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我正在尝试设置一个订单表格，其中客户输入任何数量，因此我的库存会更新，从而为下一个客户保留当前数量，我一直在尝试提供正确的代码，但到目前为止还没有运气。任何建议将不胜感激，这是我的代码：

<?php
session_start(); //Lets start a session! This is the index page
$_SESSION["access"] = "My_session";
//We need a header right, well here it is?
define ("TITLE", "Products page");
include('templates/header.html');
?>
<h2 class="intro">
    Looking for the perfect widget for the perfect person? Browse through our small but original
    list of products to purchase. Alternatively you can contact us through our contact page and one of our team will get
    back to you as soon as possible.
    WIDGET ORDER FORM Widget Quantity Cost Dehydrated water " /> $ 18.50 Glass Stems " /> $ 28.50

    <?php
    // Get the values from the $_POST array:
    $quantityarray = ((isset($_POST['f_wa']) ? $_POST['f_wa'] : '') || (isset($_POST['f_gl']) ? $_POST['f_gl'] : ''));

    include 'connection.php';

    # Define the SQL statement
    $query = 'Select ProductID, InStock from Inventory ORDER BY ProductID';
    if ($result = mysql_query($query)) {
        while ($row = mysql_fetch_array($result)) {
            $currentnum = $row['InStock'] - $quantityarray[$row['ProductID']];
            $prodid = $row['ProductID'];
            // execute a SQL statement to update the InStock number
            $query = "UPDATE Inventory SET InStock = $currentnum WHERE ProductID=$prodid";
            sendquery($query);
        }
    }

    function sendquery($query)
    {
        if (@mysql_query($query)) {
            print '<p>Table populated.</p>';
        } else {
            print '<p style="color:red;">Error executing SQL statement: <br/>' . mysql_error() . '.</p>

    <p>The statement being run was: ' . $query . '</p>';
        }
    }

    ?>
    <?php
    //To conclude we also need the footer, don't we?.
    include('templates/footer.html');
    ?>
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1 回答 1

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你永远不会得到$productquantity数组。您的陈述将评估为真或假：

$quantityarray = ((isset($_POST['f_wa']) ? $_POST['f_wa'] : '') || (isset($_POST['f_gl']) ? $_POST['f_gl'] : ''));

在||这个语句中的意思是如果第一条语句或第二条语句为真则设置$quantityarray为真否则设置$quantityarray为假

你应该var_dump($quantityarray)看到这个。

于 2013-07-13T03:14:41.040 回答