CodeIgniter installed

[living-lab-site.git] / system / database / DB.php

diff --git a/system/database/DB.php b/system/database/DB.php
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+++ b/system/database/DB.php
@@ -0,0 +1,160 @@
+<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 5.1.6 or newer
+ *
+ * @package            CodeIgniter
+ * @author             ExpressionEngine Dev Team
+ * @copyright  Copyright (c) 2008 - 2011, 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 = '', $active_record_override = NULL)
+{
+       // Load the DB config file if a DSN string wasn't passed
+       if (is_string($params) AND strpos($params, '://') === FALSE)
+       {
+               // Is the config file in the environment folder?
+               if ( ! defined('ENVIRONMENT') OR ! file_exists($file_path = APPPATH.'config/'.ENVIRONMENT.'/database'.EXT))
+               {
+                       if ( ! file_exists($file_path = APPPATH.'config/database'.EXT))
+                       {
+                               show_error('The configuration file database'.EXT.' does not exist.');
+                       }
+               }
+               
+               include($file_path);
+
+               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($dns['path'], 1)) : ''
+                                               );
+
+               // were additional config items set?
+               if (isset($dns['query']))
+               {
+                       parse_str($dns['query'], $extra);
+
+                       foreach ($extra as $key => $val)
+                       {
+                               // booleans please
+                               if (strtoupper($val) == "TRUE")
+                               {
+                                       $val = TRUE;
+                               }
+                               elseif (strtoupper($val) == "FALSE")
+                               {
+                                       $val = FALSE;
+                               }
+
+                               $params[$key] = $val;
+                       }
+               }
+       }
+
+       // No DB specified yet?  Beat them senseless...
+       if ( ! isset($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 !== NULL)
+       {
+               $active_record = $active_record_override;
+       }
+
+       require_once(BASEPATH.'database/DB_driver'.EXT);
+
+       if ( ! isset($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)
+       {
+               $DB->initialize();
+       }
+
+       if (isset($params['stricton']) && $params['stricton'] == TRUE)
+       {
+               $DB->query('SET SESSION sql_mode="STRICT_ALL_TABLES"');
+       }
+
+       return $DB;
+}
+
+
+
+/* End of file DB.php */
+/* Location: ./system/database/DB.php */
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