get all request parameters in laravel 8 code example

Example 1: how get some parameter from request in laravel

$data = $request->only(
            'project_name',
            'project_code',
            'block_count',
            'unit_count',
            'contractor_name',
   );

Example 2: laravel get all request parameters

$request->input('name');
$request->input('user.name'); // fetch from user object