Enum Exists

:::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. :::

Checks if the enum exists

function enum_exists(
  string $class_name,
  bool $autoload = true,
): bool;

Parameters

• string $class_name
• bool $autoload = true -

Returns

• bool - - Returns TRUE if enum exists, FALSE if not