[ 'required', 'file', 'mimes:csv,txt', 'mimetypes:text/csv,text/plain,application/csv,text/comma-separated-values,text/anytext,application/octet-stream,application/txt', function ($attribute, $value, $fail) { if ($this->import->getClientMimeType() !== 'text/csv' && $this->import->getClientMimeType() !== 'application/vnd.ms-excel') { $fail(__('Le fichier doit ĂȘtre d\'un mime type text/csv ou application/vnd.ms-excel')); } } ] ]; } }