public function stream_close() {
    assert(isset($this->client));
    $this->client->close();
    $this->client = null;
  }
public function stream_close() {
    assert(isset($this->client));
    $this->client->close();
    $this->client = null;
  }
public function stream_close ( ) { assert ( isset ( $ this -> client ) ) ; $ this -> client -> close ( ) ; $ this -> client = null ; }
All resources that were locked, or allocated, by the wrapper should be
released.

No value is returned.
All resources that were locked or allocated by the wrapper should be released .