Update sessions.rst
Merge pull request #1313 from alanfgh/patch-20

Update sessions.rst
Update part-two.rst

I'm not really sure what I am doing here - i tried making a change (line 207), but it didn't show up in the preview window.
Merge pull request #1314 from basementjack/patch-1

Update part-two.rst
Use PHP comments in PHP file.

Refs #1314