PHP for Enterprise Applications

As the implementation language for a vast space of the applications through out the web, PHP still finding a proper place in the enterprise space. Can PHP go beyond the conventional web based database back-ended applications?. Can I use public data sources to help my finical decisions?. Can I use PHP to communicate with other enterprises?. Can my PHP CRMs, CMSes interact with each other?. Can I make these interactions secure and reliable?.
Yes. Certainly you can. Now PHP is enterprise ready with WSF/PHP toolkit.