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/halogy/database/DB.php

https://bitbucket.org/haloweb/halogy-1.0/
PHP | 146 lines | 83 code | 25 blank | 38 comment | 22 complexity | 64c5168e5d9ff3c7232ffc5894b4633e MD5 | raw file
  1<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
  2/**
  3 * CodeIgniter
  4 *
  5 * An open source application development framework for PHP 4.3.2 or newer
  6 *
  7 * @package		CodeIgniter
  8 * @author		ExpressionEngine Dev Team
  9 * @copyright	Copyright (c) 2008 - 2009, EllisLab, Inc.
 10 * @license		http://codeigniter.com/user_guide/license.html
 11 * @link		http://codeigniter.com
 12 * @since		Version 1.0
 13 * @filesource
 14 */
 15
 16// ------------------------------------------------------------------------
 17
 18/**
 19 * Initialize the database
 20 *
 21 * @category	Database
 22 * @author		ExpressionEngine Dev Team
 23 * @link		http://codeigniter.com/user_guide/database/
 24 */
 25function &DB($params = '', $active_record_override = FALSE)
 26{
 27	// Load the DB config file if a DSN string wasn't passed
 28	if (is_string($params) AND strpos($params, '://') === FALSE)
 29	{
 30		include(APPPATH.'config/database'.EXT);
 31		
 32		if ( ! isset($db) OR count($db) == 0)
 33		{
 34			show_error('No database connection settings were found in the database config file.');
 35		}
 36		
 37		if ($params != '')
 38		{
 39			$active_group = $params;
 40		}
 41		
 42		if ( ! isset($active_group) OR ! isset($db[$active_group]))
 43		{
 44			show_error('You have specified an invalid database connection group.');
 45		}
 46		
 47		$params = $db[$active_group];
 48	}
 49	elseif (is_string($params))
 50	{
 51		
 52		/* parse the URL from the DSN string
 53		*  Database settings can be passed as discreet
 54	 	*  parameters or as a data source name in the first
 55	 	*  parameter. DSNs must have this prototype:
 56	 	*  $dsn = 'driver://username:password@hostname/database';
 57		*/
 58	
 59		if (($dns = @parse_url($params)) === FALSE)
 60		{
 61			show_error('Invalid DB Connection String');
 62		}
 63		
 64		$params = array(
 65							'dbdriver'	=> $dns['scheme'],
 66							'hostname'	=> (isset($dns['host'])) ? rawurldecode($dns['host']) : '',
 67							'username'	=> (isset($dns['user'])) ? rawurldecode($dns['user']) : '',
 68							'password'	=> (isset($dns['pass'])) ? rawurldecode($dns['pass']) : '',
 69							'database'	=> (isset($dns['path'])) ? rawurldecode(substr($dns['path'], 1)) : ''
 70						);
 71		
 72		// were additional config items set?
 73		if (isset($dns['query']))
 74		{
 75			parse_str($dns['query'], $extra);
 76
 77			foreach($extra as $key => $val)
 78			{
 79				// booleans please
 80				if (strtoupper($val) == "TRUE")
 81				{
 82					$val = TRUE;
 83				}
 84				elseif (strtoupper($val) == "FALSE")
 85				{
 86					$val = FALSE;
 87				}
 88
 89				$params[$key] = $val;
 90			}
 91		}
 92	}
 93	
 94	// No DB specified yet?  Beat them senseless...
 95	if ( ! isset($params['dbdriver']) OR $params['dbdriver'] == '')
 96	{
 97		show_error('You have not selected a database type to connect to.');
 98	}
 99
100	// Load the DB classes.  Note: Since the active record class is optional
101	// we need to dynamically create a class that extends proper parent class
102	// based on whether we're using the active record class or not.
103	// Kudos to Paul for discovering this clever use of eval()
104	
105	if ($active_record_override == TRUE)
106	{
107		$active_record = TRUE;
108	}
109	
110	require_once(BASEPATH.'database/DB_driver'.EXT);
111
112	if ( ! isset($active_record) OR $active_record == TRUE)
113	{
114		require_once(BASEPATH.'database/DB_active_rec'.EXT);
115		
116		if ( ! class_exists('CI_DB'))
117		{
118			eval('class CI_DB extends CI_DB_active_record { }');
119		}
120	}
121	else
122	{
123		if ( ! class_exists('CI_DB'))
124		{
125			eval('class CI_DB extends CI_DB_driver { }');
126		}
127	}
128			
129	require_once(BASEPATH.'database/drivers/'.$params['dbdriver'].'/'.$params['dbdriver'].'_driver'.EXT);
130
131	// Instantiate the DB adapter
132	$driver = 'CI_DB_'.$params['dbdriver'].'_driver';
133	$DB =& instantiate_class(new $driver($params));
134	
135	if ($DB->autoinit == TRUE)
136	{
137		$DB->initialize();
138	}
139	
140	return $DB;
141}	
142
143
144
145/* End of file DB.php */
146/* Location: ./system/database/DB.php */