date time issue, this issue was eating my brain since last month and the solution was very simple.
actuallly when logged in user directly approaches to table_2.php page it sends booking command (doesnt matter whether booking date time session available or not ). and entry reaches as blank entry.

well we've to check if session['booking_date'] variable exist....
if it exist continue the booking otherwise return to table.php page quickly. and that will resolve the problem quickly.

wallah!!

indiannightchelmsford.co.uk restaurant has the latest script in table.php and table_2.php file