Awaitable version of stream_select()

function stream_await(
  resource $fp,
  int $events,
  float $timeout = 0,
): Awaitable<int>;


  • resource $fp - Stream resource, must be backed by a file descriptor such as a normal file, socket, tempfile, or stdio. Does not work with memory streams or user streams.
  • int $events - Mix of STREAM_AWAIT_READ and/or STREAM_AWAIT_WRITE
  • float $timeout = 0 - Timeout in seconds


  • int - - Result code STREAM_AWAIT_CLOSED: Stream is closed STREAM_AWAIT_READY: Activity on the provided stream STREAM_AWAIT_TIMEOUT: No activity (timeout occured) STREAM_AWAIT_ERROR: Error