //count the number of arguments
        $c = count($args);
        
        //if one or more arguments, perform the necessary processing
        if($c)
        {
            //first argument should be the actual language line key
            //so remove it from the array (pop from front)
            $line = array_shift($args);
            
            //check to make sure the key is valid and load the line
            if($line == '')
            {
            	$line = FALSE;
            }
            else 
            {
            	if(isset($this->language[$line]) && $this->language[$line] != '')
            	{
            		$line = $this->language[$line];
            		//if the line exists and more function arguments remain
            		//perform wildcard replacements
            		if($args)
            		{
            			$i = 1;
            			foreach($args as $arg)
            			{
            				$line = preg_replace('/\%'.$i.'/', $arg, $line);
            				++$i;
            			}
            		}
            	}
            	else
            	{
            		// just return label name (with TBD)
            		$line = $this->line_tbd($line);
            		log_message('error', 'Could not find the language line "'.$line.'"');
            	}
            }
        }
        else
        {
            //if no arguments given, no language line available
            $line = FALSE;
        }
        
        return $line;
    }
    
    public function line_tbd($line = '')
    {
    	return $line . ' (TBD)';
    }
}

?>