HH\Lib\IO\ReadHandle::readImpl

Meta Engineer?

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

An immediate, unordered read

public function readImpl(
  ?int $max_bytes = NULL,
): string;

Parameters

?int $max_bytes = NULL the maximum number of bytes to read
if null, an internal default will be used.
if 0, EINVAL will be raised.
up to $max_bytes may be allocated in a buffer; large values may lead to unnecessarily hitting the request memory limit.