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readFixedSizeAsync

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.

public function readFixedSizeAsync(
  int $size,
  ?int $timeout_ns = NULL,
): Awaitable<string>;

Parameters​

  • int $size
  • ?int $timeout_ns = NULL

Returns​