Problems with counter across pages

[Marc]

Hello,

This is a simple thing but somehow I can't work it :((((

I have a self-submitting form displaying data from a database. To keep
track which data to show I want to create a variable that keeps track
how many times the page is visited.

The idea is:
first call to page:var is not set => set var=0,
subsequent calls:
depending on the way the page was called* add or subract 1 from var
(provided var is respectively < nrofrecords in database and < 0).

*via a submit button called 'next page' or 'previous page'

The code:
// test 1
echo"\$Submit = ".$Submit." - \$questionCount er =
".$questionCoun ter."<br>";

if($questionCou nter==NULL)
$questionCounte r=0;
elseif($Submit= ="previous page")
$questionCounte r=$questionCoun ter>0?$question Counter-1:$questionCoun ter;
elseif($Submit= ="next page')
$questionCounte r=($questionCou nter<getNumberO fQuestions($cat egory_id)-1)?$questionCou nter+1:$questio nCounter;

//test 2
echo"\$question Counter: ".$questionCoun ter."<br>";
[color=blue]
>getNumberOfQue stions($categor y_id) correctly returns amount of[/color]
questions in db;[color=blue]
>values for $Submit is set;
>first call to $questionCounte r gives ""
>second call to $questionCounte r gives 0
>session.auto_s tart=1 in php.ini[/color]

$questionCounte r never adds up. Always when I call the page via the
'next page' button the initial value of $questionCounte r ="", after
the code it's 0

What's wrong - how can I make this work?

Thanks,

Marc

[Tom Thackrey]

Re: Problems with counter across pages


On 13-Oct-2003, meelzooi2000@ya hoo.com (Marc) wrote:
[color=blue]
> I have a self-submitting form displaying data from a database. To keep
> track which data to show I want to create a variable that keeps track
> how many times the page is visited.
>
> The idea is:
> first call to page:var is not set => set var=0,
> subsequent calls:
> depending on the way the page was called* add or subract 1 from var
> (provided var is respectively < nrofrecords in database and < 0).
>
> *via a submit button called 'next page' or 'previous page'
>
> The code:
> // test 1
> echo"\$Submit = ".$Submit." - \$questionCount er =
> ".$questionCoun ter."<br>";
>
> if($questionCou nter==NULL)
> $questionCounte r=0;
> elseif($Submit= ="previous page")
> $questionCounte r=$questionCoun ter>0?$question Counter-1:$questionCoun ter;
> elseif($Submit= ="next page')
> $questionCounte r=($questionCou nter<getNumberO fQuestions($cat egory_id)-1)?$questionCou nter+1:$questio nCounter;
>
> //test 2
> echo"\$question Counter: ".$questionCoun ter."<br>";
>[color=green]
> >getNumberOfQue stions($categor y_id) correctly returns amount of[/color]
> questions in db;[color=green]
> >values for $Submit is set;
> >first call to $questionCounte r gives ""
> >second call to $questionCounte r gives 0
> >session.auto_s tart=1 in php.ini[/color]
>
> $questionCounte r never adds up. Always when I call the page via the
> 'next page' button the initial value of $questionCounte r ="", after
> the code it's 0
>
> What's wrong - how can I make this work?[/color]

The value of the counter is NOT automatically preserved between pages.
You either need to stash the value of the counter in a hidden input field
(<input type="hidden" ...) on the page or use sessions and a $_SESSION
variable.

http://www.php.net/manual/en/ref.session.php

--
Tom Thackrey

https://www.creative-light.com

tom (at) creative (dash) light (dot) com
do NOT send email to jamesbutler@wil lglen.net (it's reserved for spammers)