1 files changed, 29 insertions, 21 deletions

diff --git a/system/database/DB.php b/system/database/DB.php
index 96e495515..00d14b43e 100755
--- a/system/database/DB.php
+++ b/system/database/DB.php
@@ -32,9 +32,9 @@
  * @author		EllisLab Dev Team
  * @link		http://codeigniter.com/user_guide/database/
  * @param 	string
- * @param 	bool	Determines if active record should be used or not
+ * @param 	bool	Determines if query builder should be used or not
  */
-function &DB($params = '', $active_record_override = NULL)
+function &DB($params = '', $query_builder_override = NULL)
 {
 	// Load the DB config file if a DSN string wasn't passed
 	if (is_string($params) && strpos($params, '://') === FALSE)
@@ -53,7 +53,7 @@ function &DB($params = '', $active_record_override = NULL)
 			show_error('No database connection settings were found in the database config file.');
 		}
 
-		if ($params != '')
+		if ($params !== '')
 		{
 			$active_group = $params;
 		}
@@ -92,16 +92,12 @@ function &DB($params = '', $active_record_override = NULL)
 		if (isset($dsn['query']))
 		{
 			parse_str($dsn['query'], $extra);
+
 			foreach ($extra as $key => $val)
 			{
-				// booleans please
-				if (strtoupper($val) === 'TRUE')
-				{
-					$val = TRUE;
-				}
-				elseif (strtoupper($val) === 'FALSE')
+				if (is_string($val) && in_array(strtoupper($val), array('TRUE', 'FALSE', 'NULL')))
 				{
-					$val = FALSE;
+					$val = var_export($val);
 				}
 
 				$params[$key] = $val;
@@ -110,27 +106,34 @@ function &DB($params = '', $active_record_override = NULL)
 	}
 
 	// No DB specified yet? Beat them senseless...
-	if ( ! isset($params['dbdriver']) OR $params['dbdriver'] == '')
+	if (empty($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
+	// Load the DB classes. Note: Since the query builder 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.
-	if ($active_record_override !== NULL)
+	// based on whether we're using the query builder class or not.
+	if ($query_builder_override !== NULL)
 	{
-		$active_record = $active_record_override;
+		$query_builder = $query_builder_override;
+	}
+	// Backwards compatibility work-around for keeping the
+	// $active_record config variable working. Should be
+	// removed in v3.1
+	elseif ( ! isset($query_builder) && isset($active_record))
+	{
+		$query_builder = $active_record;
 	}
 
 	require_once(BASEPATH.'database/DB_driver.php');
 
-	if ( ! isset($active_record) OR $active_record == TRUE)
+	if ( ! isset($query_builder) OR $query_builder === TRUE)
 	{
-		require_once(BASEPATH.'database/DB_active_rec.php');
+		require_once(BASEPATH.'database/DB_query_builder.php');
 		if ( ! class_exists('CI_DB'))
 		{
-			class CI_DB extends CI_DB_active_record { }
+			class CI_DB extends CI_DB_query_builder { }
 		}
 	}
 	elseif ( ! class_exists('CI_DB'))
@@ -138,18 +141,23 @@ function &DB($params = '', $active_record_override = NULL)
 		class CI_DB extends CI_DB_driver { }
 	}
 
-	require_once(BASEPATH.'database/drivers/'.$params['dbdriver'].'/'.$params['dbdriver'].'_driver.php');
+	// Load the DB driver
+	$driver_file = BASEPATH.'database/drivers/'.$params['dbdriver'].'/'.$params['dbdriver'].'_driver.php';
+
+	if ( ! file_exists($driver_file)) show_error('Invalid DB driver');
+
+	require_once($driver_file);
 
 	// Instantiate the DB adapter
 	$driver = 'CI_DB_'.$params['dbdriver'].'_driver';
 	$DB = new $driver($params);
 
-	if ($DB->autoinit == TRUE)
+	if ($DB->autoinit === TRUE)
 	{
 		$DB->initialize();
 	}
 
-	if (isset($params['stricton']) && $params['stricton'] == TRUE)
+	if ( ! empty($params['stricton']))
 	{
 		$DB->query('SET SESSION sql_mode="STRICT_ALL_TABLES"');
 	}