Retrieving Input: Old Input

$request->flash();

$request->flashOnly(['username', 'email']);

$request->flashExcept('password');

The flash method on the Illuminate\Http\Request class will flash the current input to the session so that it is available during the user's next request to the application.

You may also use the flashOnly and flashExcept methods to flash a subset of the request data to the session.

Return redirect('form')->withInput();

return redirect('form')->withInput(
    $request->except('password')
);

Since you often will want to flash input to the session and then redirect to the previous page, you may easily chain input flashing onto a redirect using the withInput method.

$username = $request->old('username');

<input type="text" name="username" value="{{ old('username') }}">

• To retrieve flashed input from the previous request, use the old method on the Request instance.
• Laravel also provides a global old helper.
• If you are displaying old input within a Blade template, it is more convenient to use the old helper.