Getting player name and putting it into TextBox?

I have a part in Workspace named Part and inside it is a script, I want that script to on touched get the player's name that has just touched the part and put their name in a GUI

local playername = game.StarterGui.checkinGui.mainFrame.playerName
local plrname = game.Players.LocalPlayer

function onTouch()
	playername = plrname.Name
end

script.Parent.Touched:connect(onTouch)

Using a normal Script btw, not a LocalScript.

The way to do this via ServerScript would be :GetPlayerFromCharacter() which does exactly what you would think it does, gets the player from a character.

--in a ServerScript
script.Parent.Touched:connect(function(part)
	local maybePlayer = game.Players:GetPlayerFromCharacter(part.Parent)
	if maybePlayer then --if it's a player
		local name = maybePlayer.Name
		--other stuff here
	end
end)

Not 100% sure this will work and may require some tweaking to your situation, but this is what I got.

--Here is the local script running ON YOUR PERSON
    local Event = repStorage:WaitForChild("YourRemoteEvent")
    part.Touched:connect(function(hit)

if hit.Parent == game.Players.LocalPlayer then
Event:FireServer(hit.Parent)
end



    end)


--Here is the server script
local Event = repStorage:WaitForChild("YourRemoteEvent")
Event.OnServerEvent:connect(function(player, hit)


NavigateToWhereTheTextIs.Text = hit


end)

Like I said, you need to tweak it a little bit, but I think it SHOULD work. I didn't test it so if it doesn't try your best to figure it out, or just reply asking.

Try This:

--Thanks jamiethegreatQ777 For Making This :)
Credit To jamiethegreatQ777 = true
if Credit To jamiethegreatQ777 == false then return end
game.Workspace.part.SurfaceGui.TextBox.Text = game.players.Localplayer "..PlayerName.."

I'm Sure This Will Work If Not Please Message Me twitter.com/jamiethegreatQ7