PHP: Session based RAM

Here is a session based RAM.

<?
/**
 * @Class: CContainerManager.class.php
 * @Author: Abhishek Kumar (c) 2008.
**/ 

class ContainerManager 
{
 function __construct()
 {
  session_start();
  Get();  
 }
 
 function Get()
 {
  global $Container;
  $Container = array(); 
   
  if (isset($_SESSION['RAM'])) 
  {
   $Container = unserialize($_SESSION['RAM']); 
  }
 }
 
 function Set()
 {
  $_SESSION['RAM'] = serialize($GLOBALS['Container']); 
 }
 
 function Clean()
 {
  if (isset($_SESSION['RAM'])) 
  {
   unset($_SESSION['RAM']);
   unset($GLOBALS['Container']);
  }
 }
 
 function Add($Associate, $Value)
 {
  global $Container;
  if (!isset($Container[$Associate])) 
  {
   $Container[$Associate] = $Value;
   return true;
  }
  else
  {
   return false;
  }  
 }
 
 function Modify($Associate, $Value)
 {
  global $Container;
  if (isset($Container[$Associate])) 
  {
   $Container[$Associate] = $Value;
   return true;
  }
  else
  {
   return false;
  }  
 }
 
 function Delete($Associate)
 {
  global $Container;
  if (isset($Container[$Associate])) 
  {
   unset($Container[$Associate]);
   return true;
  }
  else
  {
   return false;
  }  
 }
}

/*
$V002O = new CContainerManager();

$V002O->Add('kid','hello');
$V002O->Add('kid1','hello1');
$V002O->Add('kid2','hello2');

//$V002O->Clean();
print_r($Container);
//$V002O->Sync();
*/

?>