It's like this:
I have a form. It is generated by some PHP. It contains two items. One
is a SELECT MULTIPLE list of sites. The list of elements (sites) is held
in a PHP array. (imagine Cork, Galway, Dublin, Kerry, etc).
The other item is a SELECT (not multiple) drop down box with a list of
regions. (Imagine Connaught, Leinster, Munster, etc). I don't mind how
Each region is related to one or more sites. I'd like the user to be
able to choose a region from the drop down box, and have it
automatically select the relevant elements from the SELECT MULTIPLE.
(Imagine selecting "Munster" highlights Cork and Kerry).
This is easy to do in isolation; dump the region->site mapping in a
calls a function; the function highlights the necessary elements in the
SELECT MULTIPLE. However.
In order for PHP to parse the results of the SELECT MULTIPLE after it's
submitted, the variable name needs to end with . That's great; PHP
will take each selected element and plant them as consecutive elements
in an array. But that makes for quite messy code when trying to link the
refer to the SELECT MULTIPLE by name because of the brackets, so I have
to refer to it by its location in the form.
So I can get it working, but if I change it, it all goes to hell very
quickly. And I'd like to be able to add arbitrary sites and regions
without rewriting the code. That is, I'd like an array or database that
says "Leinster means Dublin,Kildare; Connaught means Galway; Muster
means Cork,Kerry" and gets that info into the code without getting
bogged down in making me calculate array indices. Does anyone have some
code that will do this?
If the description is clear as mud, let me know and I'll plant up a page
with the working model - it might ring a few bells.
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