| Re: Undefined variable: Origin [message #174243 is a reply to message #174241] |
Sat, 28 May 2011 12:08   |
Luuk
Messages: 329
Registered: September 2010
Karma:
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Senior Member |
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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
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