By default, KoolGrid use postback to communicate with server and update data. When you page does not allow ajax communication, postback method seems the best option.
<?php
require $KoolControlsFolder."/KoolGrid/koolgrid.php";
require $KoolControlsFolder."/KoolGrid/ext/datasources/MySQLiDataSource.php";
$ds = new MySQLiDataSource($db_con);//This $db_con link has been created inside KoolPHPSuite/Resources/runexample.php
$ds->SelectCommand = "select customerNumber,customerName,phone,city from customers";
$grid = new KoolGrid("grid");
$grid->scriptFolder = $KoolControlsFolder."/KoolGrid";
$grid->styleFolder="default";
$grid->DataSource = $ds;
$grid->Width = "655px";
$grid->RowAlternative = true;
$grid->AutoGenerateColumns = true;
$grid->MasterTable->Pager = new GridPrevNextAndNumericPager();
$grid->Process();
?>
<form id="form1" method="post">
<?php echo $grid->Render();?>
</form>
KoolGrid - Powerful PHP GridFullVersion 5.7.0.0 released on 25/11/2016