[SOLVED] PHP: Session 2-Dimensional Array - Track Viewed Products

[ticallian]

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>";
    }
?>

 

 

[laffin]

Looks okay, whats the problem?

 

[ticallian]

The problem i'm having is that I can't get any values from the array, the only thing that is being produced is a blank HTML list, that adds a new row each time the page is refreshed (Up to 5 rows).

 

I've revised the code a little since the first post.

1. array(array_unshift()) changed to array_unshift(array())

2. array(array_pop($RView)) changed to array_pop($RView)

3. for ($row = 0; $row < 5; $row++) changed to foreach ($RView as $Product)

See below for the revised version.

 

 

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

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

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

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

// Display Array
foreach ($RView as $prod) 
{
echo "<ul>";
    echo "<li><a href='?PrdID=".$prod["PrdID"]."'>".$prod["RefCode"]."</a> : ".$prod["Name"]."</li>";
echo "</ul>";
;}

 

Anyone with any ideas?

 

[ticallian]

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();

?>