Clear

:::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. :::

Remove all the elements from the current Set

public function clear(): Set<Tv>;

Future changes made to the current Set ARE reflected in the returned Set, and vice-versa.

Returns

• Set<Tv> - Returns itself.

Examples

$s = Set {'red', 'green', 'blue', 'yellow'};
\var_dump($s);

$s->clear();
\var_dump($s);