Trying to fsockopen an ssl:// connection, but it was hanging for a long time, ignoring timeout parameter, and eventually returning false, without an error message.
Turns out (at least) on Windows it validates certificates and doesn't have a valid certificate store.
This worked for me:
- download Mozilla's certificate store from https://curl.haxx.se/ca/cacert.pem
- copy it inside php installation (for example: c:\php)
- and set it up in php.ini
openssl.cafile="c:\php\cacert.pem"
My system: Apache/2.4.29 (Win64) OpenSSL/1.0.2n PHP/5.6.38