SSL error SSL3_GET_SERVER_CERTIFICATE:certificate verify failed

Question

After upgrading to PHP 5.6 I get an error when trying to connect to a server via fsockopen()..

The certificate on the server (host) is self-signed

Answer 1

Firstable, make sure that you Antivirus software doesn't block SSL2.
Because I could not solve a problem for a long time and only disabling the antivirus helped me