AwsInspector\Ssh\Connection::exec PHP Method

    public function exec($command, $asUser = null)
    {
        $command = new Command($this, $command, $asUser);
        return $command->exec();
    }

 /**
  * @return $this
  * @throws \Exception
  */
 public function doRequest()
 {
     $this->responseHeaders = [];
     $this->responseBody = [];
     $command = $this->getCurlCommand();
     $result = $this->connection->exec($command);
     if ($result['returnVar'] != 0) {
         throw new \Exception('Curl error: ' . $this->getCurlError($result['returnVar']));
     }
     if (!isset($result['output'])) {
         throw new \Exception('No output found');
     }
     // the command FIRST returns the body and THEN the headers (I tried many different ways and no matter
     // what's redirected to what curl alwyas seems to dump the headers last
     $httpLine = false;
     do {
         $line = array_pop($result['output']);
         // yes, this is really ugly...
         // I wish we'd be able to separate header and body in a cleaner way
         // but we can't do this with exec(), and proc_open also doesn't make things easier
         if (preg_match('|HTTP/\\d\\.\\d\\s+(\\d+)\\s+.*|', $line, $matches)) {
             $this->setResponseCode($matches[0]);
             $httpLine = true;
             // put the rest back since it belongs to the response body
             $restOfThatLine = preg_replace('|HTTP/\\d\\.\\d\\s+(\\d+)\\s+.*|', '', $line);
             if ($restOfThatLine) {
                 array_push($result['output'], $restOfThatLine);
             }
         }
         if (!$httpLine && !empty($line)) {
             $this->parseHeader($line);
         }
     } while (!$httpLine);
     $this->responseBody = implode("\n", $result['output']);
     return $this;
 }