CloseableHandle

:::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. :::

A non-disposable handle that is explicitly closeable

Some handles, such as those returned by IO\server_error() may be neither disposable nor closeable.

Interface Synopsis

namespace HH\Lib\IO;

interface CloseableHandle implements Handle {...}

Public Methods

• ->close(): void
  Close the handle
• ->closeWhenDisposed(): \IDisposable
  Close the handle when the returned disposable is disposed