isEmpty() абстрактный публичный Метод

Returns if the document is empty or already contains data.
abstract public isEmpty ( ) : boolean
Результат boolean
Пример #1
0
 /**
  * Visit struct returned by controllers.
  *
  * @param mixed $data
  *
  * @return \Symfony\Component\HttpFoundation\Response
  */
 public function visit($data)
 {
     $this->generator->reset();
     $this->generator->startDocument($data);
     $this->visitValueObject($data);
     //@todo Needs refactoring!
     // A hackish solution to enable outer visitors to disable setting
     // of certain headers in inner visitors, for example Accept-Patch header
     // which is valid in GET/POST/PATCH for a resource, but must not appear
     // in the list of resources
     foreach ($this->response->headers->all() as $headerName => $headerValue) {
         if ($headerValue[0] === false) {
             $this->response->headers->remove($headerName);
         }
     }
     $response = clone $this->response;
     $response->setContent($this->generator->isEmpty() ? null : $this->generator->endDocument($data));
     // reset the inner response
     $this->response = new Response(null, 200);
     $this->statusCode = null;
     return $response;
 }