[axi92]

Is there a way to prevent shooting out of cars whether the player is the driver or not?

[Pottus]

Just set their armed weapon to 0 when they get in a car you can also check when they fire a weapon just in case.

pawn Код:

public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
{
    if(newkeys & KEY_FIRE &&
        IsPlayerInAnyVehicle(playerid) &&
        GetPlayerWeapon(playerid) != 0)
        SetPlayerArmedWeapon(playerid, 0);
    return 1;
}

[axi92]

How do I handle if someone press "H" to hang out of the car?

[CalvinC]

Use KEY_CROUCH.
https://sampwiki.blast.hk/wiki/Keys