以形式输入的Echo php充当具有路径的按钮

Question

I created a shopping cart button and in my shopping cart page I have a total quantity count that I echo out. I want the echo'd value to be in my Shopping Cart button, but when I try to add in my echo to the value, it doesn't work. Is there another way to structure this to get my url image, value: Shopping Cart, and the echo'd quantity to show?

My shopping Cart button:

<form class="shopcart" id="block right" action="shoppingcart.php">
    <input type="submit" class="shopcart" name="shopcart" value="Shopping Cart <?php echo $totalquantity; ?> ">
</form> 

The total quantity count:

<?php
        }

//Shopping Cart Quantity Count
if(isset($_SESSION['shopping_cart']) && is_array($_SESSION['shopping_cart'])) {
        $totalquantity = 0;
        foreach($_SESSION['shopping_cart'] AS $product) {
            $totalquantity = $totalquantity + $product['quantity'];
        }
  }
  else {
       $totalquantity = 0;
  }
  echo $totalquantity;
?>

CSS:

/*----Add to cart Button-------*/

input.shopcart  {
background-image: url(images/cart24.png);
background-color: transparent;
background-repeat: no-repeat;
background-position: 2px 5px 2px 5px;
vertical-align: middle;
width: 180px;
padding: 8px;
border-radius: 5px;
border: 1px solid #7ac9b7;
background-color: #12BDB8;
color: #F0F8FF;
font-weight: bold;
font-size: 15px;
cursor: pointer;
float: right;
text-align: center;
margin: 0px auto;
margin-top: -45px;
}
.shopcart:hover  {
    background-color: #10A8A3;
}

Is there a better approach to this to make this work? I have this shopping cart button on every page and want to make it so where ever the user is they will see the quantity of what is in their shopping cart.

Quick side question. I am unable to get my shopping cart image that is set to my url background out of the top left corner. No matter what I do with the background positioning it stays there. Anyone see what I'm doing wrong with it?

***Edited to show placement of total quantity variable

                    <form class="shopcart" id="block right" 

action="shoppingcart.php">
                        <input type="submit" class="shopcart" name="shopcart" value="Shopping Cart">
                    </form> 
                </div>
            </div>
        </div>

        <div class="whitepageOut">  
            <div class="whitepage">
                <div class="content">
                    <h1>Shopping Cart</h1>  
                <!-- Add in additional info. I made the above up, to test. Correct when ready! -->
                        <div class="floatright">
<?php           
            echo "<p>
            <a href='./shoppingcart.php?empty_cart=1'>Empty Cart</a>
            </p>";
?>
                        </div>
<?php
// Initialize cart
if(!isset($_SESSION['shopping_cart'])) {
    $_SESSION['shopping_cart'] = array();
}
// Update Cart
if(isset($_POST['update_cart'])) {
    $quantities = $_POST['quantity'];
    foreach($quantities as $id => $quantity) {
        if(!isset($products[$id])) {
            $message = "Invalid product!";
            break;
        }
        $_SESSION['shopping_cart'][$id]['quantity'] = $quantity;
    }
    if(!$message) {
        $message = "Cart updated!<br />";
    }
}

// Empty cart
if(isset($_GET['empty_cart'])) {
    $_SESSION['shopping_cart'] = array();
}
            if(empty($_SESSION['shopping_cart'])){
                echo "Your cart is empty<br />";
            }
            else {
        echo $message;
?>
                        <form action='./shoppingcart.php?view_cart=1' method='POST'>
                            <table class="carttable">
                                <tr>
                                    <th class="cartth">Name</th>
                                    <th class="cartth">Price</th>
                                    <th class="cartth">Category</th>
                                    <th class="cartth">Quantity</th>
                                </tr>
<?php                               
                        $base_price = 0;
                        foreach($_SESSION['shopping_cart'] as $id => $product) {
                                    $product_id = $product['product_id'];
                                    $base_price += $products[$product_id]['price'] * $product['quantity'];
                                    $shipping_price += $products[$product_id]['shippingprice'] * $product['quantity'];
?>
                                <tr>
                                        <td class="carttd"><?php echo "<a href='./viewProduct.php?view_product=$id'>" . $product['name'];?><?php echo $products[$product_id]['name']; ?> </a>
                                        </td>
                                        <td class="carttd"><?php echo '$' . $products[$product_id]['price']; ?></td> 
                                        <td class="carttd"><?php echo $products[$product_id]['category']; ?></td>
                                        <td class="carttd">
                                        <?php echo "<input type='text' name='quantity[$product_id]'  value='" . $product['quantity'] . "' />"; ?> </td>                                         
                                </tr>
<?php
                                }
                                //Calculates total
                                $total_price += $base_price + $shipping_price;
?>
                                <tr>
                                    <td colspan="2"></td>
                                    <td class="tdcarttotal">Subtotal</td>
                                    <td class="tdcarttotal"><?php echo "$" .  $base_price; ?> </td>
                                </tr>
                                <tr>
                                    <td colspan="2"></td>
                                    <td class="tdcarttotal">Tax</td>
                                    <td class="tdcarttotal">To be determined</td>
                                </tr>
                                <tr>
                                    <td colspan="2"></td>
                                    <td class="tdcarttotal">Shipping Price</td>
                                    <td class="tdcarttotal"><?php echo "$" .  $shipping_price; ?></td>
                                </tr>
                                <tr>
                                    <td colspan="2"></td>
                                    <td class="tdcarttotal">Total</td>
                                    <td class="tdcarttotal"><?php echo "$" .  $total_price; ?></td>
                                </tr>
                            </table>
                                <input type='submit' id='button' name='update_cart' value='Update Cart'>
                        </form>
                <form action="checkout.php?checkout=1">
                    <input type="submit" class="checkoutbutton" value="Proceed to Checkout">
                </form><br><br><br><br><br>
<?php
            }
//Shopping Cart Quantity Count

        if(isset($_SESSION['shopping_cart']) && is_array($_SESSION['shopping_cart'])) {
        $totalquantity = 0;
        foreach($_SESSION['shopping_cart'] AS $product) {
            $totalquantity = $totalquantity + $product['quantity'];
        }
  }
  else {
       $totalquantity = 0;
  }
  echo $totalquantity;
?>

Answer 1

Without showing more of the code, my guess would be that you are trying to show the button before the variable is actually assigned a value.

Edit:

Adding javascript to update the value of the submit button:

Change <input type="submit" class="shopcart" name="shopcart" value="Shopping Cart"> to <input type="submit" class="shopcart" name="shopcart" id="shopcart" value="Shopping Cart"> .

Add this at the end of your PHP code:

echo "<script>document.getElementById('shopcart').value = 'Shopping Cart $totalquantity';</script>";

Hope this helps you!