Andre,
My note on decision lines was in anticipation of your next question/problem
of "How do I handle things if the user doesn't fill in his name, address,
whatever?" My solution is check to see if the cell is filled and if not
then quit the database storage and tell the person to fill in the info. I
first check to see if the data is set and if not, send a message. This
would come before wasting your time storing anything. There are many other
methods to check user input but I learned the if (!isset($something)) die()
method first, and to me it's the most straight forward.
Hope this helps,
Hugh
----- Original Message -----
From: "Andre Dubuc" <[EMAIL PROTECTED]>
To: "Erik Price" <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>
Sent: Tuesday, March 05, 2002 4:56 PM
Subject: Re: [PHP] Is there a "GoTo Page" Function?
> On Tuesday 05 March 2002 19:20, you wrote:
> > On Tuesday, March 5, 2002, at 07:01 PM, Andre Dubuc wrote:
> > > Now that makes sense. I'm getting a better idea of how it works
> > > together. I
> > > figured there must be a way to control the "Submit" button's
behaviour,
> > > but I
> > > didn't know where to look.
> >
> > Yep, the submit input tells the form "go do your thing", but the form
> > already knew where to go (because you specify where to go in the
> > 'action' attribute). The form also knows how to go -- whether it should
> > be POST or GET. Without realizing it, you'll be learning more about the
> > HTTP protocol itself as you start writing scripts that take advantage of
> > its features.
> >
> > > Where would you insert:
> > >
> > > if (!isset($name)) die ("You need to fill in your name. Use the
> > > browser's
> > > back button and input this information.");
> > >
> > > I tried in the php database storage code (didn't work). Tried it after
> > > the
> > > appropriate 'Name' code in the form's html document. Didn't work. I
know
> > > that it should work somewhere . . . .
> > >
> > > Somehow, I don't think the "Submit" function is working as it should
> > > (especially if a carriage return or "Enter" can override everything).
Is
> > > there some code that will defeat this undesirable activity?
> >
> > Firstly, your browser is what determines how the form is sent -- but
> > usually, it's normal for the Enter key to act as the "Submit" button (a
> > nice keyboard shortcut that I take advantage myself). It should not act
> > in this fashion if you are typing into a textarea tag, because you might
> > want to enter newlines/cr's in the textarea, but for most other form
> > fields it's normal. If you want to jump from one field to the next with
> > a key press, use tab.
> >
> > Secondly, you're wondering where to check for the presence of the data?
> > How about this:
> >
> > <?php
> > function print_name_form()
> > {
> > print "<p><input type=\"text\" name=\"name\" /></p>";
> > }
> >
> > if (!$_POST['name']) {
> > print "<p>You need to fill in your name.</p>";
> > print_name_form();
> > } else {
> > print "<p>Thank you!</p>";
> > }
> > ?>
> >
> > Why did I define a function in the beginning? Well, this way, if the
> > user didn't enter a name, they don't have to hit "back" in their
> > browser. The form just appears again. This is much more useful if you
> > have this same function accessible from each page/script you are
> > writing, so that you don't have to waste your time. Later, when you
> > learn how to check for errors in your user's input (such as if the user
> > entered a bunch of numbers instead of a name), this will come in handy
> > so that you can save the user's legitimate values but ask them to
> > re-enter their invalid values. That gets kind of technical, but it's
> > one of the sweet things about functions, that they are reuseable.
> >
> > Erik
> >
>
> Hi Erik,
>
> And thanks again!
> I like the 'function print_name_form()' -- I gather you could do this for
all
> the NOT NULL variables that a form requires. Further, would you just
change
> the "print_name" to 'print_whatever-other-variable' that I would want to
> check? Is there another way to consolidate the code at this point? Or
would I
> just duplicate the code for each not-null variable?
>
> [Btw, I sometimes long for the old Paradox PAL code that seemed so
difficult
> at the time I learnt it -- PHP is very similar, but the syntax seems so
much
> more compact.]
>
> While we're on the topic of fields ('input type=text") is there anyway to
> include a non-printing space in the data entry, say for 'Name", that would
> not be passed to the database? Thus, on the screen it would appear:
>
> Name: [non-printing space]Andre but in the database entry: Name:Andre
>
> This isn't a pressing question, and probably is a formatting question, but
I
> wonder if it's possible?
>
> Tia,
> Andre
> >
> > ----
> >
> > Erik Price
> > Web Developer Temp
> > Media Lab, H.H. Brown
> > [EMAIL PROTECTED]
>
> --
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>
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>
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