FromArrays

:::info[Note] This is a point-in-time snapshot of the API documentation from January 2026. Going forward, we will not be maintaining a public copy of these references, and recommend users to refer to the built-in signature helpers available in the Hack LSP instead for complete and up-to-date information. :::

Returns a Set containing all the values from the specified array(s)

public static function fromArrays(
  ...$argv,
): Set<Tv>;

Parameters

• ...$argv - The arrays to convert to a Set.

Returns

• Set<Tv> - A Set with the values from the passed array(s).

Examples

This example shows that duplicate values in the input arrays only appear once in the final Set:

$s = Set::fromArrays(
  varray['red'],
  varray['green', 'blue'],
  varray['yellow', 'red'], // Duplicate 'red' will be ignored
);

\var_dump($s);