Câu 57: 200-550: Zend Certified PHP Engineer

Given a PHP value, which sample shows how to convert the value to JSON?

1. A. $string = json_encode($value); — đáp án hiện tại
2. B. $string = Json::encode($value);
3. C. $json = new Json($value); $string = $json->__toString();
4. D. $value = (object) $value; $string = $value->__toJson();