On Thu, Jul 9, 2026, at 18:07, Jorg Sowa wrote: > While [rejecting newlines in cURL headers] would be a useful improvement, it > introduces BC concerns. I would prefer to see this change go through a > deprecation phase first, so we can avoid unexpectedly breaking existing user > implementations.
Thank you for your feedback. It seems to me that this is exactly a case where this policy applies: https://wiki.php.net/rfc/policy-exempt-type-value-error-bc-policy I asked Daniel Stenberg about whether newlines are allowed in headers, and he said: > The documentation says in clear terms: > > The headers included in the linked list must not be CRLF-terminated > > I believe libcurl might change its treatment of them in a future and start > returning error earlier when such octets are found. Regards, Sjoerd
