gildas-Milandou Posted June 3, 2023 Share Posted June 3, 2023 I have an error in my code, I am trying to display the total amount of each user unsing Total cart price: here is the code : // Total price function function total_cart_price(){ global $con; $get_ip_add = getIPAddress(); $total_price=0; $cart_query="select * from `cart_details` where ip_address=' $get_ip_add'"; $result=mysqli_query($con,$cart_query); while($row=mysqli_fetch_array($result)){ $product_id=$row['product_id']; $select_products="select * from `products` where product_id='$product_id'"; $result_products=mysqli_query($con,$select_products); while($row_product_price=mysqli_fetch_array($result_products)){ $product_price=array($row_product_price['product_price']); $product_values=array_sum($product_price); $total_price+=$product_values; } } echo $total_price; } And here is the final displayed of the executing code: Total Price: 0 . Nothing is showing and there is not a error message too. Can someone help me please ? I mean the is nothing that showed, Total Price: 0. Quote Link to comment Share on other sites More sharing options...
ginerjm Posted June 3, 2023 Share Posted June 3, 2023 Do you error checking enabled? Why are you doing a query inside that loop? You should do your data collection with a single query. Quote Link to comment Share on other sites More sharing options...
Barand Posted June 3, 2023 Share Posted June 3, 2023 All you need is one query $result = $pdo->prepare("SELECT SUM(p.product_price) FROM cart_details c JOIN products p ON c.product_id = p.product_id WHERE c.ip_address = ? "); $result->execute([ getIPAddress() ]); $total_price = $result->fetchColumn(); Quote Link to comment Share on other sites More sharing options...
mac_gyver Posted June 3, 2023 Share Posted June 3, 2023 ps, everyone on the same network will have the same ip address. if you are going to use a database based cart, you need to generate a unique value per visitor to use to identify each cart. the simplest way of doing this is to start a session, then use the session id as the identifier. pps, your cart should have a quantity column, so that someone could have more than one of each item. Quote Link to comment Share on other sites More sharing options...
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