PHP - So close, but yet so far.

gistfile1.txt

$ python  
Python 2.7.5 (default, Oct 21 2013, 17:28:33) 
[GCC 4.2.1 Compatible Apple LLVM 4.2 (clang-425.0.28)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
[>>> [1, 3, 5] + [345, 6]
[1, 3, 5, 345, 6]
>>> 

$ php -a
Interactive shell

php > [1, 3, 5] + [345, 6];
php > var_dump( [1, 3, 5] + [345, 6]);
array(3) {
  [0] =>
  int(1)
  [1] =>
  int(3)
  [2] =>
  int(5)
}

You probably want this:

Boris, A tiny, but robust REPL for PHP.
https://github.com/d11wtq/boris