[WooTFTW]

You're asking for something like this?

pawn Код:

COMMAND:destroyallvehicles(playerid, params[])
{
    if(IsPlayerAdmin(playerid))
    {
        for(new c=1;c<MAX_VEHICLES;c++)
        {
            DestroyVehicle(c);
        }
    }
    return true;
}

and BTW: https://sampforum.blast.hk/showthread.php?tid=187229