PHP: Session 2-Dimensional Array - Track Viewed Products

I'm trying to create an array to display the last 5 products a customer has viewed.

The array is a 2 dimensional array like below...
$RView= array(
array( ID => "1001", RefCode => "Ref_01", Name => "Name_01" ),
...
array( ID => "1005", RefCode => "Ref_05", Name => "Name_05" )
);

The array values are retrieved from the products recordset and is designed to function as follows when a customer visits a product page.

1. Page will check if a Session Array exists.
2a. If yes, an array variable is created from existing Session.
2b. If no, a new array is created.
3. Array will add the new product details.
4. Array will count if there are more than 5 existing products in the array.
5a. If yes, it will remove the oldest.
5b. If no, moves to step 6.
6. A Session is created/updated from the revised Array.

My current effort is attached below...
Many thanks for any help.

<?php 
    session_start() 
    // Get or Create Array
    IF (isset($_SESSION['sessRView'])) {
    $RView = ($_SESSION['sessRView']); } 
    ELSE {
    $RView = array(array()); 
    }

    // Append currently viewed Product to Array
    array(array_unshift($RView, $row_rsPrd['PrdID'], $row_rsPrd['RefCode'], $row_rsPrd['Name']));

    // Check if more than 5 products exist in Array, if so delete.
    IF (sizeof($RView) > 5) {
    array(array_pop($RView)); }

    // Update Session for next page
    $_SESSION['sessRView'] = $RView;

    // Display Array
    for ($row = 0; $row < 5; $row++)
    {
    echo "<ul>";
        echo "<li><a href='?PrdID=".$RView[$row]["PrdID"]."'>".$RView[$row]["RefCode"]."</a> : ".$RView[$row]["Name"]."</li>";
    echo "</ul>";
    }
?>

Code (markup):

 

My problem was solved with the following function used instead of my original code.
Thanks to "kkeith29" over at daniweb

Here's the code if it helps anyone in future.

<?php

session_start();

function addProductToSession( $id,$code,$name ) {
	$recView =& $_SESSION['recently_viewed'];
	if ( count( $recView ) == 5 ) {
		array_shift( $recView );
	}
	$recView[] = array( $id,$code,$name );
}

function getRecentlyViewedProducts() {
	$ul = "<ul>\n";
	foreach( $_SESSION['recently_viewed'] as $data ) {
		list( $id,$code,$name ) = array_values( $data );
		$ul .= "\t<li><a href=\"?PrdID={$id}\">{$code}</a> : {$name}</li>\n";
	}
	$ul .= "</ul>";
	echo $ul;
}

//Query database for product info
//The $row_rsPrd is from the database result

addProductToSession( $row_rsPrd['PrdID'], $row_rsPrd['RefCode'], $row_rsPrd['Name'] );

getRecentlyViewedProducts();

?>

Code (markup):