Hi all,
I have a screen get_collection.php which is supposed to be used to
select something called 'data sets'. My database (the postgres database
is not the problem, PHP is) has an entity called 'data series' which has
a child entity called 'data sets'. The user is first shown a list of
all the data series. He selects a subset and pushes a submit button.
The database supplies the names of the children of the selected data
series, which are then displayed in the scrolling list called 'data sets'.
My problem is getting the various screens in my application to talk
to each other. I have another screen called edit_reference.php which
is used to edit a reference with an id re_reference_id. Midway through
this screen I want to link the reference of re_reference_id to data
series and data sets chosen by the user by following a link from
edit_reference.php to get_collection.php.
I thought I could just give re_reference_id to get_collection as an
url variable. Unfortunately, this doesn't work. Pushing the submit
button to actually select the data series of interest causes the $_GET
to be forgotten. Printing the value of re_reference_id in a hidden
inpput field -- which I thought for sure would end up in the $_POST
array when I hit the get_data_series submit button doesn't work either.
Neither does just saying $_POST['re_reference_id'] = $re_reference_id.
Probably I should be using session variables here. But I think they
will have their own problems since they will be written on
edit_reference.php, remembered long after the call to get_collections,
and may cause trouble later.
My page is
http://www.demog.berkeley.edu/~maryfran/memdev/get_collection.php?re_reference_id=74
I am going to attach the php code and hope it makes it through.
Mary Anderson
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