Laravel generate csv for database tables column names only

/*-----------Get Sample CSV ----------------- */

public function getSampleCsv(Request $request,$id)

{

$columns= DB::getSchemaBuilder()->getColumnListing($id);

if (($key = array_search('created_at', $columns)) != false) {

unset($columns[$key]);

}

if (($key = array_search('updated_at', $columns)) != false) {

unset($columns[$key]);

}

$fileName = 'sample.csv';

$headers = array(

"Content-type" => "text/csv",

"Content-Disposition" => "attachment; filename=$fileName",

"Pragma" => "no-cache",

"Cache-Control" => "must-revalidate, post-check=0, pre-check=0",

"Expires" => "0"

);

$callback = function() use($columns) {

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

fputcsv($file, $columns);

};

return response()->stream($callback, 200, $headers);

}