Hphp Debugger Attached

:::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. :::

Quickly determine if a debugger is attached to this process and configured to debug this thread

function hphp_debugger_attached(): bool;

Returns

• bool - - TRUE if a debugger is attached, FALSE if not.