heapgraph_foreach_root

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.

Iterates over the root edges in the heap graph

namespace HH;

function heapgraph_foreach_root(
  resource $heapgraph,
  mixed $callback,
): void;

Calls back on every root edge. The "from" field of each root edge will be root node. root nodes are also enumerable by calling heapgraph_foreach_root_node().

Parameters

• resource $heapgraph - The resource obtained with heapgraph_create
• mixed $callback - function(darray<string, mixed> $edge): void {} See documentation for heapgraph_edge() about the "edge" array passed to $callback

Returns

• void