PMA\libraries\plugins\export\ExportJson::exportDBHeader PHP Метод

    public function exportDBHeader($db, $db_alias = '')
    {
        global $crlf;
        if (empty($db_alias)) {
            $db_alias = $db;
        }
        $meta = array('type' => 'database', 'name' => $db_alias);
        return PMA_exportOutputHandler($this->encode($meta) . ',' . $crlf);
    }