check this link, im not sure this is userful for you or not..
just for info.
http://books.google.co.in/books?id=Q9OP0ClTTvIC&pg=PA236&lpg=PA236&dq=if+(session_id()+%3D%3D+%22%22)+in+php+5&source=bl&ots=1E0yhfQHaO&sig=9qVWE4AtPs6W5Ed5OyYVKeYXP5o&hl=en&ei=pgApTqXMDcurrAeJp7nHBg&sa=X&oi=book_result&ct=result&resnum=7&ved=0CEYQ6AEwBg#v=onepage&q&f=false
Shanti C 106 Posting Virtuoso
karthik_ppts commented: good spot +5
Shanti C 106 Posting Virtuoso
Shanti C 106 Posting Virtuoso