Question

How is it possible to serialize sub-objects to $_SESSION? Here is an example of what I’m trying:

arraytest.php:

<?php  class ArrayTest {     private $array1 = array();     public function __construct(){         $this->array1[] = 'poodle';     }     public function getarray(){         return $this->array1;     } }  class DoDoDo {    public $poop;    public function __construct(){         $poop = new ArrayTest();     }     public function foo()     {echo 'bar';} }  ?> 

Page 1:

<?php require_once('arraytest.php'); session_start(); $bob = new DoDoDo(); $_SESSION['bob'] = serialize($bob); ?> 

Page 2:

<?php require_once('arraytest.php'); session_start(); $bob = unserialize($_SESSION['bob']); $bob->foo(); print_r($bob->poop->getarray()); // This generates an error. ?> 

Somehow when I deserialize the object, the ArrayTest instance assigned to the objects’s $poop property in page 1 doesn’t exist any more, as evidenced by the fact that page 2 generates a fatal error on the marked line:

Fatal error: Call to a member function getarray() on a non-object in on line 6

Answer 1

Your problem isn’t serialization. Class dododo’s constructor has a bug. You aren’t referencing the class object, but instead are referring to a new variable ‘poop’ inside of the constructor’s namespace. You’re missing a $this->.

 class dododo{    public $poop;    public function __construct(){         $this->poop = new arraytest();     }     public function foo()     {echo 'bar';} } 

It works fine with this change.