I have added daterange picker in my view file. But when i'm export report, how can i pass selected daterange in export.

How can i pass selected daterange (view file) when i'm exporting as excel.

Yes, i'm using input package.

here, is my sample code

test.view.php

<?php
use \koolreport\inputs\DateRangePicker;
use \koolreport\datagrid\DataTables;
?>

<div class="text-center">
    <h1>Request Log Report</h1>
</div>
<div>
    <form method="post">
        <div class="row">
            <div class="col-md-3 form-group">
                <?php
                    DateRangePicker::create(array(
                        "name"=>"requestLogDateRange",
                    ));
                ?>
            </div>
            <div class="col-md-3 form-group">
                <button class="btn btn-primary">
                    <i class="fa fa-bar-chart"></i> Preview
                </button>
            </div>
            <?php
                if($this->dataStore("request_log_report_data")->countData()>0) {
            ?>
                <div class="col-md-6 form-group">
                    <a href="exportPdf.php" class="btn btn-primary pull-right" style="margin-left:  10px;">Download PDF</a>
                    <a href="exportExcel.php" class="btn btn-primary pull-right"  style="margin-left:  10px;">Download Excel</a>
                    <a href="exportCsv.php" class="btn btn-primary pull-right">Download Csv</a>
                </div>
            <?php } ?>
        </div>
    </form>
    <hr/>

    <?php
        if($this->dataStore("request_log_report_data")->countData()>0)
        {
            DataTables::create(array(
                "dataStore"=>$this->dataStore("request_log_report_data"),
                "columns"=>array(
                    "Method"=>array(
                        "label"=>"Method"
                    ),
                    "URI"=>array(
                        "label"=>"URI"
                    ),
                    "Created By"=>array(
                        "label"=>"Created By"
                    ),
                    "Created"=>array(
                        "label"=>"Created"
                    ),
                ),
                "options"=>array(
                    "searching"=>true,
                    "paging"=>true,
                    "orders"=>array(
                        array(3,"desc"), //Sort by Created column desc
                    ),
                    "colReorder"=>true,
                    "fixedHeader"=>true,
                    "pageLength" => 25,
                )
            ));
        } else {
    ?>
    <div class="alert alert-warning">
        <i class="glyphicon glyphicon-info-sign"></i> Data is not available
    </div>
    <?php } ?>
</div>

sample.php

function setup()
    {
        $this->src('loanencounter')
        ->query("
            SELECT
                request_logs.method,
                request_logs.uri,
                request_logs.created_at,
                users.first_name,
                users.last_name
            FROM
                request_logs
            LEFT JOIN users ON request_logs.created_by = users.id
            WHERE
                request_logs.created_at >= :fromDate
                AND
                request_logs.created_at <= :toDate
        ")
        ->params(array(
            ":fromDate"=>$this->params["requestLogDateRange"][0],
            ":toDate"=>$this->params["requestLogDateRange"][1]
        ))
        ->pipe(new Custom(function($row){
            $row["first_name"] = $row["first_name"]." ".$row["last_name"];
            return $row;
        }))
        ->pipe(new ColumnRename(array(
            "method"=>"Method",
            "uri"=>"URI",
            "first_name"=>"Created By",
            "created_at"=>"Created",
        )))
        ->pipe(new RemoveColumn(array(
            "last_name"
        )))
        ->pipe(new Sort(array(
            "Created"=>"desc"
        )))
        ->pipe($this->dataStore('request_log_report_data'));
    }

i'm using seprate php file for export.

<?php
require_once "RequestLog.php";
$report = new RequestLog;

$report->run()->exportToExcel()->toBrowser("RequestLog.csv");

I can access parameter in setup(). but whenever i'm changing daterange in view. it's not change in export. here, is my defaultParamValues() protected function defaultParamValues()

{
    $toDate = date("Y-m-d H:i:s");
    $fromDate = date('Y-m-d',strtotime("-6 days"));
    return array(
        "requestLogDateRange"=>array($fromDate, $toDate)
    );
}