How can I set encoding for export csv with Laravel Excel in Laravel

you need to configure your PblClassExport.php headers

in PblClassExport.php

/**
 * Optional headers
*/
private $headers = [
    'Content-Type' => 'text/csv',
    'Content-Encoding'=> 'SHIFT-JIS' // somthing like this ?
];

i have't done this but i think it will work

ref link

https://docs.laravel-excel.com/3.1/exports/exportables.html#exportables

Update

you can encode line by line

public function bindValue(Cell $cell, $value)
{
    $value = mb_convert_encoding($value, "SJIS");
    return parent::bindValue($cell, $value);
}

ref link https://www.gitmemory.com/issue/Maatwebsite/Laravel-Excel/1886/552849170

If you you use Laravel Excel 3.1, you can use WithCustomCsvSettings interface. Then you add your encoding setting in the getCsvSettings method like the following.

use Maatwebsite\Excel\Concerns\WithCustomCsvSettings;
class InvoicesExport implements WithCustomCsvSettings
{
   public function getCsvSettings(): array
   {
        return [
            'output_encoding' => 'SJIS',
         ];

    }
}

Plese refer to the docs for more details.

I resolved it. Let's me share my solution here.

Laravel Excel not support it by default.But we can do it by simple way.

1. Get csv content before download: \Excel::raw
2. Convert to another encoding: mb_convert_encoding https://docs.laravel-excel.com/3.1/exports/collection.html#storing-raw-contents
3. Download csv.

   $exportedObject= new \App\Exports\ClassExport($exportDataArray, $fileName);  
   $csvContent = \Excel::raw($exportedObject, $exportedObject->writerType);
   
   
   $csvContent = mb_convert_encoding($csvContent, 'SJIS', 'auto');  
   
   // In my case, I upload my csv to S3.
   $storageInstance = \Storage::disk('s3_import_csvs');  
   $putFileOnStorage = $storageInstance->put($fileName, $csvContent);
   

_{Note: Solution povided by OP on question section.}