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The containing class is available as IO\WriteHandle in the www repository.

Write all of the requested data

public function writeAllAsync(
  string $bytes,
  ?int $timeout_ns = NULL,
): Awaitable<void>;

A wrapper aroudn writeAsync() that will:

  • do multiple writes if necessary to write the entire provided buffer
  • fail with EPIPE if it is not possible to write all the requested data

It is possible for this to never return, e.g. if called on a pipe or or socket which the other end keeps open forever. Set a timeout if you do not want this to happen.


  • string $bytes
  • ?int $timeout_ns = NULL