[SOLVED] Retreiving objects from Sessions

[villeit]

Hi all,

 

I am getting really frustrated with storing and retreiving objects from a session. But it may be because of my lack of knowledge in sessions 

First some system specs:

 

OS - Vista Home 32bit

Webserver - IIS 7

PHP - PHP 5.2.11

 

php.ini

session.auto_start = 1

 

So, when I decide to store an object array in the session, it works just fine. I can also retrieve it from the session but with an extra attribute mentioning: "__PHP_Incomplete_Class_Name" with the value of the Object Name.

 

Code when I try to retrieve object from session:

 

$hits = $_SESSION['hitsArray']; // Array of MyObject
AMethodThatDoesSomething($hits[0]); // Requires MyObject Type

 

And this is where it fails:

I get following information in the debugger:

 

 

__PHP_Incomplete_Class_Name | MyObject

Attribute 1                            | A value

Attribute 2                            | Another Value

....And so on....

 

 

Ok, so I did some research and found out objects do not work if you have "session.auto_start = 1" in php.ini 

AND that you need to add following line above your session_start():

 

 
require_once("MyObject.php");
session_start();
header("Cache-control: private"); 
session_register('hitsArray'); // Array of MyObject
$_SESSION['hitsArray'] = $hits; // Store into session

 

So, I changed "session.auto_start = 0" in php.ini and added the required line above. Well then it didn't even store my object array in the session in the first place!

 

Now I feel that I am stumbling in the dark and hope for someone to be able to help me in my ordeal!

[MadTechie]

How are you setting the object to the session ?

 

ie

 

session_start();
header("Cache-control: private");
require_once("MyObject.php");
$obj = new myObject();

$_SESSION['hitsArray'] = $obj->hits; // Store into session
echo $_SESSION['hitsArray'][0];

[villeit]

The "$hits" variable is an array of MyObject.

So I am essentially inserting the whole array of objects into the Session variable.. .

 

        
function SaveToSession($hits){
          session_start();
          header("Cache-control: private"); //IE 6 Fix
          require_once("tiers/Person.php");
          session_register('hitsArray');
          $_SESSION['hitsArray'] = $hits; // Save hits into session    
        }

[MadTechie]

That doesn't help much as your passing $hits to a function that sets it to a session..

 

which is as useful as saying theirs a problem with this line

$_SESSION['hitsArray'] = $hits;

 

I would really need more info or an example.

 

also remove session_register

session_register

This function has been DEPRECATED as of PHP 5.3.0 and REMOVED as of PHP 6.0.0. Relying on this feature is highly discouraged.

[villeit]

Ok, the reason I am putting  an array of hits into a session is that I can easily delete after I have displayed a hitlist to the user. From that hitlist user is able to select a row for deletion. When the page is posted for deletion, I will retrieve the array from the Session and delete the expected index.

 

 

        
        // Check that the search form has been submitted
        if (isset($_POST['search'])) {

          // After user has clicked submit
          $firstName = $_POST['fnamn'];
          $lastName = $_POST['enamn'];
          // Create a query object
          $query = new Query($firstName, $lastName);
          $bl = new BL();

          // Returns an array of person
          $hits = $bl->FindPerson($query);
          if(count($hits) < 1){
            echo "<p>Tyvärr, inga träffar på din sökning.</p><br>";
          }else{
            SaveToSession($hits);
            DisplayResults($hits);
          }
        }
        // Check that the erase form has been submitted
        if (isset($_POST['erase'])) {
            // Get index to delete
            $index = $_POST['radiobutton'];
            // retrieve persons from session
            $hits = $_SESSION['hitsArray'];
            $bl = new BL();
            // Pass person for deletion
            $result = $bl->ErasePerson($hits[$index]); // Erase the selected person
            echo "Deletion happened: " . $result;
        }

[PFMaBiSmAd]

Have you even determined that sessions are working for any $_SESSION variable? Then go onto the next step of storing an object in one.

[villeit]

ok I solved it now with serialization. Its not ideal, but at least it works!

 

// Serialize

          $serializedhits = serialize($hits);

          session_start();

          header("Cache-control: private"); //IE 6 Fix

          $_SESSION['hitsarray'] = $serializedhits; // Save hits into session

// Unserialize

            $hits = $_SESSION['hitsarray']; // Person array from Session

            $hitsFromSess = unserialize($hits);

            unset($_SESSION['hitsarray']); // Delete session variable

 

Its a bit of shame that you can´t store objects straight into a session even if you have the session.auto_start = 1 in php.ini

 

Or maybe its just me having this problem

 

 

[MadTechie]

Technically any data in a session is serialized