[Haydz]

You will need to create a variable.

pawn Код:

new bonnetvar[MAX_PLAYERS]; //top of the script
if (strcmp("/bonnet", cmdtext, true, 10) == 0)
{
       if(bonnetvar[playerid] == 0) 
       {
              GetVehicleParamsEx(carid,engine,lights,alarm,doors,bonnet,boot,objective);
              SetVehicleParamsEx(carid,engine,lights,alarm,doors,false,boot,objective);
              bonnetvar[playerid] = 1;
       }
       else
       {
                GetVehicleParamsEx(carid,engine,lights,alarm,doors,bonnet,boot,objective);
            SetVehicleParamsEx(carid,engine,lights,alarm,doors,false,boot,objective);
                bonnetvar[playerid] = 0;
       }
       return 1;
}

Something like that should hopefully work, if i did something wrong you could work it out with this thread https://sampforum.blast.hk/showthread.php?tid=189464