165 行
4 KiB
PHP
165 行
4 KiB
PHP
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<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
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/**
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* CodeIgniter
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*
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* An open source application development framework for PHP 5.1.6 or newer
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*
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* @package CodeIgniter
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* @author ExpressionEngine Dev Team
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* @copyright Copyright (c) 2008 - 2011, EllisLab, Inc.
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* @license http://codeigniter.com/user_guide/license.html
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* @link http://codeigniter.com
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* @since Version 1.0
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* @filesource
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*/
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// ------------------------------------------------------------------------
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/**
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* Initialize the database
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*
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* @category Database
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* @author ExpressionEngine Dev Team
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* @link http://codeigniter.com/user_guide/database/
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*/
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function &DB($params = '', $active_record_override = NULL)
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{
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// Load the DB config file if a DSN string wasn't passed
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if (is_string($params) AND strpos($params, '://') === FALSE)
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{
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$file_path = APPPATH.'config/'.ENVIRONMENT.'/database'.EXT;
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if ( ! file_exists($file_path))
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{
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log_message('debug', 'Database config for '.ENVIRONMENT.' environment is not found. Trying global config.');
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$file_path = APPPATH.'config/database'.EXT;
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if ( ! file_exists($file_path))
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{
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continue;
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}
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}
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include($file_path);
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if ( ! isset($db) OR count($db) == 0)
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{
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show_error('No database connection settings were found in the database config file.');
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}
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if ($params != '')
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{
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$active_group = $params;
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}
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if ( ! isset($active_group) OR ! isset($db[$active_group]))
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{
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show_error('You have specified an invalid database connection group.');
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}
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$params = $db[$active_group];
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}
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elseif (is_string($params))
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{
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/* parse the URL from the DSN string
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* Database settings can be passed as discreet
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* parameters or as a data source name in the first
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* parameter. DSNs must have this prototype:
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* $dsn = 'driver://username:password@hostname/database';
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*/
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if (($dns = @parse_url($params)) === FALSE)
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{
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show_error('Invalid DB Connection String');
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}
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$params = array(
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'dbdriver' => $dns['scheme'],
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'hostname' => (isset($dns['host'])) ? rawurldecode($dns['host']) : '',
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'username' => (isset($dns['user'])) ? rawurldecode($dns['user']) : '',
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'password' => (isset($dns['pass'])) ? rawurldecode($dns['pass']) : '',
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'database' => (isset($dns['path'])) ? rawurldecode(substr($dns['path'], 1)) : ''
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);
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// were additional config items set?
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if (isset($dns['query']))
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{
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parse_str($dns['query'], $extra);
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foreach ($extra as $key => $val)
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{
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// booleans please
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if (strtoupper($val) == "TRUE")
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{
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$val = TRUE;
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}
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elseif (strtoupper($val) == "FALSE")
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{
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$val = FALSE;
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}
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$params[$key] = $val;
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}
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}
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}
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// No DB specified yet? Beat them senseless...
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if ( ! isset($params['dbdriver']) OR $params['dbdriver'] == '')
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{
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show_error('You have not selected a database type to connect to.');
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}
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// Load the DB classes. Note: Since the active record class is optional
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// we need to dynamically create a class that extends proper parent class
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// based on whether we're using the active record class or not.
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// Kudos to Paul for discovering this clever use of eval()
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if ($active_record_override !== NULL)
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{
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$active_record = $active_record_override;
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}
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require_once(BASEPATH.'database/DB_driver'.EXT);
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if ( ! isset($active_record) OR $active_record == TRUE)
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{
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require_once(BASEPATH.'database/DB_active_rec'.EXT);
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if ( ! class_exists('CI_DB'))
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{
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eval('class CI_DB extends CI_DB_active_record { }');
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}
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}
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else
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{
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if ( ! class_exists('CI_DB'))
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{
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eval('class CI_DB extends CI_DB_driver { }');
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}
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}
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require_once(BASEPATH.'database/drivers/'.$params['dbdriver'].'/'.$params['dbdriver'].'_driver'.EXT);
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// Instantiate the DB adapter
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$driver = 'CI_DB_'.$params['dbdriver'].'_driver';
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$DB = new $driver($params);
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if ($DB->autoinit == TRUE)
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{
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$DB->initialize();
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}
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if (isset($params['stricton']) && $params['stricton'] == TRUE)
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{
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$DB->query('SET SESSION sql_mode="STRICT_ALL_TABLES"');
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}
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return $DB;
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}
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/* End of file DB.php */
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/* Location: ./system/database/DB.php */
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