does anyone can help me? how to fixed it? :(

[Bhame]

Notice: Undefined index: id_product in D:\xampp\htdocs\web\products.php on line 4 This product id is invalid
 

 

 

<?php

if(isset($_GET['action']) && $_GET['action'] == "add"){
$id = intval($_GET['id_product']); <<<<<< HERE's THE PROBLEM
if(isset($_SESSION['cart'][$id])){
$_SESSION['cart'][$id]['quantity']++;
}else {
$sql2 = "SELECT * FROM products WHERE id_product={$id}";
$query2 = mysql_query($sql2);

if(mysql_num_rows($query2) != 0){
$row2 = mysql_fetch_array($query2);
$_SESSION['cart'][$row2['id_product']] = array("quantity" => 1, "price" => $row2['price']);

}else{
$message = "This product id is invalid";
} 
}
}

?>

[requinix]

The problem is you're assuming something's in an array when it actually isn't. You should check if it is first.

 

And there's probably some logistical problem with the code that I can't tell because I have no idea what this code is.