detect changes on laravel input prefilled values

i am working on a settings page were a user sees his prefilled username and email in the input fields. I like to detect (without jQuery 😀) if the user changed the prefilled values on the inputs.

For the password reset fields (not prefilled) i use the follwing logic:

if($request['password'] != ""){
    if(!(Hash::check($request['password'], Auth::user()->password))){
      return redirect()->back()->with('error', 'Your password does not match with the password you provided.');
    }

    if(strcmp($request['password'], $request['new_password']) == 0){
      return redirect()->back()->with('error', 'New password cannot be same as your old one.');
    }

    $validation = $request->validate([
      'password' => 'required',
      'new_password' => 'required|string|min:6|confirmed',
    ]);

    $user->password = bcrypt($request['new_password']);
    $user->save();

    return redirect()->back()->with('alert-success', 'Password changed 
     successfully');
}

How can i check if the user changed the prefilled code to use the following procedure:

if($request[''] ????? ""){
    $user = Auth::user();
    $user->name = $request['name'];
    $user->email = $request['email'];
    $user->save();
}

Thanks

via Chebli Mohamed