--- On Mon, 12/8/08, James Crow <james@xxxxxxxxxxxxx> wrote:
> From: James Crow <james@xxxxxxxxxxxxx>
> Subject: Re: there must be better way to handle "Null" undefined variables
> To: fredsilsbee@xxxxxxxxx
> Cc: "Daniel Brown" <danbrown@xxxxxxx>, php-windows@xxxxxxxxxxxxx
> Date: Monday, December 8, 2008, 6:40 PM
> On Mon, 2008-12-08 at 10:24 -0800, Fred Silsbee wrote:
> > if you read my original post you'd see that I
> already know this!
> >
> > I even inserted code to fix the problem. The problem
> is that the
> >
> > values of the variable THE FIRST TIME are undefined as
> shown by the code I
> >
> > inserted.
> >
> > I fixed the problem for one of the variables to make
> sure I perceived the
> >
> > problem correctly not being a html guru!
> >
> > The question is again "Is there a better
> way?"
> >
> >
>
> If I write code that may be on a server I do not or can not
> control the
> php.ini settings, I check for the existence of the variable
> before I use
> it. This does increase the code size somewhat, but it makes
> the code
> more reliable as well. If you are passing values through
> HTTP Post or
> Get you will need something like this anyway to keep from
> typing the
> super global variable name every time.
>
> if (get_magic_quotes_gpc())
> {
> // this should not be needed, but
> //some sites still use get_magic_quotes_gpc
> if (array_key_exists('my_html_var', $_POST)
> $my_html_var =
> stripslashes($_POST['my_html_var']);
> }
> else
> {
> if (array_key_exists('my_html_var', $_POST)
> $my_html_var = $_POST['my_html_var'];
> }
> if (!is_set($my_html_var))
> {
> // set our variable to a known value
> $my_html_var = 'somevalue';
> }
>
> Cheers,
> James
your general concept is correct...do it the right way
I am not adhering to MY way but why isn't my fix OK?
One variable fixed...fixing the rest would cause code gloat.
I had a (flying) instrument instructor once who was famous for his teaching ability.
If I made a mistake (and I did many times) he'd tell me why so I'd learn the concept.
Thanks!
BTW is there anything you consider abrasive in my posts?
I am to the point to avoid post proliferation.
Here is only the pertinent code!
<form action="new_black_scholes.php" method="post">
<p>
Black Scholes Option Price Calculator:<br />
temp website under Redhat Fedora 9 Linux:<br />
the first 5 boxes require input(try 100. 100. .12 .1 365.):<br />
</p>
<p>
StockPrice (required):<br />
<input type="text" size="20" maxlength="40" name="StockPrice"
value="<?php
if (IsSet($StockPrice))
{
echo $StockPrice;
}
else
{
echo " ";
}
?>" />
</p>
<p>
ExercisePrice (required):<br />
<input type="text" size="20" maxlength="40" name="ExercisePrice"
value="<?php echo $ExercisePrice; ?>" />
</p>
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