application/core/database/DB.php
<?php
if (!defined('BASEPATH'))
exit('No direct script access allowed');
function &DB($params = '', $active_record_override = NULL) {
// Load the DB config file if a DSN string wasn't passed
if (is_string($params) AND strpos($params, '://') === FALSE) {
// the only logic changes are in next few lines
if (
!defined('ENVIRONMENT') OR
(
!file_exists($file_path = APPPATH . 'config/' . ENVIRONMENT . '/database.php') &&
!file_exists($file_path = APPPATH . 'config/' . ENVIRONMENT . '/config.php')
)
) {
if (
!file_exists($file_path = APPPATH . 'config/database.php') &&
!file_exists($file_path = APPPATH . 'config/config.php')
) {
show_error('The configuration file database.php does not exist.');
}
}
// ------------------
include($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) OR ! isset($db[$active_group])) {
show_error('You have specified an invalid database connection group.');
}
$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:
* $dsn = 'driver://username:password@hostname/database';
*/
if (($dns = @parse_url($params)) === FALSE) {
show_error('Invalid DB Connection String');
}
$params = array(
'dbdriver' => $dns['scheme'],
'hostname' => (isset($dns['host'])) ? rawurldecode($dns['host']) : '',
'username' => (isset($dns['user'])) ? rawurldecode($dns['user']) : '',
'password' => (isset($dns['pass'])) ? rawurldecode($dns['pass']) : '',
'database' => (isset($dns['path'])) ? rawurldecode(substr($dns['path'], 1)) : ''
);
// were additional config items set?
if (isset($dns['query'])) {
parse_str($dns['query'], $extra);
foreach ($extra as $key => $val) {
// booleans please
if (strtoupper($val) == "TRUE") {
$val = TRUE;
} elseif (strtoupper($val) == "FALSE") {
$val = FALSE;
}
$params[$key] = $val;
}
}
}
// No DB specified yet? Beat them senseless...
if (!isset($params['dbdriver']) OR $params['dbdriver'] == '') {
show_error('You have not selected a database type to connect to.');
}
// Load the DB classes. Note: Since the active record class is optional
// we need to dynamically create a class that extends proper parent class
// based on whether we're using the active record class or not.
// Kudos to Paul for discovering this clever use of eval()
if ($active_record_override !== NULL) {
$active_record = $active_record_override;
}
require_once(BASEPATH . 'database/DB_driver.php');
if (!isset($active_record) OR $active_record == TRUE) {
require_once(BASEPATH . 'database/DB_active_rec.php');
if (!class_exists('CI_DB')) {
eval('class CI_DB extends CI_DB_active_record { }');
}
} else {
if (!class_exists('CI_DB')) {
eval('class CI_DB extends CI_DB_driver { }');
}
}
require_once(BASEPATH . 'database/drivers/' . $params['dbdriver'] . '/' . $params['dbdriver'] . '_driver.php');
// Instantiate the DB adapter
$driver = 'CI_DB_' . $params['dbdriver'] . '_driver';
$DB = new $driver($params);
if ($DB->autoinit == TRUE) {
$DB->initialize();
}
if (isset($params['stricton']) && $params['stricton'] == TRUE) {
$DB->query('SET SESSION sql_mode="STRICT_ALL_TABLES"');
}
return $DB;
}
/* End of file DB.php */
/* Location: ./system/database/DB.php */