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Set Pre Timeout Handler

hphp/hack/manual/apis/Functions/set_pre_timeout_handler.md

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:::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. :::

Hack
function set_pre_timeout_handler(
  int $seconds,
  (function(HH\Awaitable<mixed>): void) $callback,
): void;

Parameters

  • int $seconds
  • (function(HH\Awaitable<mixed>): void) $callback

Returns

  • void
<!-- HHAPIDOC -->