How to export to excel on laravel?

Question

Laravel

Hello! Unable to export excel file to Laravel. I use the maatwebsite / excel library, I do it as in the documentation through the export method, it tries to send the headers, but then an error occurs - the headers have already been sent. Enter action code in controller

public function excel()
    {
        $filename = 'excel_export'.time();
        Excel::create($filename, function($excel){
            $excel->sheet('first tab', function($sheet){
                $callsQuery = DB::table('calls');
                $calls = $callsQuery->get();
               $sheet->loadView('home.first', array('calls' => $calls));
            });
        })->export('xls');
    }

Result

Answer 1

Check if there is a random space before the <?php tag and if the output functions are called in some middleware

Answer 2

Google "maatwebsite/excel headers already sent", first result, "call string() instead of export() then wrap up result in your response"
If that doesn't work, google further.

Answer 3

The issue seems to be still unresolved. I also advise you to check the file encoding - try between UTF-8 and UTF-8-BOM