PHP-4.0.4pl1 requires OpenSSL = 0.9.6, but PHP-4.0.5 and greater will also work with OpenSSL = 0.9.5.
In order to use the OpenSSL functions you need to install the OpenSSL package. PHP-4.0.4pl1 requires OpenSSL = 0.9.6, but PHP-4.0.5 and greater will also work with OpenSSL = 0.9.5.