| Re: Undefined variable: Origin [message #174249 is a reply to message #174247] |
Sat, 28 May 2011 12:42   |
Co
Messages: 75
Registered: May 2011
Karma:
|
Member |
|
|
On 28 mei, 14:37, Luuk <L...@invalid.lan> wrote:
> On 28-05-2011 14:22, Co wrote:
>
>
>
>
>
>
>
>
>
>> On 28 mei, 14:08, Luuk <L...@invalid.lan> wrote:
>>> On 28-05-2011 14:03, Co wrote:
>
>>>> On 28 mei, 11:57, Luuk <L...@invalid.lan> wrote:
>>>> > On 28-05-2011 11:41, Co wrote:
>
>>>> >> On 28 mei, 11:34, Luuk <L...@invalid.lan> wrote:
>>>> >>> On 28-05-2011 11:30, Co wrote:
>
>>>> >>>> On 28 mei, 11:17, Luuk <L...@invalid.lan> wrote:
>>>> >>>>> On 28-05-2011 08:51, Co wrote:
>
>>>> >>>>>> Hi All,
>
>>>> >>>>>> I give two values from one php page to the next.
>>>> >>>>>> <a href="MembersFrom.php?myCountry=Netherlands&myFlag=nl.gif">
>
>>>> >>>>>> On the second page I first define them:
>>>> >>>>>> if (isset($_GET['myCountry'])) {
>>>> >>>>>> $Origin = $_GET['myCountry'];
>>>> >>>>>> $Flag = $_GET['myFlag'];
>>>> >>>>>> }
>
>>>> >>>>>> $queryString = "WHERE email_activated='1' AND country='$Origin' AND
>>>> >>>>>> active='1' ORDER BY id ASC";
>>>> >>>>>> $sql2 = mysql_query("SELECT * FROM myMembers $queryString $limit") ;
>
>>>> >>>>>> I limit the data to one record per page.
>>>> >>>>>> However when I want to go to the next record on a new page he doesn't
>>>> >>>>>> recognize the variable Origin anymore in here:
>>>> >>>>>> $queryString = "WHERE email_activated='1' AND country='$Origin' AND
>>>> >>>>>> active='1' ORDER BY id ASC";
>
>>>> >>>>>> How should I save the value in Origin so it can be used everytime
>>>> >>>>>> again?
>
>>>> >>>>>> Marco
>
>>>> >>>>> You will need a session
>
>>>> >>>>>http://nl2.php.net/manual/en/function.session-start.php
>
>>>> >>>>> --
>>>> >>>>> Luuk
>
>>>> >>>> Can you have more than one sessions?
>>>> >>>> Could you give me some example of start and end of this session?
>
>>>> >>>> Marco
>
>>>> >>> What is wrong with the examples at the given page?
>
>>>> >>> --
>>>> >>> Luuk
>>>> >> I put in this code:
>
>>>> >> session_start();
>>>> >> $_SESSION['Origin'] = $_GET['myCountry'];
>>>> >> $_SESSION['Flag'] = $_GET['myFlag'];
>
>>>> >> //if (isset($_GET['myCountry'])) {
>>>> >> // $Origin = $_GET['myCountry'];
>>>> >> // $Flag = $_GET['myFlag'];
>>>> >> //}
>>>> >> $queryString = "WHERE email_activated='1' AND country='$Origin' AND
>>>> >> active='1' ORDER BY id ASC";
>
>>>> >> How can I give the $_SESSION['Origin'] to the query?
>>>> >> Marco
>
>>>> > try this:
>>>> > session_start();
>>>> > print "Session Origin: ".$_SESSION['Origin']."<br>";
>>>> > $_SESSION['Origin'] = $_GET['myCountry'];
>>>> > print "Session Origin replaced with value from _GET:
>>>> > ".$_SESSION['Origin']."<br>";
>>>> > $_SESSION['Flag'] = $_GET['myFlag'];
>
>>>> > The first time you start this page $_SESSION['Origin'] will be empty
>
>>>> > The second time it will hold the value of the previous $_GET['myCountry']
>
>>>> > In other words,
>
>>>> > If $_GET['myCountry'] is empty, you should not do:
>>>> > $_SESSION['Origin'] = $_GET['myCountry'];
>
>>>> > --
>>>> > Luuk
>
>>>> When I try your code and go to the second page I get three
>>>> notifications:
>
>>>> Notice: A session had already been started - ignoring session_start()
>>>> Notice: Undefined index: myCountry
>>>> Notice: Undefined index: myFlag
>
>>>> on these lines:
>>>> $_SESSION['Origin'] = $_GET['myCountry'];
>>>> $_SESSION['Flag'] = $_GET['myFlag'];
>
>>> so, *why* do tou do this (quoted from your original post)
>
>>> if (isset($_GET['myCountry'])) {
>>> $Origin = $_GET['myCountry'];
>>> $Flag = $_GET['myFlag'];
>
>>> }
>
>>> Question: Do you want to learn programming, or just want to learn how to
>>> copy/paste ?
>
>>> --
>>> Luuk
>
>> I did that because i got the warning for unidentified variable.
>> Of course I want to learn how to program but what use is it if it
>> doesn't work.
>
>> The point is that I have to take to variables from my main page.
>> Country and flag.
>> MembersFrom.php?myCountry=Netherlands&myFlag=nl.gif
>> In the record form I want to show all members from Country X and show
>> their flag Y.
>> This works with what I used in the beginning. However if I go to the
>> next record (next page)
>> the values get lost.
>> So I need to store the values somewhere if I load :
>> MembersFrom.php?pn=2
>
>> Marco
>
> That was your question in the first place
>
> i answered that you could use sessions to do that
>
> in your first page 'MembersFrom.php' you store 'myCountry' in a session
> variable:
> $_SESSION['Origin'] = $_GET['myCountry'];
>
> and in you second page, after the session started, you can acces the
> values again via the variable $_SESSION['Origin']
>
> session_start();
> if (isset($_GET['myCountry'])) {
> // Get values if they are defined in the URL
> $Origin = $_GET['myCountry'];
> // and store them in the session
> $_SESSION['Origin'] = $Origin;} else {
>
> // Get the value from the session
> $Origin = $_SESSION['Origin'];
>
> }
>
> --
> Luuk
Luuk,
I do understand that but it still gives me this warning that a session
has already started.
A session starts when I open the index.php and the checkusrlog.php is
run.
Marco
|
|
|
|
Calendar
Search
Help
Members
Register
Login
Home
]