On Wed, 21 Sep 2016, Nima Sadjadi wrote:

> In order that cURL can verify ssl either using native CA bundle or with
> provided CA bundle, openssl extension is required? or cURL does not need
> openssl extension at all in any way?

I assume "openssl extension" in this context is the OpenSSL extension for PHP?
Then no, that's not used at all by curl afaik.

libcurl itself, the underlying library that powers PHP/CURL, is built to use a
TLS library and that library is very often OpenSSL.

-- 
  / daniel.haxx.se
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