Heapgraph Node

:::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. :::

Get a specific node from the heap graph

namespace HH;

function heapgraph_node(
  resource $heapgraph,
  int $index,
): darray<string, mixed>;

Parameters

• resource $heapgraph - The resource obtained with heapgraph_create
• int $index - The node index

Returns

• array<string, - mixed> The requested node, containing these fields:

index the node id, equal to $index kind for non-roots, the node's HeaderKind. For roots, "Root". size the node's allocated size (including padding), in bytes. type if known, the node's C++ type name

if the node is an object: class PHP classname of the object

if the node is a static property (type == HPHP::StaticPropData) class PHP classname owning the static property prop name of the static property