resolved unable to download empty campaign data

@@ -141,7 +141,6 @@ foreach($usersarr as $r => $userdata)
 	$ppldata[]=unserialize($userdata['peopledata']);
 }
 
-// dd($ppldata);
 for ($i=0; $i <count($ppldata) ; $i++) { 
 
 	for ($j=0; $j <count($finputarr) ; $j++) { 
@@ -171,7 +170,6 @@ if ($ppldata[$i] != false){
 			$headerexcel[$cachekey] = 'string'; //$headerexcel2[] = $cachekey => 'string';
 		}
 	}
-// dd($headerexcel2);
     $filename = "MainReport.xlsx";
     header('Content-disposition: attachment; filename="'.XLSXWriter::sanitize_filename($filename).'"');
     header("Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
@@ -183,11 +181,12 @@ if ($ppldata[$i] != false){
     $styles1 = array( 'font'=>'Arial','font-size'=>10,'font-style'=>'bold', 'fill'=>'#eee', 'halign'=>'center', 'border'=>'left,right,top,bottom');
     $writer->writeSheetHeader('Sheet1', $headerexcel,$styles1,['freeze_rows'=>1, 'freeze_columns'=>1]);
      $writer->writeSheetRow('Sheet1', $selectedfields,$styles1 );
-
+	if($usersdata != null){
 		foreach($usersdata as $row)
 		{
 		    $writer->writeSheetRow('Sheet1', $row, $row_options = ['height'=>15]);
 		}
+	 }
     $writer->writeToStdOut();
 
     return;