Undefined Symbol " playerid "

And yes. I got this error and I have to fix it. Because I'm using it for an important thing.
Do anyone have any idea? For to how to define playerid.

PHP Code:

public OnRconLoginAttempt(ip[], password[], success) 
{ 
            if(success == 1) {
            new Name[32], string[128];
            GetPlayerName(playerid, Name, sizeof Name); 
            format(string, sizeof string, " %s | %s | %s",Name(playerid), ip, success); 
             fwrite("rcons.txt", string)
          } 
        else 
         { 
          if(success == 0) 
          { 
          Ban(playerid); 
          } 
}
return 1;
} 


This entry passed through the Full-Text RSS service - if this is your content and you're reading it on someone else's site, please read the FAQ at http://ift.tt/jcXqJW.
Recommended article from FiveFilters.org: Most Labour MPs in the UK Are Revolting.

Undefined Symbol " playerid "