购物车总数 PHP 买一送一

Question

我正在 PHP 中创建一个购物车，特定商品是买一送一。当用户购买商品时，我会希望从总数中扣除报价，但我仍然坚持如何从数学上进行计算。

到目前为止，我在从数据库获取数据的 if 循环中有类似的东西：

$total = $total+($arraycart['Price']*$quantity);

然后我认为它会是这样的：

if ($arraycart['Item'] == "A1" and $quantity > 1) {
//calculate here buy one get one half price
}

感谢任何帮助。

Answer 1

<?php
$total = 0;
$arraycart['Price'] = 10;
$arraycart['Item'] = 'A1';

$quantity = 3; // change item quantity here

if ($arraycart['Item'] == "A1" and $quantity % 2 == 0 ) {
    //calculate here buy one get one half price
    $real = ($quantity/2)*$arraycart['Price'];
    $half = ($quantity/2)*($arraycart['Price']/2);

    $total = $real+$half;

} else {
    $quantity = $quantity-1;

    $real = ($quantity/2)*$arraycart['Price'];
    $half = ($quantity/2)*($arraycart['Price']/2);

    $total = $real+$half+$arraycart['Price'];

}

echo $total;
?>

购物车总数 PHP 买一送一

Buy One Get One Half Price in PHP shopping cart total

php

shopping-cart