[Threshold]

Use:

pawn Код:

CMD:infect(playerid,params[])
{
    if(gTeam[playerid] != TEAM_ZOMBIES) return xSCM"{FFA500}*{EEEEEE}You're not a zombie!");
    new targetid;
    if(sscanf(params, "u", targetid)) return xSCM"{FFA500}*{EEEEEE}Usage:/infect [playerid]");
    if(targetid == INVALID_PLAYER_ID || !IsPlayerConnected(targetid) || targetid == playerid) return NOACCESS;
    if(gTeam[targetid] == TEAM_ZOMBIES) return xSCM"{FFA500}*{EEEEEE}They are already a zombie!");
    new string[100], pName[MAX_PLAYER_NAME], tName[MAX_PLAYER_NAME];
    GetPlayerName(playerid, pName, sizeof(pName));
    GetPlayerName(targetid, tName, sizeof(tName));
    format(string, sizeof(string), "{FFA500}*%s has infected %s and now they're a zombie", pName, tName);
    SendClientMessageToAll(COLOR_WHITE, string);
    gTeam[targetid] = TEAM_ZOMBIES;
    SetPlayerColor(targetid, COLOR_ORANGE);
    SetPlayerPos(targetid, -273.5326, 1152.8778, 20.7803);
    SetPlayerHealth(targetid, 100.0);
    return 1;
}

With the Jeff's GetClosestPlayer and OnPlayerKeyStateChange. Take note that Jeff's GetClosestPlayer is suited to get a player within 2.0 units of 'playerid'.