* @param null|int $http_response_code Forces the HTTP response code to the specified value.
*/
public function header( $string, $replace = true, $http_response_code = null ) {
- if ( headers_sent() ) {
- MWDebug::warning( 'Headers already sent, should send headers earlier than ' . wfGetCaller() );
- }
+ \MediaWiki\HeaderCallback::warnIfHeadersSent();
if ( $http_response_code ) {
header( $string, $replace, $http_response_code );
} else {