SetOnJoinCallback

:::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. :::

Set callback for when \HH\Asio\join() is called

final public static function setOnJoinCallback(
  mixed $callback,
): void;

Parameters

• mixed $callback - A Closure to be called on \HH\Asio\join()

Returns

• void