note 9874 added to Verisign Payflow Pro functions

You can always vfork (backticks, exec, whatever) to call the pfpro executable. The basic idea is that that is a dangerous and stupid way to use a product for which an SDK is freely available. The problem is that Verisign's (closed source) SDK uses its own SSL implementation that conflicts with OpenSSL (and probably others) when it is linked into Apache. This is crippling both to the usefulness of the SDK and hence that of this module. You are encouraged to contact Verisign and urge them to provide a better SDK, an open-source SDK, or the implementation details so we can write our own. http://www.php.net/manual/ref.pfpro.php