Skip to main content

toKeysArray

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 an array containing the values from the current Set

public function toKeysArray(): varray<Tv>;

Sets don't have keys. So this method just returns the values.

This method is interchangeable with toValuesArray().

Returns​

  • varray<Tv> - an integer-indexed array containing the values from the current Set.

Examples​

This example shows that toKeysArray is the same as toValuesArray because Sets don't have keys:

$s = Set {'red', 'green', 'blue', 'yellow'};

$keys_array = $s->toKeysArray();

\var_dump($keys_array === $s->toValuesArray());
\var_dump($keys_array);