(PECL pecl_http >= 0.10.0)
http_send_content_type — Send Content-Type
Send the Content-Type of the sent entity.
Note: 이 함수는 다음 함수와 함께 사용해야 합니다: http_send_data(), http_seld_file() 그리고 http_send_stream().
the desired content type (primary/secondary)
성공할 경우 TRUE를, 실패할 경우 FALSE를 반환합니다.
Raises an E_WARNING when the content_type doesn't seem to contain a primary and a secondary part.