In a new post to her blog Zoe Slattery points out a big step in PHP's presence in systems all around the world - the inclusion of it into the CISC systems.
You probably don't realise it but it's very likely that sometime during the last week you will have have used IBM's CICS technology. [...] Last week PHP made it into CICS, PHP is now being used to build agile front ends and RESTful interfaces for the technology that underpins most of the world's large scale commercial systems. You don't get much more into The Enterprise than that!
IBM made the announcement back on Friday the 12th about the upgrade to the sMash WebSphere software. The update, a SupportPac lets developers run PHP inside of a CICS transaction and can be used to create REST services other applications/interfaces can use to directly communicate with the CICS system.