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 a varray whose values are the keys from the current Pair

public function toKeysArray(): varray<int>;

Returns

• varray<int> - a varray with the integer keys from the current Pair.

Examples

$p = Pair {'foo', -1.5};

\var_dump($p->toKeysArray());