ConstIndexAccess

:::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. :::

The interface for all keyed collections to enable access its values

Guides

• Introduction
• Interfaces

Interface Synopsis

interface ConstIndexAccess {...}

Public Methods

• ->at(Tk $k): Tv
  Returns the value at the specified key in the current collection
• ->containsKey(mixed $k): bool
  Determines if the specified key is in the current collection
• ->get(Tk $k): ?Tv
  Returns the value at the specified key in the current collection