# ConVars

### Execute

> :information\_source: Force full-update
>
> :information\_source: Turn up player footstep volume

```lua
-- Initialize the cvar objects
local cl_fullupdate = cvar.cl_fullupdate
local snd_setmixer = cvar.snd_setmixer

-- Invoke the callback
cl_fullupdate:call()

-- Adjust players’ step volume by setting the mixer volume to 1.2
snd_setmixer:call('GlobalFootsteps', 'vol', 1.2)
```

### Getting / Setting values

> :information\_source: Override maximum fake-lag limit

```lua
-- Initialize the cvar objects
local process_ticks = cvar.sv_maxusrcmdprocessticks

-- [60]: New value | [true]: Sets the raw value
process_ticks:int(60, true)
```

### Callbacks

> :information\_source: Instantly crash the server if someones changes the <mark style="color:yellow;">`sv_cheats`</mark> cvar to 1
>
> :information\_source: Refuse the connection to the server if the IP is blacklisted

```lua
cvar.sv_cheats:set_callback(function(cvar_obj, old_value, new_value)
    if tonumber(old_value) == 0 and tonumber(new_value) == 1 then
        -- invoke ent_create convar callback with "weapon_ak47" argument
        -- cvar.ent_create:call 'weapon_ak47'

        cvar.clear:call()
        print '\aFF697Asv_cheats was updated. Crashing the server.'

        utils.console_exec 'ent_create weapon_ak47'
    end
end)

cvar.connect:set_callback(function(cvar_obj, args)
    if args[1] == '127.0.0.1' then
        return false
    end
end)
```


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