3v4l.org - online PHP shell, execute code in 100+ different PHP versions!

based on Nkvs9
Output for 5.1.0 - 5.5.1
AABC
Output for 5.0.0 - 5.0.5
Fatal error: Class 'RecursiveArrayIterator' not found in /in/O6Z6u on line 3
Process exited with code 255.
Output for 4.3.1 - 4.4.9
Fatal error: Cannot instantiate non-existent class: recursiveiteratoriterator in /in/O6Z6u on line 3
Process exited with code 255.