问题
I'm using woocommerce 2.3.13 on my development environment with paypal sandbox mode. as its not yet SSL certified so under Checkout > 'Force secure checkout' is disabled now.
but on checkout page its still showing "SSL connect error" while trying to connect to paypal sandbox.
Is anyone face the same issue?
Thanks for help in advance.
回答1:
Paypal have recently rolled out some security updates on the sandbox (production will be updated in June) https://devblog.paypal.com/upcoming-security-changes-notice/
Most importantly, TLS 1.0 and 1.1 are no longer accepted by the sandbox, so you'll need to make sure that TLS 1.2 is being used by forcing the curl option, e.g:
$curl->setOption(CURLOPT_SSLVERSION,6);
You'll need OpenSSL 1.0.1+ for this to work. You can wait for woocommerce to release a patch themselves, or perhaps try updating to PHP 5.5.19+ and (lib)curl 7.34+ so that the "common encryption algorithm" handshake can find TLS 1.2 and use it automatically, but I haven't tested that yet.
来源：https://stackoverflow.com/questions/35069397/ssl-connect-error-in-woocommerce-though-force-secure-checkout-is-disabled