[Amit_B]

When the lotto ends, use

pawn Code:

for(new i = 0; i < MAX_PLAYERS; i++) PlayerInfo[i][pLotto] = 0;

also when player connecting to the server

pawn Code:

PlayerInfo[playerid][pLotto] = 0;

and on the command, above the strtok, add

pawn Code:

if(PlayerInfo[playerid][pLotto] != 0) return SendClientMessage(playerid,0xff0000ff,"You have already bought a ticket.");

What i've done here, is that the pLotto variable will be equal to 0 when the player didn't choosen any number.
If the PlayerInfo[playerid][pLotto] is not equal to 0, it means that he bought a ticket.