code: public function stream_open($path)
      {
          $scheme = parse_url($path, PHP_URL_SCHEME);
          if (substr($scheme, -10) === '-emulation') {
              $scheme = substr($scheme, 0, -10);
          }
  
          $emulator = static::getEmulatorInstance($scheme, $path, $this->getContext());
          if (!$emulator) {
              return false;
          }
  
          $this->setEmulator($emulator);
  
          $this->getEmulator()->setResponseStream($this->callEmulation($this->getEmulator()->getIncomingStream()));
          $this->setResponse($this->getEmulator()->getOutgoingStream());
  
          return true;
      }
docs: Open a stream.
  
  @param string $path The path for the stream.
  @return bool Whether the stream could be opened.