MyBB Instalacja nie działa

set_path(INSTALL_ROOT.'resources');
$lang->load('language');

// Load DB interface
require_once MYBB_ROOT."inc/db_base.php";

// Prevent any shut down functions from running
$done_shutdown = 1;

// Include the necessary constants for installation
$grouppermignore = array('gid', 'type', 'title', 'description', 'namestyle', 'usertitle', 'stars', 'starimage', 'image');
$groupzerogreater = array('pmquota', 'maxpmrecipients', 'maxreputationsday', 'attachquota', 'maxemails', 'maxwarningsday', 'maxposts', 'edittimelimit', 'canusesigxposts', 'maxreputationsperuser', 'maxreputationsperthread', 'emailfloodtime');
$displaygroupfields = array('title', 'description', 'namestyle', 'usertitle', 'stars', 'starimage', 'image');
$fpermfields = array('canview', 'canviewthreads', 'candlattachments', 'canpostthreads', 'canpostreplys', 'canpostattachments', 'canratethreads', 'caneditposts', 'candeleteposts', 'candeletethreads', 'caneditattachments', 'canpostpolls', 'canvotepolls', 'cansearch', 'modposts', 'modthreads', 'modattachments', 'mod_edit_posts');

// Include the installation resources
require_once INSTALL_ROOT.'resources/output.php';
$output = new installerOutput;

$dboptions = array();

if(function_exists('mysqli_connect'))
{
	$dboptions['mysqli'] = array(
		'class' => 'DB_MySQLi',
		'title' => 'MySQL Improved',
		'short_title' => 'MySQLi',
		'structure_file' => 'mysql_db_tables.php',
		'population_file' => 'mysql_db_inserts.php'
	);
}

if(function_exists('mysql_connect'))
{
	$dboptions['mysql'] = array(
		'class' => 'DB_MySQL',
		'title' => 'MySQL',
		'short_title' => 'MySQL',
		'structure_file' => 'mysql_db_tables.php',
		'population_file' => 'mysql_db_inserts.php'
	);
}

if(function_exists('pg_connect'))
{
	$dboptions['pgsql'] = array(
		'class' => 'DB_PgSQL',
		'title' => 'PostgreSQL',
		'short_title' => 'PostgreSQL',
		'structure_file' => 'pgsql_db_tables.php',
		'population_file' => 'mysql_db_inserts.php'
	);
}

if(class_exists('PDO'))
{
	$supported_dbs = PDO::getAvailableDrivers();
	if(in_array('sqlite', $supported_dbs))
	{
		$dboptions['sqlite'] = array(
			'class' => 'DB_SQLite',
			'title' => 'SQLite 3',
			'short_title' => 'SQLite',
			'structure_file' => 'sqlite_db_tables.php',
			'population_file' => 'mysql_db_inserts.php'
		);
	}
}

if(file_exists('lock') && $mybb->dev_mode != true)
{
	$output->print_error($lang->locked);
}
else if($installed == true && empty($mybb->input['action']))
{
	$output->print_header($lang->already_installed, "errormsg", 0);
	echo $lang->sprintf($lang->mybb_already_installed, $mybb->version);
	$output->print_footer();
}
else
{
	$output->steps = array(
		'intro' => $lang->welcome,
		'license' => $lang->license_agreement,
		'requirements_check' => $lang->req_check,
		'database_info' => $lang->db_config,
		'create_tables' => $lang->table_creation,
		'populate_tables' => $lang->data_insertion,
		'templates' => $lang->theme_install,
		'configuration' => $lang->board_config,
		'adminuser' => $lang->admin_user,
		'final' => $lang->finish_setup,
	);

	switch($mybb->get_input('action'))
	{
		case 'license':
			license_agreement();
			break;
		case 'requirements_check':
			requirements_check();
			break;
		case 'database_info':
			database_info();
			break;
		case 'create_tables':
			create_tables();
			break;
		case 'populate_tables':
			populate_tables();
			break;
		case 'templates':
			insert_templates();
			break;
		case 'configuration':
			configure();
			break;
		case 'adminuser':
			create_admin_user();
			break;
		case 'final':
			install_done();
			break;
		default:
			$mybb->input['action'] = 'intro';
			intro();
			break;
	}
}