In addition to (or instead of) the standard PHP functionality, SunRa provides the following:

clean and clear pythonesque syntax
line-based/indentation-sensitive syntax.
compile-time type checking & name resolution
All variables, fields, etc. must have an explicit type. All names are resolved.
enum classes
SunRa emulates Java-style enum classes.
object-oriented standard library
SunRa's standard library uses PHP's built-in functionality but provides a nice OO interface
code optimization & inlining
code (to some extent) be optimized and one-liners can be inlined