Config.php

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<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP 4.3.2 or newer
 *
 * @package             CodeIgniter
 * @author              ExpressionEngine Dev Team
 * @copyright   Copyright (c) 2006, EllisLab, Inc.
 * @license             http://codeigniter.com/user_guide/license.html
 * @link                http://codeigniter.com
 * @since               Version 1.0
 * @filesource
 */

// ------------------------------------------------------------------------

/**
 * CodeIgniter Config Class
 *
 * This class contains functions that enable config files to be managed
 *
 * @package             CodeIgniter
 * @subpackage  Libraries
 * @category    Libraries
 * @author              ExpressionEngine Dev Team
 * @link                http://codeigniter.com/user_guide/libraries/config.html
 */
class CI_Config {

        var $config = array();
        var $is_loaded = array();

        /**
         * Constructor
         *
         * Sets the $config data from the primary config.php file as a class variable
         *
         * @access   public
         * @param   string      the config file name
         * @param   boolean  if configuration values should be loaded into their own section
         * @param   boolean  true if errors should just return false, false if an error message should be displayed
         * @return  boolean  if the file was successfully loaded or not
         */
        function CI_Config()
        {
                $this->config =& get_config();
                log_message('debug', "Config Class Initialized");
        }       
        
        // --------------------------------------------------------------------

        /**
         * Load Config File
         *
         * @access      public
         * @param       string  the config file name
         * @return      boolean if the file was loaded correctly
         */     
        function load($file = '', $use_sections = FALSE, $fail_gracefully = FALSE)
        {
                $file = ($file == '') ? 'config' : str_replace(EXT, '', $file);
        
                if (in_array($file, $this->is_loaded, TRUE))
                {
                        return TRUE;
                }

                if ( ! file_exists(APPPATH.'config/'.$file.EXT))
                {
                        if ($fail_gracefully === TRUE)
                        {
                                return FALSE;
                        }
                        show_error('The configuration file '.$file.EXT.' does not exist.');
                }
        
                include(APPPATH.'config/'.$file.EXT);

                if ( ! isset($config) OR ! is_array($config))
                {
                        if ($fail_gracefully === TRUE)
                        {
                                return FALSE;
                        }
                        show_error('Your '.$file.EXT.' file does not appear to contain a valid configuration array.');
                }

                if ($use_sections === TRUE)
                {
                        if (isset($this->config[$file]))
                        {
                                $this->config[$file] = array_merge($this->config[$file], $config);
                        }
                        else
                        {
                                $this->config[$file] = $config;
                        }
                }
                else
                {
                        $this->config = array_merge($this->config, $config);
                }

                $this->is_loaded[] = $file;
                unset($config);

                log_message('debug', 'Config file loaded: config/'.$file.EXT);
                return TRUE;
        }
        
        // --------------------------------------------------------------------

        /**
         * Fetch a config file item
         *
         *
         * @access      public
         * @param       string  the config item name
         * @param       string  the index name
         * @param       bool
         * @return      string
         */
        function item($item, $index = '')
        {       
                if ($index == '')
                {       
                        if ( ! isset($this->config[$item]))
                        {
                                return FALSE;
                        }

                        $pref = $this->config[$item];
                }
                else
                {
                        if ( ! isset($this->config[$index]))
                        {
                                return FALSE;
                        }

                        if ( ! isset($this->config[$index][$item]))
                        {
                                return FALSE;
                        }

                        $pref = $this->config[$index][$item];
                }

                return $pref;
        }
        
        // --------------------------------------------------------------------

        /**
         * Fetch a config file item - adds slash after item
         *
         * The second parameter allows a slash to be added to the end of
         * the item, in the case of a path.
         *
         * @access      public
         * @param       string  the config item name
         * @param       bool
         * @return      string
         */
        function slash_item($item)
        {
                if ( ! isset($this->config[$item]))
                {
                        return FALSE;
                }

                $pref = $this->config[$item];

                if ($pref != '' && substr($pref, -1) != '/')
                {       
                        $pref .= '/';
                }

                return $pref;
        }
        
        // --------------------------------------------------------------------

        /**
         * Site URL
         *
         * @access      public
         * @param       string  the URI string
         * @return      string
         */
        function site_url($uri = '')
        {
                if (is_array($uri))
                {
                        $uri = implode('/', $uri);
                }

                if ($uri == '')
                {
                        return $this->slash_item('base_url').$this->item('index_page');
                }
                else
                {
                        $suffix = ($this->item('url_suffix') == FALSE) ? '' : $this->item('url_suffix');
                        return $this->slash_item('base_url').$this->slash_item('index_page').preg_replace("|^/*(.+?)/*$|", "\\1", $uri).$suffix;
                }
        }
        
        // --------------------------------------------------------------------

        /**
         * System URL
         *
         * @access      public
         * @return      string
         */
        function system_url()
        {
                $x = explode("/", preg_replace("|/*(.+?)/*$|", "\\1", BASEPATH));
                return $this->slash_item('base_url').end($x).'/';
        }
        
        // --------------------------------------------------------------------

        /**
         * Set a config file item
         *
         * @access      public
         * @param       string  the config item key
         * @param       string  the config item value
         * @return      void
         */
        function set_item($item, $value)
        {
                $this->config[$item] = $value;
        }

}

// END CI_Config class

/* End of file Config.php */
/* Location: ./system/libraries/Config.php */