| Re: Parameter passing question [message #173554 is a reply to message #173552] |
Mon, 18 April 2011 19:21   |
Denis McMahon
Messages: 634
Registered: September 2010
Karma:
|
Senior Member |
|
|
On Mon, 18 Apr 2011 15:11:10 -0400, sheldonlg wrote:
> On 4/18/2011 2:20 PM, Chuck Lavin wrote:
>> This is not a homework assignment. I'm working on a live remote server
>> that I'd rather not be playing around with.
>>
>> According to the PHP doc page for isset(), isset() can't tell the
>> difference between a variable that's not set and a variable that's
>> empty.
>>
>> I need to move passed parameters into session variables:
>>
>> 1) If a parameter is passed with a value, set the session variable with
>> that value;
>>
>> 2) If a parameter is passed with an empty value, get rid of that
>> session variable;
>>
>> 3) If a parameter is not passed at all (not referenced in the URL),
>> don't touch the session variable.
>>
>> And right now I can't tell the difference between a parameter being
>> passed empty and no parameter being passed at all.
>
> Uh, why do you care? If it is passed empty, then you get rid of it with
> unset($_SESSION['the variable']. If it is not passed at all, and it
> should have been if not empty, then do the unset as well. If it hadn't
> been set, nothing happens.
>
> So, why do care about the difference?
Uh, I think his requirement is:
If the param is set and empty, set session value to an empty string
If the param is set and contains data, set session value to data
If the param is not present, used a stored session value if one is present
I'm not sure what he wants to do if the param is not present and there's
no stored session param, but I assumed he'd accept an empty string in
that case too.
Rgds
Denis McMahon
|
|
|
|
Calendar
Search
Help
Members
Register
Login
Home
]