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下面的代码有 8 个包含用户注册数据的 $_POST 变量。下面的代码还具有促销代码文本字段，当用户输入促销代码并尝试更新时，我丢失了包含用户注册数据的 8 个 $_POST 变量的值。我想知道是否有办法不丢失这些数据？

<?php
    session_start();

    //Create mysql connect variable
    $conn = mysql_connect('host', 'root', 'raycharles');

    //kill connection if error occurs
    if(!$conn){
        die('Error: Unable to connect.' . '<br>' . mysql_error());
    }
    //connect to mysql database
    mysql_select_db("wibldard", $conn);



    //GET PROMO CODES FROM DB
    $promo_results = mysql_query("SELECT * FROM promo",$conn);

    while($promo_row = mysql_fetch_array($promo_results)){
        echo $promo_row['promo_code'];
    }

    if(isset($_GET['promo'])){
        echo $_GET['promo'];
    }
    ?>

    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Strict//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>
<head>

    <!-- JAVASCRIPT -->
    <script type="text/javascript" src="js/jquery.js"></script>

    <!-- STYLES & FONTS -->
    <link rel="stylesheet" type="text/css" href="css/style.css" />

    <!--JQUERY-->
    <script type="text/javascript">
    $(document).ready(function(){
        $("#mainsearchfield").Watermark("");
    });

    </script>

</head>

<body>
<div id="main-container">
<?php include('inc/menu.inc.php'); ?>

<div id="body-container" style="padding-bottom:150px; height:800px;">
    <div style="height:100px; margin:0px auto;">
        <img class="reg-step" style="width:100%;" src="images/step2.png">
    </div>

    <?php
        //echo 'e-mail :' . $_POST['email'] . '<br/>' . 'password :' . $_POST['password'] . '<br/>' .  'city: ' . $_POST['city'] . '<br/>' .  'state: ' . $_POST['state']  . '<br/>' . 'phone: ' .  $_POST['phone'] . '<br/>' .  'first name: '. $_POST['fname'] . '<br/>' .  'last name: ' . $_POST['lname'] . '<br/>company: ' . $_POST['company-name'] ;
        $_SESSION['email'] = $_POST['email'];
        $_SESSION['password'] = $_POST['password'];
        $_SESSION['city'] = $_POST['city'];
        $_SESSION['state'] = $_POST['state'];
        $_SESSION['phone'] = $_POST['phone'];
        $_SESSION['first'] = $_POST['fname'];
        $_SESSION['last'] = $_POST['lname'];
        $_SESSION['compname'] = $_POST['compname'];
    ?>

    <span style="font-size:22px; color:blue; font-weight:bold; margin-left:100px;"> Invoice </span>
<div style="width:900px; height:500px; border:1px solid #ddd; margin-left:100px;"> 
    <table id="registration-table1">
        <!-- Results table headers -->
        <tr style="background-color:lightblue;">
          <th>Date</th>
          <th>Product</th>
          <th style="width:50px;">Qty</th>
          <th>Cost</th>
        </tr>
        <tr>
          <td style="width:120px;"><?php echo date("m/d/y");?></td>
          <td style="width:570px; text-align:left; padding-left:10px;">
                <a href="#">Apples</a>
          </td>
          <td style="text-align:center; padding-bottom:120px;">1</td>
          <td style="width:150px; padding-bottom:120px; text-align:center;">$59.99</td>
        </tr>
    </table>
    <div style="float:left; width:350px; font-size:12px; padding:10px;">*An order confirmation e-mail will be sent out to the address provided upon payment authorization.</div>
    <table id="registration-table2"> 
        <tr>
            <td style="font-weight:bold; width:140px; padding:10px; padding-right:20px;">Promo Code:</td>
            <td class="table2-cell">
                <form method="get" action="registernewstep2.php">
                    <input name="promo" style="width:90px; margin-right:7px; margin:5px;" type="text" /><br/>
                    <input type="submit" style="margin-bottom:5px;" value="update"/>
                </form>
            </td>
        </tr>
        <tr>
          <td class="table2-heading-cell">Delivery:</td>
          <td class="table2-cell"><i>Electronic</i></td>
        </tr>
        <tr>
          <td class="table2-heading-cell">Shipping:</td>
          <td class="table2-cell">$0.00</td>
        </tr>
        <tr>
          <td class="table2-heading-cell">Tax:</td>
          <td class="table2-cell">$0.00</td>
        </tr>
        <tr>
          <td class="table2-heading-cell">Total:</td>
          <td class="table2-cell">$59.99</td>
        </tr>
        <tr>
          <td style="font-weight:bold; padding:10px; border:none;"></td>
          <td style="text-align:center; border:none; padding-top:20px;">
            <!--CHECKOUT BUTTON-->
            <form action="https://www.paypal.com/cgi-bin/webscr" method="post">
                <input type="hidden" name="cmd" value="_xclick">
                <input type="hidden" name="business" value="johnnycage9@gmail.com">
                <input type="hidden" name="lc" value="US">
                <input type="hidden" name="item_name" value="apples">
                <input type="hidden" name="item_number" value="1701">
                <input type="hidden" name="amount" value="1.00">
                <input type="hidden" name="currency_code" value="USD">
                <input type="hidden" name="button_subtype" value="services">
                <input type="hidden" name="no_note" value="0">
                <input type="hidden" name="tax_rate" value="0.000">
                <input type="hidden" name="shipping" value="0.00">
                <input type="hidden" name="bn" value="PP-BuyNowBF:btn_buynow_SM.gif:NonHostedGuest">
                <input type="image" src="https://www.paypalobjects.com/en_US/i/btn/btn_buynow_SM.gif" style="border:1px solid #fff;" name="submit" alt="PayPal - The safer, easier way to pay online!">
                <img alt="" border="0" src="https://www.paypalobjects.com/en_US/i/scr/pixel.gif" width="1" height="1">
            </form>
          </td>
        </tr>
    </table>
</div>

<?php include('inc/footer.inc.php'); 

echo'
</div>
</body>
</html>';
4

1 回答 1

0

$_POST 变量仅“发布”到显示的页面，因此当您的用户输入并提交促销代码时，您当前没有发布您缺少的值。

为此，您需要向正在提交的表单添加一些隐藏字段。表单字段名称必须与 $_POST 变量相同，并且每个字段的值应该是来自发布字段的值，如下所示：

<form method="get" action="registernewstep2.php">
    <input type="hidden" name="email" value="<?php echo $_POST['email'>; ?>"/>
    <input type="hidden" name="password" value="<?php echo $_POST['password'>; ?>"/>
    <input type="hidden" name="city" value="<?php echo $_POST['city'>; ?>"/>
    <input type="hidden" name="state" value="<?php echo $_POST['state'>; ?>"/>
    <input type="hidden" name="phone" value="<?php echo $_POST['phone'>; ?>"/>
    <input type="hidden" name="fname" value="<?php echo $_POST['fname'>; ?>"/>
    <input type="hidden" name="flname" value="<?php echo $_POST['flname'>; ?>"/>
    <input type="hidden" name="compname" value="<?php echo $_POST['compname'>; ?>"/>
    <input name="promo" style="width:90px; margin-right:7px; margin:5px;" type="text" /><br/>
    <input type="submit" style="margin-bottom:5px;" value="update"/>
</form>
于 2012-07-07T15:52:24.423 回答