PHP：总成本

Question

我想根据数量将所有产品价格加在一起。唯一的问题是每个项目都是根据用户选择随机添加的，然后可以将它们调整为任意随机数量。

尝试为存储创建一个额外的数组，将变量添加到一起，但它没有接受QT ammount。

PHP：

<?php

$total = 0;

// Fetch Database

$results->data_seek(0);

foreach ($_SESSION['cart'] as $item => $quantity) {

    $row = $results->fetch_assoc();

    $pId    = $row['ProductID'];
    $pName  = $row['ProductName'];
    $pImg   = $row['ProductImg'];
    $pPrice = $row['Price'];
    $pInfo  = $row['About'];

    foreach ($quantity as $quantity) {

        $priceA = array();

        $pushA = $pPrice * $quantity;

        array_push($priceA, $pushA);

        $bT = implode(",", $priceA);

        $total += $priceA;

    }

?>

标记

    <div class="col">
        <img src="img/<?php echo $pImg; ?>">

        <h1><?php
            echo $pName;
        ?></h1>

        <h2>$<?php
            echo $pPrice;
        ?></h2>

        <h3>QT: <?php echo $quantity; ?> 
          <a href="addc.php?id=<?php echo $pId ?>">+</a> 
          <a href="rc.php?id=<?php echo $pId ?>">-</a></h3>
    </div>

    <?php } ?>

    <div class="cpan">
        <div class="col2">
            <div class="allc">
                <h1>Your total: <?php echo ($total); ?></h1>
            </div>
        </div>
    </div>

PHP

// Add 1 QT

$item = $_GET['id'];
$quantity = 1;

if(isset($_SESSION['cart'][$item])) {
    $_SESSION['cart'][$item] += $quantity;
} else {
    $_SESSION['cart'][$item] = $quantity;
}


// Remove 1 QT 

$item = $_GET['id'];
$quantity = 1;

if(isset($_SESSION['cart'][$item])) {
    $_SESSION['cart'][$item] -= $quantity;
} else {
    $_SESSION['cart'][$item] = $quantity;
}

Answer 1

解决。

• 删除辅助foreach
• 更改变量以匹配...

<强> PHP：

<?php

    $total = 0;

    // Fetch Database

    $results->data_seek(0);

    foreach ($_SESSION['cart'] as $item => $quantity) {

        $row = $results->fetch_assoc();

        $pId    = $row['ProductID'];
        $pName  = $row['ProductName'];
        $pImg   = $row['ProductImg'];
        $pPrice = $row['Price'];
        $pInfo  = $row['About'];


            $priceA = array();

            $pushA = $pPrice * $quantity;

            array_push($priceA, $pushA);

            $bT = implode(",", $priceA);

            $total += $bT; // Change to $bT

    ?>