[xAndrewx]

PHP Code:

/*
  player.addExperience(leveltype, amount)
    Will add some experience for the player
  
  player.findEXPNeeded(leveltype)
    Will return how much EXP is needed to gain a level
*/
function onCreated()
{
  this.levelTypes = {"Physical", "Magic"};
}

public function findEXPNeeded(levelType)
{
  if (this.levelTypes.index(temp.levelType) < 0)
  {
    return false;
  }
  temp.neededEXP = this.findSolution(makevar("this.clientr.level_" @ temp.levelType));
  temp.currentEXP = makevar("this.clientr.exp_" @ temp.levelType);

  this.chat = format(_("I need to gain %f more experience!"), (temp.neededEXP - temp.currentEXP));
}

function findSolution(playerLevel)
{
  temp.expNeeded = (((temp.playerLevel * 100) * 1000) / 50);
  return temp.expNeeded;
}
  
public function addExperience(expType, amountAdding)
{
  if (this.levelTypes.index(temp.expType) < 0)
  {
    return false;
  }
  if (temp.amountAdding == NULL)
  {
    return false;
  }
  temp.amountAdding = int(temp.amountAdding);
  
  this.clientr.("exp_" @ temp.expType) += temp.amountAdding;
  savelog2("ExpLog.txt", format(_("+%s added %f to %s!"), this, temp.AmountAdding, temp.expType));

  temp.curExpAmount = makevar("this.clientr.exp_" @ temp.expType);
  temp.neededEXP = this.findSolution(makevar("this.clientr.level_" @ temp.expType));

  this.chat = format(_("Gained %d in %s! (%d / %d)"), temp.amountAdding, temp.expType, temp.curExpAmount, temp.neededEXP);
  
  if (temp.curExpAmount => temp.neededEXP)
  {
    this.clientr.("level_" @ temp.expType) += 1;
    savelog2("LevelLog.txt", format(_("+%s gained a level in %s. (Exp Gained: %f. Current Level: %i.)!"), this, temp.expType, temp.AmountAdding, this.clientr.("level_" @ temp.expType)));

    this.chat = format(_("Gained a level in %s! I am now level %d!"), temp.expType, makevar("this.clientr.level_" @ temp.expType));
  }
} 


It's a player class, so you'll need to join it to the player (player.join("expsystem").
It explains how to add experience to the player and also return how much EXP is needed for a certain level type.
To create your own level types, just edit the 'this.levelTypes' array.