private function isPipe(): bool
    {
        if ($this->isPipe === null) {
            $this->isPipe = false;

            if (isset($this->stream)) {
                $mode         = \fstat($this->stream)['mode'];
                $this->isPipe = ($mode & self::FSTAT_MODE_S_IFIFO) !== 0;
            }
        }

        return $this->isPipe;
    }
private function isPipe(): bool
    {
        if ($this->isPipe === null) {
            $this->isPipe = false;

            if (isset($this->stream)) {
                $mode         = \fstat($this->stream)['mode'];
                $this->isPipe = ($mode & self::FSTAT_MODE_S_IFIFO) !== 0;
            }
        }

        return $this->isPipe;
    }
private function isPipe ( ) : bool { if ( $ this -> isPipe === null ) { $ this -> isPipe = false ; if ( isset ( $ this -> stream ) ) { $ mode = \ fstat ( $ this -> stream ) [ 'mode' ] ; $ this -> isPipe = ( $ mode & self :: FSTAT_MODE_S_IFIFO ) !== 0 ; } } return $ this -> isPipe ; }
Returns whether or not the stream is a pipe.

@return bool
Returns whether or not the stream is a pipe .