| Re: Undefined variable: Origin [message #174244 is a reply to message #174243] |
Sat, 28 May 2011 12:22   |
Co
Messages: 75
Registered: May 2011
Karma:
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On 28 mei, 14:08, Luuk <L...@invalid.lan> wrote:
> On 28-05-2011 14:03, Co wrote:
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>> On 28 mei, 11:57, Luuk <L...@invalid.lan> wrote:
>>> On 28-05-2011 11:41, Co wrote:
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>>>> On 28 mei, 11:34, Luuk <L...@invalid.lan> wrote:
>>>> > On 28-05-2011 11:30, Co wrote:
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>>>> >> On 28 mei, 11:17, Luuk <L...@invalid.lan> wrote:
>>>> >>> On 28-05-2011 08:51, Co wrote:
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>>>> >>>> Hi All,
>
>>>> >>>> I give two values from one php page to the next.
>>>> >>>> <a href="MembersFrom.php?myCountry=Netherlands&myFlag=nl.gif">
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>>>> >>>> On the second page I first define them:
>>>> >>>> if (isset($_GET['myCountry'])) {
>>>> >>>> $Origin = $_GET['myCountry'];
>>>> >>>> $Flag = $_GET['myFlag'];
>>>> >>>> }
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>>>> >>>> $queryString = "WHERE email_activated='1' AND country='$Origin' AND
>>>> >>>> active='1' ORDER BY id ASC";
>>>> >>>> $sql2 = mysql_query("SELECT * FROM myMembers $queryString $limit") ;
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>>>> >>>> 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";
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>>>> >>>> How should I save the value in Origin so it can be used everytime
>>>> >>>> again?
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>>>> >>>> Marco
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>>>> >>> You will need a session
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>>>> >>>http://nl2.php.net/manual/en/function.session-start.php
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>>>> >>> --
>>>> >>> Luuk
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>>>> >> Can you have more than one sessions?
>>>> >> Could you give me some example of start and end of this session?
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>>>> >> Marco
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>>>> > What is wrong with the examples at the given page?
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>>>> > --
>>>> > Luuk
>>>> I put in this code:
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>>>> session_start();
>>>> $_SESSION['Origin'] = $_GET['myCountry'];
>>>> $_SESSION['Flag'] = $_GET['myFlag'];
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>>>> //if (isset($_GET['myCountry'])) {
>>>> // $Origin = $_GET['myCountry'];
>>>> // $Flag = $_GET['myFlag'];
>>>> //}
>>>> $queryString = "WHERE email_activated='1' AND country='$Origin' AND
>>>> active='1' ORDER BY id ASC";
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>>>> 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'];
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>>> The first time you start this page $_SESSION['Origin'] will be empty
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>>> The second time it will hold the value of the previous $_GET['myCountry']
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>>> In other words,
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>>> If $_GET['myCountry'] is empty, you should not do:
>>> $_SESSION['Origin'] = $_GET['myCountry'];
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>>> --
>>> Luuk
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>> When I try your code and go to the second page I get three
>> notifications:
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>> Notice: A session had already been started - ignoring session_start()
>> Notice: Undefined index: myCountry
>> Notice: Undefined index: myFlag
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>> on these lines:
>> $_SESSION['Origin'] = $_GET['myCountry'];
>> $_SESSION['Flag'] = $_GET['myFlag'];
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> so, *why* do tou do this (quoted from your original post)
>
> if (isset($_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
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