[HyDrAtIc]

Maybe try this?

pawn Код:

if (strcmp(cmdtext, "/locker", true)==0)
{
 if(IsPlayerInAnyVehicle(playerid))
 {
  new State=GetPlayerState(playerid);
  if(State!=PLAYER_STATE_DRIVER)
  {
   SendClientMessage(playerid,0xFF004040,"You can only lock the doors as the driver.");
   return 1;
  }
  new i;
  for(i=0;i<MAX_PLAYERS;i++)
  {
   if(i != playerid)
   {
    SetVehicleParamsForPlayer(GetPlayerVehicleID(playerid),i, 0, 1);
   }
  }
  new lock;
  for(lock=0;i<MAX_PLAYERS;lock++)
  if(lock == 1)
        {
       SendClientMessage(playerid, 0xFF004040,"Tu jau esi aizsleedzis kaadu citu transporta liidzekli.");
    lock == 1;
             return 1;
  }
  if(lock == 0)
  {
   SendClientMessage(playerid, 0x33AA33AA,"Transporaliidzeklis aizsleegts.");
  }
  SendClientMessage(playerid, 0x33AA33AA, "Vehicle locked!");
  new Float:pX, Float:pY, Float:pZ;
  GetPlayerPos(playerid,pX,pY,pZ);
  PlayerPlaySound(playerid,1056,pX,pY,pZ);
 }
 else
 {
 SendClientMessage(playerid, 0xFF004040, "You're not in a vehicle!");
 }
 return 1;
    }
    if (strcmp(cmdtext, "/unlock", true)==0)
    {
 if(IsPlayerInAnyVehicle(playerid))
 {
 new State=GetPlayerState(playerid);
 if(State!=PLAYER_STATE_DRIVER)
 {
 SendClientMessage(playerid,0xFF004040,"You can only unlock the doors as the driver.");
 return 1;
 }
 new i;
 for(i=0;i<MAX_PLAYERS;i++)
 {
 SetVehicleParamsForPlayer(GetPlayerVehicleID(playerid),i, 0, 0);
 }
 SendClientMessage(playerid, 0x33AA33AA, "Vehicle unlocked!");
 new Float:pX, Float:pY, Float:pZ;
 GetPlayerPos(playerid,pX,pY,pZ);
 PlayerPlaySound(playerid,1057,pX,pY,pZ);
 }
 else
 {
 SendClientMessage(playerid, 0xFF004040, "You're not in a vehicle!");
 }
 return 0;
}
 return 1;
           }

If this worked tell me