This is a good article for the differences:
<a href="http://nikic.github.com/2012/07/10/What-PHP-5-5-might-look-like.html" rel="nofollow">http://nikic.github.com/2012/07/10/What-PHP-5-5-might-look-l...</a><p>* New finally keyword
* Support For list In foreach Construct
* Password Hashing API
* Generators
* Scalar typehinting
* Getters and Setters