89 lines
1.8 KiB
PHP
89 lines
1.8 KiB
PHP
<?php
|
|
/**
|
|
* Query
|
|
*
|
|
* Free Query Builder / Database Abstraction Layer
|
|
*
|
|
* @author Timothy J. Warren
|
|
* @copyright Copyright (c) 2012
|
|
* @link https://github.com/aviat4ion/Query
|
|
* @license http://philsturgeon.co.uk/code/dbad-license
|
|
*/
|
|
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Connection registry
|
|
*
|
|
* Decouples the Settings class from the query builder
|
|
* and organizes database connections
|
|
*
|
|
* @package Query
|
|
* @subpackage Helper Classes
|
|
*/
|
|
class DB_Reg {
|
|
|
|
/**
|
|
* Static array of connections
|
|
*/
|
|
private static $instance=array();
|
|
|
|
/**
|
|
* Registry access method
|
|
*
|
|
* @param string $key
|
|
* @return object
|
|
*/
|
|
public static function &get_db($key)
|
|
{
|
|
if ( ! isset(self::$instance[$key]))
|
|
{
|
|
// The constructor sets the instance
|
|
new DB_Reg($key);
|
|
}
|
|
|
|
return self::$instance[$key];
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Private constructor
|
|
*
|
|
* @param string $key
|
|
*/
|
|
private function __construct($key)
|
|
{
|
|
// Get the db connection parameters for the current database
|
|
$db_params = Settings::get_instance()->get_db($key);
|
|
|
|
// Set the current key in the registry
|
|
self::$instance[$key] = new Query_Builder($db_params);
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Return exiting connections
|
|
*
|
|
* @return array
|
|
*/
|
|
public static function get_connections()
|
|
{
|
|
return array_keys(self::$instance);
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Remove a database connection
|
|
*
|
|
* @param string $key
|
|
* @return void
|
|
*/
|
|
public static function remove_db($key)
|
|
{
|
|
unset(self::$instance[$key]);
|
|
}
|
|
}
|
|
// End of dbreg.php
|