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clear

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​

Examples​

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

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