cartfunctions.php

来自「php源码 php源码参考」· PHP 代码 · 共 148 行

<?php
require_once('AmazonResultSet.php');

// Using the function showSummary() in the file bookdisplay.php display
// the current contents of the shopping cart
function showCart($cart, $mode)
{
  // build an array to pass
  $products = array();
  foreach($cart as $ASIN=>$product)
  {
    $ars = getARS('asin', array('asin'=>$ASIN, 'mode'=>$mode));
    if($ars)
      $products[] = $ars->getProduct(0);
  }
  // build the form to link to an Amazon.com shopping cart
  echo '<form method="POST" 
              action="http://www.amazon.com/o/dt/assoc/handle-buy-box">';
  foreach($cart as $ASIN=>$product)
  {
    $quantity = $cart[$ASIN]['quantity'];
    echo "<input type='hidden' name='asin.$ASIN' value='$quantity'>";
  }
  echo '<input type="hidden" name="tag-value" value="ASSOCIATEID">';
  echo '<input type="hidden" name="tag_value" value="ASSOCIATEID">';
  echo '<input type="image" src="images/checkout.gif" 
                            name="submit.add-to-cart" 
                            value="Buy From Amazon.com">';
  echo ' When you have finished shopping press checkout to add all the 
         items in your Tahuayo cart to your Amazon cart and complete 
         your purchase.<br />';
  echo '</form>';
  
  echo '<a href = "index.php?action=emptycart"><img 
           src = "images/emptycart.gif" alt = "Empty Cart" border = 0></a> 
        If you have finished with this cart, you can empty it of all items.
        <br />';
  echo '<h1>Cart Contents</h1>';
  showSummary($products, 1, count($products), $mode,  0, true);

}

// show the small overview cart that is always on the screen
// only shows the last three items added 
function showSmallCart()
{
  global $_SESSION;
  
  echo '<table border = 1 cellpadding = 1 cellspacing = 0>';
  echo '<tr><td class = cartheading>Your Cart $'.
       number_format(cartPrice(), 2).
       '</td></tr>';
  echo '<tr><td class = cart>'.cartContents().'</td></tr>';
  
  // form to link to an Amazon.com shopping cart
  echo '<form method="POST" 
              action="http://www.amazon.com/o/dt/assoc/handle-buy-box">';
  echo '<tr><td class = cartheading><a href = 
                            "index.php?action=showcart"><img 
                            src="images/details.gif" border=0></a>';
  foreach($_SESSION['cart'] as $ASIN=>$product)
  {
    $quantity = $_SESSION['cart'][$ASIN]['quantity'];
    echo "<input type='hidden' name='asin.$ASIN' value='$quantity'>";
  }
  echo '<input type="hidden" name="tag-value" value="ASSOCIATEID">';
  echo '<input type="hidden" name="tag_value" value="ASSOCIATEID">';
  echo '<input type="image" src="images/checkout.gif" 
               name="submit.add-to-cart" value="Buy From Amazon.com">';
  echo '</td></tr>';
  echo '</form>';

  echo '</table>';
}

// show last three items added to cart
function cartContents()
{
  global $_SESSION;
  
  $display = array_slice($_SESSION['cart'], -3, 3);
  // we want them in reverse chronological order
  $display = array_reverse($display, true);
  
  $result = '';
  $counter = 0;
  
  // abbreviate the names if they are long
  foreach($display as $product)
  {
    if(strlen($product['name'])<=40)
      $result .= $product['name'].'<br />';
    else
      $result .= substr($product['name'], 0, 37).'...<br />';
    $counter++;
  }  
  
  // add blank lines if the cart is nearly empty to keep the 
  // display the same
  for(;$counter<3; $counter++)  
  {
    $result .= '<br />';
  }
  return $result;
}

// calculate total price of items in cart
function cartPrice()
{
  global $_SESSION;
  $total = 0.0;
  foreach($_SESSION['cart'] as $product)
  {
    $price = str_replace('$', '', $product['price']);
    $total += $price*$product['quantity'];
  }
  
  return $total;
}

// add a single item to cart
// there is currently no facility to add more than one at a time
function addToCart(&$cart, $ASIN, $mode)
{
  if(isset($cart[$ASIN] ))
  {
    $cart[$ASIN]['quantity'] +=1;
  }
  else
  {
    // check that the ASIN is valid and look up the price
    $ars = new AmazonResultSet;
    $product = $ars->ASINSearch($ASIN, $mode);
    
    if($product->valid())
      $cart[$ASIN] = array('price'=>$product->ourPrice(), 
                      'name' => $product->productName(), 'quantity' => 1) ;
  }    
  
}
  
// delete all of a particular item from cart
function deleteFromCart(&$cart, $ASIN)
{
  unset ($cart[$ASIN]);
}
    
?>