我为一家餐厅网站创建了一个预订页面,其中包含用于预订晚餐的表格。它包含一个下拉框,允许用户选择将在他们的聚会中用餐的人数。它还包含一个单选按钮,允许用户选择是否希望坐在VIP区(是/否)。
派对中的每个人应额外支付5英镑的预订费,如果他们希望在VIP区就座,他们将额外收取5英镑的费用。表单验证成功后,用户将被发送到确认页面,其中将向他们显示他们输入的预订详细信息。
目前,我网站的确认页面上有一个计算,可以正确计算派对规模成本,但我的问题是,即使VIP区域选择为"否",它仍然会增加5英镑的费用,就好像用户选择了"是"。
以下是我的预订页面上的相关 html 代码:
<?php
session_start();
if (isset($_POST['submit'])) {
$_SESSION['party'] = $_POST['party'];
}
if ( !empty($_POST['vip']))
$_SESSION['vip'] = $_POST['vip'];
?>
...
<strong>Select Party Size* :</strong>
<br>
<select name="party" id="party" value="<?php echo $party;?>">
<option value="">Please Select</option>
<option <?php if (isset($party) && $party=="1") echo "selected";?> value="1">1 Person (+£5)</option>
<option <?php if (isset($party) && $party=="2") echo "selected";?> value="2">2 People (+£10)</option>
<option <?php if (isset($party) && $party=="3") echo "selected";?> value="3">3 People (+£15)</option>
<option <?php if (isset($party) && $party=="4") echo "selected";?> value="4">4 People (+£20)</option>
<option <?php if (isset($party) && $party=="5") echo "selected";?> value="5">5 People (+£25)</option>
<option <?php if (isset($party) && $party=="6") echo "selected";?> value="6">6 People (+£30)</option>
<option <?php if (isset($party) && $party=="7") echo "selected";?> value="7">7 People (+£35)</option>
<option <?php if (isset($party) && $party=="8") echo "selected";?> value="8">8 People (+£40)</option>
<option <?php if (isset($party) && $party=="9") echo "selected";?> value="9">9 People (+£45)</option>
<option <?php if (isset($party) && $party=="10") echo "selected";?> value="10">10+ People (+£50)</option>
</select>
<strong> VIP area* : </strong> <br><br>
Yes (+£5) <input type="radio" name="vip" <?php if (isset($vip) && $vip=="Yes") echo "checked";?> value="Yes">
<br><span id="vip" class="error"><?php echo $vipErr;?></span><br>
No <input type="radio" name="vip" <?php if (isset($vip) && $vip=="No") echo "checked";?> value="No">
以下是确认页面上的相关计算:
<b>Total Reservation Costs: </b><br><br> £
<?php
if (isset($_SESSION['party']) && is_numeric($_SESSION['party'])) {
$party = (int)$_SESSION['party'];
$vip = isset($_SESSION['vip']) ? 5 : 0;
echo (($party * 5) + $vip);
}
?>
有谁知道如果用户选择了"是",我如何启用计算以仅添加 VIP 区域座位的额外 5 英镑?我是网络语言的新手,所以任何帮助将不胜感激。谢谢!
您的三元语句当前仅检查是否设置了$_SESSION['vip']
。问题是无论用户选择什么("是"或"否")都会设置它,因为在设置会话变量的部分,条件语句会在$_POST['vip']
不为空时设置会话变量。
尝试检查它是否等于"是",如下所示:
<b>Total Reservation Costs: </b><br><br> £
<?php
if (isset($_SESSION['party']) && is_numeric($_SESSION['party'])) {
$party = (int)$_SESSION['party'];
$vip = (isset($_SESSION['vip']) && $_SESSION['vip'] === 'Yes') ? 5 : 0;
echo (($party * 5) + $vip);
}
?>
无需使用会话使代码复杂化。只需使用 $_POST :
<?php
$options = array(
1 => '1 Person (+£5)',
2 => '2 Person (+£10)',
3 => '3 Person (+£15)',
...
10 => '1 Person (+£50)',
);
?>
...
<select name="party" id="party">
<option value="-1">Please select</option>
<?php
foreach ($options as $persons => $text) {
$selected = isset($_POST['party'] && $_POST['party'] == $persons) ? ' selected' : '';
echo '<option value="'.$persons.'".'.$selected.'>'.$text.'</option>';
}
?>
</select>
...
Yes <input type="radio" value="1" name="vip" id="vip_yes" <?php if (isset($_POST['vip']) && $_POST['vip'] == 1) { echo 'checked' } ?> />
No <input type="radio" value="0" name="vip" id="vip_no" <?php if (isset($_POST['vip']) && $_POST['vip'] == 0) { echo 'checked' } ?> />
...
<?php
if (isset($_POST['party']) && is_numeric($_POST['party']) ) {
$price = $_POST['party'] * 5;
if (isset($_POST['vip']) && $_POST['vip'] == 1) $price += 5;
}else{
//-- no post
$price = 0;
}
if ($price == 0) {
echo 'Please select your options..';
}else{
echo 'Your price is £' . $price;
}
?>
您需要
重新计算并为成为VIP的成本添加一个变量。
if ($vip =='Yes'){$vip_cost = +5)}else{$vip_cost=0}
然后添加每个人的成本并添加 $vip_cost
<?php
$form = '<form action="'.$_SERVER['PHP_SELF'].'" method="post">
<select name="party" id="party" >
<option value="">--Select People--</option>
<option value="1">1 People (+£5)</option>
<option value="2">2 People (+£10)</option>
<option value="3">3 People (+£15)</option>
<option value="4">4 People (+£20)</option>
<option value="5">5 People (+£25)</option>
<option value="6">6 People (+£30)</option>
<option value="7">7 People (+£35)</option>
<option value="8">8 People (+£40)</option>
<option value="9">9 People (+£45)</option>
<option value="10">10People (+£50)</option>
</select><br /><br />
<strong> VIP area* : </strong> <br><br>
Yes (+£5) <input type="radio" name="vip" value="Yes">
No <input type="radio" name="vip" value="No"><br /><br />
<input type="submit" value="Submit" name="submit" />';
if (isset($_POST['submit'])){
if (isset($_POST['party'])){
$cost = ($_POST['party'] *5);
if ($_POST['vip'] =='Yes'){$vip_cost = 5; $vip_text='with vip';}else{$vip_cost=0; $vip_text='';}
$total = ($cost+$vip_cost);
$display = 'Your reservation for '.$_POST['paty'].' '.$vip_text.' will cost '.$total;
}
else{
$display = 'Please Select How Many People<br />'.$form;}
}else{
$display=$form;
}
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
</head>
<body>
<?php echo $display;?>
</body>
</html>