[Hawky133]

Oh sorry.
Change

pawn Code:

public OnPlayerCommandPerformed(playerid, cmdtext[], success){
    if(success){
        lastcommand[playerid]=gettime();
        //sets the variable to the current UNIX timestamp- see below for details
    }
}

to

pawn Code:

public OnPlayerCommandPerformed(playerid, cmdtext[], success){
    if(success){
        lastcommand[playerid]=gettime();
        //sets the variable to the current UNIX timestamp- see below for details
    }
    return 1;//Forgot this!
}