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Viewing changes to codeigniter/system/database/DB.php

  • Committer: galaxyAbstractor
  • Date: 2013-04-10 15:58:59 UTC
  • mfrom: (20.1.1 lenasys)
  • mto: This revision was merged to the branch mainline in revision 23.
  • Revision ID: galaxyabstractor@gmail.com-20130410155859-cih60kaz5es8savt
CodeIgniter implementation of basic CMS system

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codeigniter/system/database/DB.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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 * @param       string
 
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 * @param       bool    Determines if active record should be used or not
 
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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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                // Is the config file in the environment folder?
 
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                if ( ! defined('ENVIRONMENT') OR ! file_exists($file_path = APPPATH.'config/'.ENVIRONMENT.'/database.php'))
 
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                {
 
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                        if ( ! file_exists($file_path = APPPATH.'config/database.php'))
 
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                        {
 
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                                show_error('The configuration file database.php does not exist.');
 
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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.php');
 
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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.php');
 
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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.php');
 
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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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146
        if ($DB->autoinit == TRUE)
 
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        {
 
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                $DB->initialize();
 
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        }
 
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151
        if (isset($params['stricton']) && $params['stricton'] == TRUE)
 
152
        {
 
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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 */
 
 
b'\\ No newline at end of file'