Predefined variables list

Lua Predefined variables

_G -- returns a table of all global variables
coroutine -- returns a table containing functions for threads
debug -- returns a table containing debug functions
math -- returns a table that contains mathematical functions
string -- returns a table containing functions for strings
table -- returns a table that contains functions for tables
_VERSION -- returns a string of the version of lua in format "Lua 5.1"
self -- used in methods
arg -- used in functions which use '...' as an argument ([https://www.lua.org/pil/5.2.html])

MTA Predefined variables

Click to collapse [-]

Shared

exports -- returns a table of resource names containing all export functions
resource -- returns a resource element of the resource the snippet was executed in
resourceRoot -- returns a resource root element of the resource the snippet was executed in
root -- returns the root element of the server

Click to collapse [-]

Client only

guiRoot -- returns the root element of all GUI elements.
localPlayer -- returns the player element of the local player.

The list of hidden variables, that can be found in functions - handlers:

Click to collapse [-]

Shared

source -- The player or element the event was attached to
this -- Element, which was attached function-handler.
eventName -- the name of the event ("onResourceStart", "onPlayerWasted" etc.)

Click to collapse [-]

Server only

client -- the client that called the event 

More details about hidden variables in functions and events

Element_tree

List Predefined variables available in the HTTP files:

[php]
requestHeaders -- table, contains all HTTP headlines current page.
form -- table, contains all POST and GET settings, transferred current page.
cookies -- table, contains all COOKIE, transferred current page.
hostname -- string, contains IP or name host, which requested current page.
url -- string, URL current page.
user -- element, account user, which requested current page.

More info about it