bool http\Env::setResponseHeader(string $header_name[, mixed $header_value = NULL[, int $response_code = 0[, bool $replace = true]]])Set a response header, either replacing a prior set header, or appending the new header value, depending on $replace.
If no $header_value is specified, or $header_value is NULL, then a previously set header with the same key will be deleted from the list.
If $response_code is not 0, the response status code is updated accordingly.
string $header_name#, the name of the response header.mixed $header_value#, the header value.int $response_code#, any HTTP response status code to set.bool $replace#, whether to replace a previously set response header with the same name.bool Success.