File Source for upgrade

<?php
/**
* @version $Header$
* @package install
* @subpackage upgrade
*/
/**
* required setup
*/
$app = '';
include_once( INSTALL_PKG_PATH.'install_database.php' );
// update the MySQL settings in the db server array
if( function_exists( 'mysql_connect' ) ) {
// check version of mysql server
if( preg_match( '/[4-9]\./', @mysql_get_server_info() ) ) {
$dbtodsn['mysql'] = 'MySQL '.mysql_get_server_info();
} elseif( preg_match( '/3\./', @mysql_get_server_info() ) ) {
$dbtodsn['mysql'] = 'MySQL '.mysql_get_server_info().' WARNING!!!';
} else {
$dbtodsn['mysql'] = 'MySQL 3.x';
}
}
$gBitSmarty->assign( 'include_template', INSTALL_PKG_PATH."templates/install_database".$app.".tpl" );
?>

Source for file upgrade_database.php