Add to Cart functions

[bullbreed]

Hi Guys

 

I have a page on my website that enables a customer to select a product, choose a colour and a size, create some custom text then send that data to my cart.php page. I'm not sure if I am doing this the correct way and haven't done a cart before.

 

This form collects the data then posts it to the cart.php page

 

<form action="cart.php" method="POST">

<input type="hidden" name="category" id="category" value="<?php echo $_GET['cid']; ?>" />
<input type="hidden" name="name" id="name" value="<?php echo $_GET['nid']; ?>" />
<input type="hidden" name="colour" id="colour" value="<?php echo $_GET['colid']; ?>"  />
<input type="hidden" name="input" id="input" value="<?php echo $_POST['input']; ?>"  />
<input type="hidden" name="fontselect" id="fontselect" value="<?php echo $_POST['fontselect']; ?>"  />
<input type="hidden" name="sizeselect" id="sizeselect" value="<?php echo $_POST['sizeselect']; ?>"  />

<div class="textinputgo"><input name="cart" type="submit" id="cart" value="Add to Cart" /></div>

</form>

 

This is the cart.php page which displays the product selections on the page;

( I have used tables for now but will change these to divs.)

 

<h1>Shopping Cart</h1>
<?php

$submit = ($_POST['cart']);

if (!isset($submit)){
echo 'Your cart is empty';
}else {

//Form data
$category = ($_POST['category']);
$name = ($_POST['name']);
$colour = ($_POST['colour']);
$text = ($_POST['input']);
$font = ($_POST['fontselect']);
$size = ($_POST['sizeselect']);

if (isset($submit)){

// This page displays the contents of the shopping cart.
        
        // Create a table and a form.
echo '<table border="1" width="90%" cellspacing="3" cellpadding="3" align="left">

        <tr>
                <td align="left" width="15%"><b>Category</b></td>
                <td align="left" width="15%"><b>Name</b></td>
                <td align="left" width="15%"><b>Colour</b></td>
                <td align="left" width="15%"><b>Text</b></td>
                <td align="left" width="10%"><b>Font</b></td>
                <td align="left" width="15%"><b>Size</b></td>
        </tr>
';

echo '<tr>';
echo '<td align="left">' . $category . '</td>';
echo '<td align="left">' . $name . '</td>';
echo '<td align="left">' . $colour . '</td>';
echo '<td align="left">' . $text . '</td>';
echo '<td align="left">' . $font . '</td>';
echo '<td align="left">' . $size . '</td>';
echo '</tr>';

echo '</table>';
}
}

?>

 

My questions are;

 

1. How do I add the facility to increse the quantity of the products on the cart.php page?

 

2. If I go to another page then click on cart again the cart is empty so how do I keep the info in the cart? I'm assuming some sort of session but dont know how to do these.

 

Thanks guyz

[ignace]

1. How do I add the facility to increse the quantity of the products on the cart.php page?

 

name="products[$ID]" then when the user presses UPDATE you go over each item and check if the quantity has changed if it did then modify it in your database.

 

2. If I go to another page then click on cart again the cart is empty so how do I keep the info in the cart? I'm assuming some sort of session but dont know how to do these.

 

$_SESSION['cart_namespace'][$productID] = $row;

[bullbreed]

I'm sorry but im very new to php and dont understand  :-\

Could you explain a little more please

[ignace]

$result = mysql_query("SELECT * FROM cart WHERE session_id = $sid OR user_id = $uid");

$products = array();
while ($row = mysql_fetch_assoc($result)) {
    $products[$row['id']] = $row;
    echo '<input type="text" name="product[', $row['id'], ']" value="', $row['quantity'], '">';
}

//..
if (isset($_POST['product']) && is_array($_POST['product'])) {
    foreach ($_POST['product'] as $id => $quantity) {
        $id = intval($id);
        $quantity = intval($quantity);
        if (isset($products[$id])) {
            if ($quantity <= 0) {
                mysql_query("DELETE FROM table WHERE user_id = $uid AND id = $id");
            } else if ($quantity != $products[$id]['quantity']) {
                mysql_query("UPDATE table SET quantity = $quantity WHERE id = $id");
            }
        }
    }
}