PHP检查单选按钮，然后输出名称和价格 - PHP checking Radio button then outputting Name and Price

PHP checking Radio button then outputting Name and Price

我有几个单选按钮，a和B。两者都有四个单选按钮。我的代码现在与所选单选按钮的值相呼应，但这不是我想要的。我想让它检查选择了哪个按钮，然后回显产品名称和价格。

<!DOCTYPE html>
<html>
  <head>
    <title>Ordering System</title>
<!-- include css file here-->
   <link rel="stylesheet" href="css/style.css"/>
  </head>   
  <body>
<?php
 //prices of Radio A
  $A1 = 10;
  $A2 = 20;
  $A3 = 30;
  $A4 = 50;  
 //prices of Radio B
  $B1 = 20;
  $B2 = 30;
  $B3 = 40;
  $B4 = 50;
?>

    <div class="container">
        <div class="main">
        <h2>A or B</h2><hr/>
        <form method="post" action="form.php">
         <hr/>
        <!---------Radio Button's starts here------> 
         <label class="heading">A:</label><br/>
          <input type="radio" name="A" value="A1">Name Of Product A1<br/>
          <input type="radio" name="A" value="A2">Name Of Product A2<br/>
          <input type="radio" name="A" value="A3">Name Of Product A3<br/>
          <input type="radio" name="A" value="A4">Name Of Product A4<br/><br/>
         <label class="heading">B:</label><br/>
          <input type="radio" name="B" value="B1">Name Of Product B1<br/>
          <input type="radio" name="B" value="B2">Name Of Product B2<br/>
          <input type="radio" name="B" value="B3">Name Of Product B3<br/>
          <input type="radio" name="B" value="B4">Name Of Product B4<br/><br/>

          <?php 
                if (isset($_POST['submit'])) {
                if(isset($_POST['A']))
                {
                 echo "First selection:<b> ".$_POST['A']."</b> <br>" ;
                }
                else{ echo "<span>Please choose.</span>";}
                }
                if (isset($_POST['submit'])) {
                if(isset($_POST['B']))
                {
                 echo "Second Selection:<b> ".$_POST['B']."</b>";
                }
                else{ echo "<span>Please choose.</span>";}
                }   
                    $radio = $_POST['A'];
                    if ($radio == 'A1') {
                    echo $A1}
                    ?>
            <hr/>
          <input type="submit" name="submit" value="Order" />
         </form>
        </div>
   </div>
  </body>
</html>

当然，当我遇到这个问题时，我在谷歌上搜索了一下，发现了这个。但当我像上面的一样实现它时，这给了我一个错误

错误：（！）分析错误：语法错误，意外的"｝"，应为"、"或"；"在C:''wamp''www''OK''form.php中，第78行

<?php
    $radio = $_POST['RadioName'];
    if ($radio == 'Value') {
    echo "Print The Price Here"}
?>

然后我发现：但这给了我错误：（！）分析错误：语法错误，意外的"｝"，应为"、"或"；"在C:''wamp''www''OK''form.php中，第81行

<?php
if ($_SERVER['REQUEST_METHOD'] === 'POST')
{
    if ($_POST['RadioName'] == "Value")
    {
        echo ""
    }
    else if ($_POST['RadioName'] == "Value2")
    {
        echo ""
    }
}
?>

当像一样实现时

<?php
if ($_SERVER['REQUEST_METHOD'] === 'POST')
{
    if ($_POST['A'] == "A1")
    {
        echo $A1
    }
    else if ($_POST['A'] == "A2")
    {
        echo $A2
    }
}
?>

还有其他解决方案吗？或者，这些解决方案中的任何一个都可以调整，使其发挥作用吗？

注意单选选项While在一个拥有相同名称但多个值的组中，并且在$_post数组中只有名称和值可用

尝试使用像checked或selected这样的子类，使用jquery。