Very Odd Session Array Problem

[Aaron Axelsen <lists@xxxxxxxxxxxx>]

We have the chunk of code at the bottom of the page.  It is behaving 
very strangly under php 4.3.9.  Basically, if it is not coded exactly as 
listed below, it will not work right.  The development server is running 
5.0.3, and it works fine.  However, the live server has 4.3.9.  Is there 
something vastly different with arrays and session variables?

       $key = $_REQUEST['quote'];
       $quotes = $_SESSION['quotes'][$key];
       //unset($_SESSION['quotes'][$key]);
       $doc = $file_array[$key];
      
       // handle a new quantity request
       if(isset($_REQUEST['qty']) && 
preg_match('/^\d+$/',$_REQUEST['qty']))
       {
           if(!(is_array($quotes)))
               $quotes = array();

           //print $_REQUEST['qty'];
           $found = false;
           if(count($quotes) > 0)
           {
               foreach($quotes as $qty)
               {
                   if($qty == $_REQUEST['qty'])
                       $found = true;
               }
              
           }
          
           //print_r($quotes);
           if(!$found) {
               print "Before";
               print_r($quotes);
               array_push($quotes, $_REQUEST['qty']);
               print "After";
               print_r($quotes);
               $quoteString = implode(",",$quotes);
               $_SESSION['quotes'][$key] = explode(",",$quoteString);
           } else {
               $quoteString = implode(",",$quotes);
               $_SESSION['quotes'][$key] = explode(",",$quoteString);
           }
           //print_r($quotes);
          
           //sort($quotes);
           //print_r($quotes);
           //print_r($_SESSION['quotes'][$key]);
           //$_SESSION['quotes'][$key] = array();
           //$quotes = $_SESSION['quotes'][$key];
           print "Session";
           print_r($_SESSION['quotes'][$key]);

--
Aaron Axelsen
lists@xxxxxxxxxxxx

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