Calculate a new price in function the discount and quantity - php

Question

I trying to develop a function allowing to calculate a specific price in function the quantity discount
Example : 10% = $discount_customer[] in function the database
$qty is add by an user
if $qty < 5 then $$discount_customer[] = 0 : price does'nt change
if $qty > 5 et qty < 10 then $$discount_customer[] = 10% : price with -10%
...
if $qty > 10 then $$discount_customer[] = 15% : price with -15%
$id : id of the product
$qty : order quantity inserted by a customer
$products_price : price of the product
public function getProductsNewPriceByDiscountQuantity($id, $qty, $products_price) {
$OSCOM_Db = Registry::get('Db');
$OSCOM_Customer = Registry::get('Customer');
$QprodutsQuantityDiscount= $OSCOM_Db->prepare('select discount_quantity,
discount_customer
from :table_products_discount_quantity
where products_id = :products_id
and customers_group_id = :customers_group_id
and discount_quantity <> 0
');
$QprodutsQuantityDiscount->bindInt(':products_id', (int)$id );
$QprodutsQuantityDiscount->bindInt(':customers_group_id', $OSCOM_Customer->getCustomersGroupID());
$QprodutsQuantityDiscount->execute();
while ($QprodutsQuantityDiscount->fetch()) {
// quantity discount
$discount_quantity[] = $QprodutsQuantityDiscount->valueInt('discount_quantity');
// Customer discount
$discount_customer[] = $QprodutsQuantityDiscount->valueDecimal('discount_customer');
}
I suppose to create a foreach but how ?
Thie element doesn't take the between condition.
foreach ($discount_quantity as $k => $quantity) {
print_r('<pre>');
var_dump($quantity );
print_r('</pre>');
foreach ($discount_customer as $c => $discount) {
if ($qty > $quantity) {
$news_price = $products_price -(($products_price * $discount) /100);
}
print_r('<pre>');
print_r($news_price);
print_r('</pre>');
}
return $newprice
}
thank you

Answer 1

public function getProductsNewPriceByDiscountQuantity($id, $qty, $products_price) {
$OSCOM_Db = Registry::get('Db');
$OSCOM_Customer = Registry::get('Customer');
$QprodutsQuantityDiscount= $OSCOM_Db->prepare('select discount_quantity,
discount_customer
from :table_products_discount_quantity
where products_id = :products_id
and customers_group_id = :customers_group_id
and discount_quantity <> 0
');
$QprodutsQuantityDiscount->bindInt(':products_id', (int)$id );
$QprodutsQuantityDiscount->bindInt(':customers_group_id', $OSCOM_Customer->getCustomersGroupID());
$QprodutsQuantityDiscount->execute();
while ($QprodutsQuantityDiscount->fetch()) {
$discount_quantity[] = $QprodutsQuantityDiscount->valueInt('discount_quantity');
$discount_customer[] = $QprodutsQuantityDiscount->valueDecimal('discount_customer');
}
return $this->getPrctDiscount($qty, $products_price);
}
public function getPrctDiscount($qty, $products_price)
{
$discount = 0;
if ($qty > 5 && $qty < 10) {
$discount = 10;
}elseif ($qty > 10) {
$discount = 15;
}
$newPrice = $discount > 0
? $products_price - ($products_price * ($discount/100))
: $newPrice;
return $newPrice;
}