if(IsPlayerInRangeOfPoint(playerid,2.0,x kordi,y kordi,z kordi))
{
//ha ott van
}
else
{
//ha nincs ott
}

COMMAND:announce(playerid,params[])
{
    if(isnull(params)) return SendClientMessage(playerid, -1, \"Használat: /announce [szöveg]\");
    GameTextForAll(params,5000,3);
    return 1;
}

if(strcmp(cmdtext, \"/announce\", true))
{
    new
        string[ 128 ],
        idx
    ;
    if(!IsPlayerAdmin(playerid)) return 0;
    new length = strlen(cmdtext);
    while ((idx < length) && (cmdtext[idx] <= \' \'))
    {
        idx++;
    }
    new offset = idx;
    new result[64];
    while ((idx < length) && ((idx - offset) < (sizeof(result) - 1)))
    {
        result[idx - offset] = cmdtext[idx];
        idx++;
    }
    result[idx - offset] = EOS;
    if(!strlen(result)) return SendClientMessage(playerid, -1, \"Használat: /announce [szöveg]\");
    format(string, sizeof(string), \"%s\", result);
    GameTextForAll(string, 5000, 3);
    return 1;
}

if(strcmp(cmdtext, \"/sanchez\", true) == 0)
{
if(GetPlayerMoney(playerid) < 1000) return SendClientMessage(playerid, -1, \"Nincs elég pénzed!\");
GivePlayerMoney(playerid, -10000);
new Float:x, Float:y, Float:z, Float:rot, sanchez;
GetPlayerPos(playerid, x, y, z);
GetPlayerFacingAngle(playerid, rot);
sanchez = CreateVehicle(468, x+1, y+1, z+1, rot, -1, -1, 1);
PutPlayerInVehicle(playerid, sanchez, 0);
return 1;
}