libcURL - the multiprotocol file transfer library

Project URL: http://curl.haxx.se/libcurl/

All prebuilt libraries are available as part of the PHP SDK

• CURL sources, patched, available in here
• OpenSSL binaries and development files
• Libssh2 binaries and development files
• Zlib binaries and development files
• Create a clean build tree without the classic php dependencies in ..\..\deps but only the required deps (ssl and zlib). Having curl headers in your include path is likely to break the build

See https://github.com/pierrejoye/curl/blob/master/winbuild/BUILD.WINDOWS.txt