[Correlli]

pawn Код:

new
    playerSpawn[MAX_PLAYERS];

public OnPlayerSpawn(playerid)
{
  if(playerSpawn[playerid] == 0)
  {
    // first spawn.
    playerSpawn[playerid] = 1; // player was spawned for the first time, now we'll set the variable to true.
  }
  else
  {
    // it's not his first spawn.
  }
  return true;
}

public OnPlayerDisconnect(playerid, reason)
{
  playerSpawn[playerid] = 0; // reset the variable when player disconnects.
  return true;
}

I've used the normal arrays here, you can easily change it to P-vars (new functions) if you want to.