Habari\InstallHandler::ajax_check_sqlite_credentials PHP Метод

    public function ajax_check_sqlite_credentials()
    {
        $db_file = $_POST['file'];
        $xml = new \SimpleXMLElement('<response></response>');
        // Missing anything?
        if (!isset($db_file)) {
            $xml->addChild('status', 0);
            $xml_error = $xml->addChild('error');
            $xml_error->addChild('id', '#databasefile');
            $xml_error->addChild('message', _t('The database file was left empty.'));
        }
        if (!isset($xml_error)) {
            if ($db_file == basename($db_file)) {
                // The filename was given without a path
                $db_file = Site::get_path('user', true) . $db_file;
            }
            if (!is_writable(dirname($db_file))) {
                $xml->addChild('status', 0);
                $xml_error = $xml->addChild('error');
                $xml_error->addChild('id', '#databasefile');
                $xml_error->addChild('message', _t('Cannot write to %s directory. SQLite requires that the directory that holds the DB file be writable by the web server.', array(dirname($db_file))));
            } elseif (file_exists(Site::get_path('user', true) . $db_file) && !is_writable(Site::get_path('user', true) . $db_file)) {
                $xml->addChild('status', 0);
                $xml_error = $xml->addChild('error');
                $xml_error->addChild('id', '#databasefile');
                $xml_error->addChild('message', _t('Cannot write to %s. The SQLite data file is not writable by the web server.', array($db_file)));
            } else {
                // Can we connect to the DB?
                $pdo = 'sqlite:' . $db_file;
                $connect = DB::connect($pdo, null, null);
                // Disconnect, but no longer delete the file - it could already have contents!
                DB::disconnect();
                switch ($connect) {
                    case true:
                        // We were able to connect to an existing database file.
                        $xml->addChild('status', 1);
                        break;
                    default:
                        // We can't create the database file, send an error message.
                        $xml->addChild('status', 0);
                        $xml_error = $xml->addChild('error');
                        // TODO: Add error codes handling for user-friendly messages
                        $xml_error->addChild('id', '#databasefile');
                        $xml_error->addChild('message', $connect->getMessage());
                }
            }
        }
        $xml = $xml->asXML();
        ob_clean();
        header("Content-type: application/xml");
        header("Cache-Control: no-cache");
        print $xml;
    }