(default) TLS 1.2 recommended if TLS 1.2 everything is set
forced by CURL_SSLVERSION_TLSv1_2 TLS 1.2 if warning before, your PHP version is obsolete, better go to 5.6.
forced by 6 TLS 1.2 if succeed, your hosting is really bad but can cope with (require code adjustment)


If none of the abose display TLS1.2, your hosting is not TLS1.2 compatible. (change hoster)