PHP shopping cart function implementation code (entry example)

//Product category page
 session_start();//Open session environment
 //Determine whether the user has clicked the "Add to Shopping Cart" button
 if(isset($_POST[' cart'])){
 //Assign value in a loop

 foreach($_POST['cart'] as $value){
 //If the product is in the shopping cart
 //Condition:
 //Click "Put" "Add to shopping cart"---array $_SESSION['cart'];
 //Determine which product----Determine whether the name of the product appears in the array
 //array_key_exists(subscript, array);
 if(isset($_SESSION['cart'])&& array_key_exists($value,$_SESSION['cart'])){
 $_SESSION['cart'][$value]++;
 }else{

 //If the product is not in the shopping cart
 $_SESSION['cart'][$value]=1;
 }
 }
 }
?>



 Online Mall_php Shopping Cart-bbs.it-home.org

 Online Mall
 Daily Necessities
 Household appliances
 Stationary supplies
 < a href="carlist.php">View cart
 Clear cart

2. carlist.php displays the items in the shopping cart

 //Display the products in the shopping cart (product name, product quantity)
 session_start();

 echo "The products you have selected include:
 echo "  ";
 //Display the items purchased by the user
 //Includes functions ：Delete the product
 //Modify the quantity of the product
 //Edit bbs.it-home.org
 //Get user purchase information $_SESSION, display products in a loop
 if(isset($_SESSION['cart']) ){
 foreach(@$_SESSION['cart'] as $key=>$value){

 echo " ";
 echo "$key    $value  ";

 //One less item
 echo "Delete one item";
 echo " Delete this item";
 }
 }
 echo "";
 echo "Clear shopping cart echo "";
 echo " Return to homepage";
?>

3. File cardel.php to clear the shopping cart

session_start();//Open session environment
//Clear the shopping cart
 unset($_SESSION['cart'] );
 ?>

The above code implements the common functions of a shopping cart, displaying product classification and information, processing of products in the shopping cart, etc. I hope to be helpful.