helpers.php

<?php

if ( ! function_exists('xls'))
{
	/**
	 * XLS Response.
	 * 
	 * @param  string  $filename
	 * @param  string  $view
	 * @param  array   $data
	 * @param  integer $status
	 * @return \Response
	 */
	function xls($filename, $view, $data = [], $status = 200)
	{
		$filename = $filename . date('YmdHis').'.xls';

		return response()->view($view, $data, $status, [ 
			"Pragma" => " public",
			"Expires" => " 0",
			"Cache-Control" => " must-revalidate, post-check=0, pre-check=0",
			"Content-Type" => " application/force-download",
			"Content-Type" => " application/octet-stream",
			"Content-Type" => " application/download",
			"Content-Disposition" => " attachment;filename={$filename}",
			"Content-Transfer-Encoding" => " binary ",
		]);
	}
}