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set_pre_timeout_handler

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.

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