ReadAllAsync

:::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. :::

Read until there is no more data to read

public function readAllAsync(
  ?int $max_bytes = NULL,
  ?int $timeout_ns = NULL,
): Awaitable<string>;

It is possible for this to never return, e.g. if called on a pipe or or socket which the other end keeps open forever. Set a timeout if you do not want this to happen.

Up to $max_bytes may be allocated in a buffer; large values may lead to unnecessarily hitting the request memory limit.

Parameters

• ?int $max_bytes = NULL
• ?int $timeout_ns = NULL

Returns

• Awaitable<string>