PROSAGA码农传奇-运筹学-HTML表单复选框无法在PHP中输出值

HTML表单复选框无法在PHP中输出值

作者: 流浪海。
发布时间: 2024-05-09 06:00:55 (2月前)
转自：

<div class =“post-text”itemprop =“text”>
   <pre>
    <code>
      <?PHP
    if(isset($_POST['submit']))
    {
        $useful_classes = $_POST['useful_classes'];
?>
        <table>
            <tr>
                <td class="title" align="right" > <b>Most Useful Classes:</b> </td>
                <td class="values" align="left" > 
                <?php
                    foreach ($useful_classes as $useful_classes){ 
                        echo $useful_classes . ",";
                    }
                ?>

</td>
            </tr>
        </table>
<?php 
    }
?>

<form action="" method="post">
<table>
    <tr>
        <td>
            <input type="checkbox" name="useful_classes[]" value="Engineering Economics">
            <td align="left">Engineering Economics
            </td>
    </tr>
    <tr>
        <td>
            <input type="checkbox" name="useful_classes[]" value="Operations Research">
            <td align="left">Operations Research
            </td>
    </tr>
    <tr>
        <td>
            <input type="checkbox" name="useful_classes[]" value="Simulation">
            <td align="left">Simulation
            </td>
    </tr>
    <input type="submit" name="submit">
</table>
</form>

</code>
  </pre>
  <P>
    而不是你可以轻松地做到这一点
    <a href="https://www.w3schools.com/php/func_string_implode.asp" rel="nofollow noreferrer">
      内爆功能
    </A>
  </p>
   <pre>
    <code>
      if(isset($_POST['submit']))
    {
        echo   $useful_classes = implode(",",$_POST['useful_classes']);

}

</code>
  </pre>
</DIV>