Does anyone know if it is possible, actually if it has been done, to serialize an object in php and unserialize it in Java (java-php communication). Maybe an adapter will be
Like previous answers have mentioned, I would avoid PHP object serialization if possible. Use JSON (which is actually faster than serialize() in PHP), thrift or some other format that is more universal.
If you have no choice I have been working on a Jackson Module to enable reading and writing serialized PHP from Java. Jackson is a great JSON parser and since PHP serialization format is pretty similar it seemed like a good fit. It's not quite complete yet (writing is still a work in progress).