Displaying weapon with damagelogs

[Humility]

I want to make an Damage Log menu display the weapon used to kill/damage.
Here is the code and I'm not sure if I've done it right:

Get Weapon:

function Damagelog:WeaponFromDmg(dmg)
   local inf = dmg:GetInflictor()
   local wep = nil
   if IsValid(inf) then
      if inf:IsWeapon() or inf.Projectile then
         wep = inf

Display Weapon

str_damage = "%killer[%killrole] dealt %dmg damage to %victim[%vicrole] using"..wep.."."

[jaooe]

You haven't explained your problem?

[Humility]

I wanted to make sure that I did it right.