php_curl does not work with IIS extended protection

[christophvw]

Description

Same issue described here:
curl/curl#12511

a workaround would be to use the Schannel Backend instead of OpenSSL:
set CURL_SSL_BACKEND=schannel
https://curl.se/libcurl/c/libcurl-env.html

But this does not work for precompiled php binaries as libcurl is statically linked.

https://support.microsoft.com/en-us/topic/description-of-the-update-that-implements-extended-protection-for-authentication-in-internet-information-services-iis-0efdf83b-2ae5-040c-5308-6cacf2e24b30?WT.mc_id=M365-MVP-6771

Would it be possible to add a php.ini setting to use a different curl backend? Or build php_curl with schannel backend on windows?
see https://curl.se/libcurl/c/curl_global_sslset.html

PHP Version

PHP 8.3.6

Operating System

Windows 11

[christophvw]

Garethp/php-ews#261

[christophvw]

curl/curl#13098

[cmb69]

See also winlibs/cURL#13.