[FX.php List] 1 success, one failure

[Joel Shapiro]

Just a word of caution for anyone adapting someone else's code...

using
     if (isset($myvar))
might not give you the results you expect because if $myvar is  
anywhere declared as
    $myvar = '';  // empty quotes
then
     if (isset($myvar))
would evaluate to true, even though you might expect it to be false.

     if (isset($myvar) && $myvar != '')
is probably a safer test.

If it's all your own code though, you'll probably know whether  
there's any chance that $myvar might ever be set to '', so using [if  
(isset($myvar))] might be sufficient.

-Joel


On Feb 7, 2008, at 7:58 AM, Dale Bengston wrote:

> I changed my logic from ...
>
> if ($myvar)
>
> ... to ....
>
> if (isset($myvar))
>
> Dale
>
> On Feb 7, 2008, at 9:53 AM, Bob Patin wrote:
>
>> this may be a stupid question, but is declaring variables as  
>> simple as just saying
>>
>> $myvar = 0;
>>
>> ?
>>
>> Or is there a more-accepted method of doing that, like one does  
>> for declaring an array?
>>
>> BP
>>
>>
>> On Feb 7, 2008, at 9:50 AM, Dale Bengston wrote:
>>
>>> Yes, undeclared variables got me too. That and short tages and  
>>> some old, old references to $_HTTP_SERVER_VARS that should have  
>>> been $_SERVER. The short tags and the $_HTTP_SERVER_VARS were  
>>> easy to repair with global search-and-replace. The undeclared  
>>> variables had to be done by hand.
>>>
>>> Dale
>>
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