如果会话中已有产品，如何增加产品数量

Question

I am using the below code and want to increase the quantity in session array but its not working

if(!empty($_SESSION['quote']))
{

$prdata=$_SESSION['quote'];
}

$product_id = $data['id'];
$product_image = $data['image'];
$product_name = $data['pname'];
$product_quantity = $data['quantity'];
$product_price = $data['price'];

foreach ($_SESSION["quote"] as $cart_itm){         
         if($cart_itm['product_id'] == $product_id){ //the item exist in array

    $newdat = array('product_id' => $product_id,'quantity'=>$product_quantity,'price'=>$product_price,'name'=>$product_name,'image'=>$product_image); 
    $found = true;

}else{

    $newdat = array('product_id' => $product_id,'quantity'=>$product_quantity,'price'=>$product_price,'name'=>$product_name,'image'=>$product_image); 

}

Answer 1

You don't need to put there product_id etc. again, change just amount. Your code will be shorter, clearer and you avoid to other possible typos, etc.

if($cart_itm['product_id'] == $product_id) {
    $cart_itm['quantity'] += $product_quantity; // expect in $product_quantity is the amount you want to add to the current one
    // it's a shorter variant of $cart_itm['quantity'] = $cart_itm['quantity'] + $product_quantity; 
}