Detect Collisions Between Humanoids in Roblox

DetectCollisionsBetweenHumanoids.lua

-- DisplayTextModule is some code I use to display text on screen for testing, if you see this in a code snippet, ignore this part
local DisplayTextModule = require(script.Parent.Parent.StarterGui.ScreenGui.Frame.TextLabel.DisplayTextModuleScript)

local Players = game:GetService("Players")

-- Works for R15, not sure if this works for R6 or not
local function partIsHumanoid(part) 
	if part.Name == "Head" then
		return true
	elseif part.Name == "UpperTorso" then
		return true
	elseif part.Name == "LowerTorso" then
		return true
	elseif part.Name == "LeftFoot" then
		return true
	elseif part.Name == "LeftLowerLeg" then
		return true	
	elseif part.Name == "LeftUpperLeg" then
		return true
	elseif part.Name == "RightFoot" then
		return true
	elseif part.Name == "RightLowerLeg" then
		return true
	elseif part.Name == "RightUpperLeg" then
		return true	
	elseif part.Name == "LeftHand" then
		return true	
	elseif part.Name == "LeftLowerArm" then
		return true
	elseif part.Name == "LeftUpperArm" then
		return true
	elseif part.Name == "RightHand" then
		return true
	elseif part.Name == "RightLowerArm" then
		return true	
	elseif part.Name == "RightUpperArm" then
		return true
	else
		return false
	end
end

local function onPlayerAdded(player) 	
	local character = player.Character or player.CharacterAdded:Wait()
	local humanoid = character:WaitForChild("Humanoid")
	
	humanoid.Touched:Connect(function(otherPart)
		local timestampStr = tostring(os.time(os.date("!*t")))
		
		if partIsHumanoid(otherPart) then
			DisplayTextModule.Display("Collision w/ R15: " .. otherPart.Name)
		end
	end)
end

Players.PlayerAdded:Connect(onPlayerAdded)