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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
*/
// ------------------------------------------------------------------------
/**
* Initialize the database
*
* @category Database
* @author ExpressionEngine Dev Team
* @link http://codeigniter.com/user_guide/database/
*/
function &DB($params = '', $active_record_override = FALSE)
{
// Load the DB config file if a DSN string wasn't passed
if (is_string($params) AND strpos($params, '://') === FALSE)
{
include(APPPATH.'config/database'.EXT);
if (! isset($db) OR count($db) == 0)
{
show_error('No database connection settings were found in the database config file.');
}
if ($params != '')
{
$active_group = $params;
}
if (! isset($active_group) OR ! isset($db[$active_group]))
{
show_error('You have specified an invalid database connection group.');
}
$params = $db[$active_group];
}
elseif (is_string($params))
{
/* parse the URL from the DSN string
* Database settings can be passed as discreet
* parameters or as a data source name in the first
* parameter. DSNs must have this prototype:
* $dsn = 'driver://username:password@hostname/database';
*/
if (($dns = @parse_url($params)) === FALSE)
{
show_error('Invalid DB Connection String');
}
$params = array(
'dbdriver' => $dns['scheme'],
'hostname' => (isset($dns['host'])) ? rawurldecode($dns['host']) : '',
'username' => (isset($dns['user'])) ? rawurldecode($dns['user']) : '',
'password' => (isset($dns['pass'])) ? rawurldecode($dns['pass']) : '',
'database' => (isset($dns['path'])) ? rawurldecode(substr($dns['host'], 1)) : ''
);
}
// No DB specified yet? Beat them senseless...
if (! isset($params['dbdriver']) OR $params['dbdriver'] == '')
{
show_error('You have not selected a database type to connect to.');
}
// Load the DB classes. Note: Since the active record class is optional
// we need to dynamically create a class that extends proper parent class
// based on whether we're using the active record class or not.
// Kudos to Paul for discovering this clever use of eval()
if ($active_record_override == TRUE)
{
$active_record = TRUE;
}
require_once(BASEPATH.'database/DB_driver'.EXT);
if (! isset($active_record) OR $active_record == TRUE)
{
require_once(BASEPATH.'database/DB_active_rec'.EXT);
if (! class_exists('CI_DB'))
{
eval('class CI_DB extends CI_DB_active_record { }');
}
}
else
{
if (! class_exists('CI_DB'))
{
eval('class CI_DB extends CI_DB_driver { }');
}
}
require_once(BASEPATH.'database/drivers/'.$params['dbdriver'].'/'.$params['dbdriver'].'_driver'.EXT);
// Instantiate the DB adapter
$driver = 'CI_DB_'.$params['dbdriver'].'_driver';
$DB =& new $driver($params);
if ($DB->autoinit == TRUE)
{
$DB->initialize();
}
return $DB;
}
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