Fsockopen() documentation

In the documentation it states: As of PHP 4.3.0, if you have compiled in OpenSSL support, you may prefix the hostname with either 'ssl://' or 'tls://' to use an SSL or TLS client connection over TCP/IP to connect to the remote host. However, I can not find a copy of PHP 4.3.0 anywhere. Is this a typo? Should it read 4.0.3? Anyhow, I'm trying to establish a secure connection to authorized.net via socket for a Credit Card approval. Can't seem to get things working using port 443 and the 'ssl://' protocol syntax as the documentation suggests. An I doing it wrong or is the documentation predicting the future? Great work on PHP! Thanks, Brian Weil