السلام عليكم
عملت تطبيق لدرس shopping cart بس يطلع error غيرت اشياء وبعض الاخطاء راحت فضل اشياء بسيطه
products.php
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="description" content="PHP Shopping Cart Using Sessions" />
<meta name="keywords" content="shopping cart tutorial, shopping cart, php, sessions" />
<link rel="stylesheet" media="all" href="/style/style.css" type="text/css" />
<title>Products</title>
<?php
include ("connectdb1.php");
?>
</head>
<body>
<table border="1">
<?php
$sql = "SELECT pid, pname, pimage, pdescription, pprice FROM products;";
$result = mysql_query($sql);
while(list($pid, $pname, $pimage, $pdescription, $pprice) = mysql_fetch_row($result)) {
echo "<tr>";
echo "<td>$pname</td>";
echo "<td>$pimage</td>";
echo "<td>$pdescription</td>";
echo "<td>$pprice</td>";
echo "<td><a href=\"cart.php?action=add&id=$pid\">Add To Cart</a></td>";
echo "</tr>";
}
?>
</table>
<a href="cart.php">View Cart</a>
</body>
</html>ودي صفحه cart.php
?php session_start(); ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta name="description" content="PHP Shopping Cart Using Sessions" />
<meta name="keywords" content="shopping cart tutorial, shopping cart, php, sessions" />
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<link rel="stylesheet" media="all" href="/style/style.css" type="text/css" />
<title>Cart</title>
<?php
include ("connectdb1.php");
?>
</head>
<body>
<?php
$id = $_GET['id']; //the product id from the URL
$action = $_GET['action']; //the action from the URL
//if there is an product_id and that product_id doesn't exist display an error message
if($id && !productExists($id)) {
die("Error. Product Doesn't Exist");
}
switch($action) { //decide what to do
case "add":
$_SESSION['cart'][$id]++; //add one to the quantity of the product with id $product_id
break;
case "remove":
$_SESSION['cart'][$id]--; //remove one from the quantity of the product with id $product_id
if($_SESSION['cart'][$id] == 0) unset($_SESSION['cart'][$id]); //if the quantity is zero, remove it completely (using the 'unset' function) - otherwise is will show zero, then -1, -2 etc when the user keeps removing items.
break;
case "empty":
unset($_SESSION['cart']); //unset the whole cart, i.e. empty the cart.
break;
}
?>
<?php
if($_SESSION['cart']) { //if the cart isn't empty
//show the cart
echo "<table border=\"1\" padding=\"3\" width=\"40%\">"; //format the cart using a HTML table
//iterate through the cart, the $product_id is the key and $quantity is the value
foreach($_SESSION['cart'] as $pid => $quantity) {
//get the name, description and price from the database - this will depend on your database implementation.
//use sprintf to make sure that $product_id is inserted into the query as a number - to prevent SQL injection
$sql = sprintf("SELECT pname, pimage, pdescription, pprice FROM products WHERE pid = %d;",
$pid);
$result = mysql_query($sql);
//Only display the row if there is a product (though there should always be as we have already checked)
if(mysql_num_rows($result) > 0) {
list($pname, $pimage, $pdescription, $pprice) = mysql_fetch_row($result);
$line_cost = $pprice * $quantity; //work out the line cost
$total = $total + $line_cost; //add to the total cost
echo "<tr>";
//show this information in table cells
echo "<td align=\"center\">$pname</td>";
//along with a 'remove' link next to the quantity - which links to this page, but with an action of remove, and the id of the current product
echo "<td align=\"center\">$quantity <a href=\"$_SERVER[PHP_SELF]?action=remove&id=$pid\">X</a></td>";
echo "<td align=\"center\">$line_cost</td>";
echo "</tr>";
}
}
//show the total
echo "<tr>";
echo "<td colspan=\"2\" align=\"right\">Total</td>";
echo "<td align=\"right\">$total</td>";
echo "</tr>";
//show the empty cart link - which links to this page, but with an action of empty. A simple bit of javascript in the onlick event of the link asks the user for confirmation
echo "<tr>";
echo "<td colspan=\"3\" align=\"right\"><a href=\"$_SERVER[PHP_SELF]?action=empty\" onclick=\"return confirm('Are you sure?');\">Empty Cart</a></td>";
echo "</tr>";
echo "</table>";
}else{
//otherwise tell the user they have no items in their cart
echo "You have no items in your shopping cart.";
}
//function to check if a product exists
function productExists($pid) {
//use sprintf to make sure that $product_id is inserted into the query as a number - to prevent SQL injection
$sql = sprintf("SELECT * FROM products WHERE pid = %d;",
$pid);
return mysql_num_rows(mysql_query($sql)) > 0;
}
?>
<a href="shopingcart.php">Continue Shopping</a>
<?php
?>الخطئين الاولين عند اضغط Add to cart يظهر كذا
( ! ) Notice: Undefined index: cart in C:\wamp\www\all_php\cart.php on line 34
Call Stack
# Time Memory Function Location
1 0.0036 389864 {main}( ) ..\cart.php:0
( ! ) Notice: Undefined index: 1 in C:\wamp\www\all_php\cart.php on line 34
Call Stack
# Time Memory Function Location
ومن الملاحظ المجموع غلط لان في السله فقط one product
والخط الثاني عند تفريغ السله
( ! ) Notice: Undefined index: id in C:\wamp\www\all_php\cart.php on line 23
Call Stack
# Time Memory Function Location
1 0.0019 389576 {main}( ) ..\cart.php:0
( ! ) Notice: Undefined index: cart in C:\wamp\www\all_php\cart.php on line 53
Call Stack
# Time Memory Function Location
1 0.0019 389576 {main}( ) ..\cart.php:0
You have no items in your shopping cart. Continue Shopping