[Shetch]

Create a variable that stores all the spawned vehicles.

Код:

new spawned_vehicles[MAX_PLAYERS][MAX_VEHICLES];

Once you spawn a vehicle, assign it's id to the variable.

Код:

spawned_vehicles[playerid][vehicleid] = 1; // '1' means that the vehicle is spawned.

When you want to destroy all player's spawned vehicles, use:

Код:

for(new i = 0; i < MAX_VEHICLES; i++)
{
if(spawned_vehicles[playerid][i] == 1)
{
DestroyVehicle(i);
spawned_vehicles[playerid][i] = 0;
}
}