Revision 2257 | Blame | Vergleich mit vorheriger | Letzte Änderung | Log anzeigen | RSS feed
<?php/*** CodeIgniter** An open source application development framework for PHP** This content is released under the MIT License (MIT)** Copyright (c) 2014 - 2019, British Columbia Institute of Technology** Permission is hereby granted, free of charge, to any person obtaining a copy* of this software and associated documentation files (the "Software"), to deal* in the Software without restriction, including without limitation the rights* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell* copies of the Software, and to permit persons to whom the Software is* furnished to do so, subject to the following conditions:** The above copyright notice and this permission notice shall be included in* all copies or substantial portions of the Software.** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN* THE SOFTWARE.** @package CodeIgniter* @author EllisLab Dev Team* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)* @copyright Copyright (c) 2014 - 2019, British Columbia Institute of Technology (https://bcit.ca/)* @license https://opensource.org/licenses/MIT MIT License* @link https://codeigniter.com* @since Version 1.0.0* @filesource*/defined('BASEPATH') OR exit('No direct script access allowed');/*** Initialize the database** @category Database* @author EllisLab Dev Team* @link https://codeigniter.com/user_guide/database/** @param string|string[] $params* @param bool $query_builder_override* Determines if query builder should be used or not*/function &DB($params = '', $query_builder_override = NULL){// Load the DB config file if a DSN string wasn't passedif (is_string($params) && strpos($params, '://') === FALSE){// Is the config file in the environment folder?if ( ! file_exists($file_path = APPPATH.'config/'.ENVIRONMENT.'/database.php')&& ! file_exists($file_path = APPPATH.'config/database.php')){show_error('The configuration file database.php does not exist.');}include($file_path);// Make packages contain database config files,// given that the controller instance already existsif (class_exists('CI_Controller', FALSE)){foreach (get_instance()->load->get_package_paths() as $path){if ($path !== APPPATH){if (file_exists($file_path = $path.'config/'.ENVIRONMENT.'/database.php')){include($file_path);}elseif (file_exists($file_path = $path.'config/database.php')){include($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)){show_error('You have not specified a database connection group via $active_group in your config/database.php file.');}elseif ( ! isset($db[$active_group])){show_error('You have specified an invalid database connection group ('.$active_group.') in your config/database.php file.');}$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:* $dsn = 'driver://username:password@hostname/database';*/if (($dsn = @parse_url($params)) === FALSE){show_error('Invalid DB Connection String');}$params = array('dbdriver' => $dsn['scheme'],'hostname' => isset($dsn['host']) ? rawurldecode($dsn['host']) : '','port' => isset($dsn['port']) ? rawurldecode($dsn['port']) : '','username' => isset($dsn['user']) ? rawurldecode($dsn['user']) : '','password' => isset($dsn['pass']) ? rawurldecode($dsn['pass']) : '','database' => isset($dsn['path']) ? rawurldecode(substr($dsn['path'], 1)) : '');// Were additional config items set?if (isset($dsn['query'])){parse_str($dsn['query'], $extra);foreach ($extra as $key => $val){if (is_string($val) && in_array(strtoupper($val), array('TRUE', 'FALSE', 'NULL'))){$val = var_export($val, TRUE);}$params[$key] = $val;}}}// No DB specified yet? Beat them senseless...if (empty($params['dbdriver'])){show_error('You have not selected a database type to connect to.');}// 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 query builder class or not.if ($query_builder_override !== NULL){$query_builder = $query_builder_override;}// Backwards compatibility work-around for keeping the// $active_record config variable working. Should be// removed in v3.1elseif ( ! isset($query_builder) && isset($active_record)){$query_builder = $active_record;}require_once(BASEPATH.'database/DB_driver.php');if ( ! isset($query_builder) OR $query_builder === TRUE){require_once(BASEPATH.'database/DB_query_builder.php');if ( ! class_exists('CI_DB', FALSE)){/*** CI_DB** Acts as an alias for both CI_DB_driver and CI_DB_query_builder.** @see CI_DB_query_builder* @see CI_DB_driver*/class CI_DB extends CI_DB_query_builder { }}}elseif ( ! class_exists('CI_DB', FALSE)){/*** @ignore*/class CI_DB extends CI_DB_driver { }}// Load the DB driver$driver_file = BASEPATH.'database/drivers/'.$params['dbdriver'].'/'.$params['dbdriver'].'_driver.php';file_exists($driver_file) OR show_error('Invalid DB driver');require_once($driver_file);// Instantiate the DB adapter$driver = 'CI_DB_'.$params['dbdriver'].'_driver';$DB = new $driver($params);// Check for a subdriverif ( ! empty($DB->subdriver)){$driver_file = BASEPATH.'database/drivers/'.$DB->dbdriver.'/subdrivers/'.$DB->dbdriver.'_'.$DB->subdriver.'_driver.php';if (file_exists($driver_file)){require_once($driver_file);$driver = 'CI_DB_'.$DB->dbdriver.'_'.$DB->subdriver.'_driver';$DB = new $driver($params);}}$DB->initialize();return $DB;}