variable_exists($name) Check whether a variable with the given name exists in the current scope or in the global scope.

red($color) Gets the red component of a color. Calculated from HSL where necessary via

map_values($map) Returns a list of all values in a map. This list may include duplicate values, if multiple keys have the

min($numbers...) Finds the minimum of several numbers. This function takes any number of arguments.

quote($string) Add quotes to a string if the string isn’t quoted, or returns the same string if it is.

random random($limit)

ceil($number) Rounds a number up to the next whole number.

to_upper_case($string) Converts a string to upper case.

global_variable_exists($name) Check whether a variable with the given name exists in the global scope (at the top level of

map_keys($map) Returns a list of all keys in a map.