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problems with setting sessions via post, keeps overwriting and clearing

Hi

(not really sure if my ideas are safe or the best way so expert guidance would be very well received)
 
I'm trying to set session values using a post to a controller page that basically receives all the post commands then send the page on (bit like struts in Java)

foreach ($_POST as $var => $val) {
      $_SESSION[$var] = $val;
}


My forms pages contain form input elements such as:
  <input type="hidden" name="details[thisFund]" value="ctx" />
  <input type="hidden" name="details[thisAction]" value="_details" />

Which would create sessions such as:
$_SESSION['details']['thisFund']
$_SESSION['details']['thisAction']

All seems to work ok, but if the post gets another value such as
 <input type="hidden" name="details[name]" value="neil" />
this would erase all my current details[xxx][xxx] sessions.

Can someone advise me how to perhaps
1) check if the session exists first
2) if that particular one such as name[xx][xx] does already exist over write just that one
3) if the base exists e.g. name as a session just append it

Hope that makes sense, basically add if not there, amend if it is

Asking for your wisdom mighty ones!

Neil
0
Neil Thompson
Asked:
Neil Thompson
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1 Solution
 
hernst42Commented:
You can use this function to merge the arrays without overwriding.

See http://www.php.net/session for more about sessions
function merge(&$dst, $src) {
    if (!is_array($src)) {
        $dst = $src;
        return;
    }
    foreach($src as $k => $v) {
        merge($dst[$k], $v);
    }
}
 
$_SESSION = array();
$_POST1 = array('details' => array('a' => 'a', 'b' => 'b'));
$_POST2 = array('details' => array('c' => 'c'));
 
merge($_SESSION, $_POST1);
merge($_SESSION, $_POST2);
 
var_dump($_SESSION);

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0
 
Neil ThompsonSenior Systems DeveloperAuthor Commented:
Hi

I've tried your example using:

function merge(&$dst, $src) {
    if (!is_array($src)) {
        $dst = $src;
        return;
    }
    foreach($src as $k => $v) {
        merge($dst[$k], $v);
    }
}
 
$_SESSION = array();
merge($_SESSION, $_POST);

And they didnt appear to set, am I doing it wrong?
Neil
0
 
hernst42Commented:
don't clear $_SESSION. init $_SESSION on the first page, then make sure you have always
session_start() called before you merge the infos on the following pages.

it was in my example just for init the variable.
0
 
Neil ThompsonSenior Systems DeveloperAuthor Commented:
Sorry, I'm bit of a cut and paster!
Many thanks
Neil
0

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