[HostedPlayerss]

PHP код:

new bool:onCheck[MAX_PLAYERS];
public OnPlayerEnterCheckpoint(playerid)
{
    if(onCheck[playerid])  
    { 
        DisablePlayerCheckpoint(playerid);
        onCheck[playerid] = false;
    }
    return 1;
} 


Ou Simplesmente use

PHP код:

DisablePlayerCheckpoint(playerid);