1 <?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
5 * An open source application development framework for PHP 5.1.6 or newer
8 * @author ExpressionEngine Dev Team
9 * @copyright Copyright (c) 2008 - 2011, EllisLab, Inc.
10 * @license http://codeigniter.com/user_guide/license.html
11 * @link http://codeigniter.com
16 // ------------------------------------------------------------------------
19 * Initialize the database
22 * @author ExpressionEngine Dev Team
23 * @link http://codeigniter.com/user_guide/database/
25 function &DB($params = '', $active_record_override = NULL)
27 // Load the DB config file if a DSN string wasn't passed
28 if (is_string($params) AND strpos($params, '://') === FALSE)
30 // Is the config file in the environment folder?
31 if ( ! defined('ENVIRONMENT') OR ! file_exists($file_path = APPPATH.'config/'.ENVIRONMENT.'/database'.EXT))
33 if ( ! file_exists($file_path = APPPATH.'config/database'.EXT))
35 show_error('The configuration file database'.EXT.' does not exist.');
41 if ( ! isset($db) OR count($db) == 0)
43 show_error('No database connection settings were found in the database config file.');
48 $active_group = $params;
51 if ( ! isset($active_group) OR ! isset($db[$active_group]))
53 show_error('You have specified an invalid database connection group.');
56 $params = $db[$active_group];
58 elseif (is_string($params))
61 /* parse the URL from the DSN string
62 * Database settings can be passed as discreet
63 * parameters or as a data source name in the first
64 * parameter. DSNs must have this prototype:
65 * $dsn = 'driver://username:password@hostname/database';
68 if (($dns = @parse_url($params)) === FALSE)
70 show_error('Invalid DB Connection String');
74 'dbdriver' => $dns['scheme'],
75 'hostname' => (isset($dns['host'])) ? rawurldecode($dns['host']) : '',
76 'username' => (isset($dns['user'])) ? rawurldecode($dns['user']) : '',
77 'password' => (isset($dns['pass'])) ? rawurldecode($dns['pass']) : '',
78 'database' => (isset($dns['path'])) ? rawurldecode(substr($dns['path'], 1)) : ''
81 // were additional config items set?
82 if (isset($dns['query']))
84 parse_str($dns['query'], $extra);
86 foreach ($extra as $key => $val)
89 if (strtoupper($val) == "TRUE")
93 elseif (strtoupper($val) == "FALSE")
103 // No DB specified yet? Beat them senseless...
104 if ( ! isset($params['dbdriver']) OR $params['dbdriver'] == '')
106 show_error('You have not selected a database type to connect to.');
109 // Load the DB classes. Note: Since the active record class is optional
110 // we need to dynamically create a class that extends proper parent class
111 // based on whether we're using the active record class or not.
112 // Kudos to Paul for discovering this clever use of eval()
114 if ($active_record_override !== NULL)
116 $active_record = $active_record_override;
119 require_once(BASEPATH.'database/DB_driver'.EXT);
121 if ( ! isset($active_record) OR $active_record == TRUE)
123 require_once(BASEPATH.'database/DB_active_rec'.EXT);
125 if ( ! class_exists('CI_DB'))
127 eval('class CI_DB extends CI_DB_active_record { }');
132 if ( ! class_exists('CI_DB'))
134 eval('class CI_DB extends CI_DB_driver { }');
138 require_once(BASEPATH.'database/drivers/'.$params['dbdriver'].'/'.$params['dbdriver'].'_driver'.EXT);
140 // Instantiate the DB adapter
141 $driver = 'CI_DB_'.$params['dbdriver'].'_driver';
142 $DB = new $driver($params);
144 if ($DB->autoinit == TRUE)
149 if (isset($params['stricton']) && $params['stricton'] == TRUE)
151 $DB->query('SET SESSION sql_mode="STRICT_ALL_TABLES"');
159 /* End of file DB.php */
160 /* Location: ./system/database/DB.php */