ToKeysArray

:::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 an array whose values are the keys from the current Vector

public function toKeysArray(): varray<int>;

Returns

• varray<int> - An array with the integer keys from the current Vector.

Examples

$v = Vector {'red', 'green', 'blue', 'yellow'};

$keys_array = $v->toKeysArray();

\var_dump(\HH\is_any_array($keys_array));
\var_dump($keys_array);