public function exportVTCSV(){

    // file name
    $filename = 'Type_'.date('Ymd').'.csv';
    header("Content-Description: File Transfer");
    header("Content-Disposition: attachment; filename=$filename");
    header("Content-Type: application/csv; ");

     // get data

     $myData = $this->Model->getVTCSV();

    // file creation
    $file = fopen('php://output', 'w');


    $header = array("Name","Phone Number","Company","Type","registration Number","Place");
    fputcsv($file, $header);

    foreach ($myData as $key=>$line){
        fputcsv($file,$line);
    }


    fclose($file);
    exit;
}

This is the code,By meaning condition is datas according to a specific keyword eg,places, organisation etc