使用 PHP 的显示名称 - display name using PHP

<html>
<head>
<script>
function addstafflist()
{
    for(var i = 0; i < document.getElementById("stafflist").options.length; i++)
    {
        if(document.getElementById("stafflist").options[i].selected)
        {
             var staffname = document.getElementById("stafflist").options[i].text;
             var selectedstaffnamelist = document.getElementById("selectedstafflist");
             var found = false;
         for(var j = 0; j < selectedstaffnamelist.length; j++)
         {
             if(selectedstaffnamelist[j].text == staffname)
             {
                found = true;
                break;
             }
         }
        if(!found)
        {
            var option = document.createElement("option");
            option.text = staffname;
            selectedstaffnamelist.add(option);
        }
    }
}
</script>
</head>
<body>
<form action="test2.php" method="post">
<table border="0" width="300" style="border-collpase:collapse">
  <tr>
    <td width="50">
      <select id="stafflist" name="stafflist[]" style="width:70px;" multiple>
        <option value="ali@gmail.com">ali</option>
        <option value="abu@gmail.com">abu</option>
        <option value="ahmad@gmail.com">ahmad</option>
      </select>
    </td>
    <td width="30">
      <input type="button" name="add" value=">>" onclick="addstafflist()" />
    </td>
    <td>
      <select id="selectedstafflist" name="selectedstafflist[]" style="width:70px;" multiple>
      </select>
    </td>
  </tr>
  <tr height="20">
    <td colspan="3">
      <input type="submit" name="submit" value="Show" />
    </td>
  </tr>
</table>
</form>
</body>
</html>
<?php
if(isset($_POST['submit']))
{
    //[HERE]
}
?>

从上面的代码中，当我从下拉列表中选择ali，abu并单击"显示"按钮时，我想在单击[HERE]部分中的"显示"按钮后使用PHP显示其电子邮件地址(即 ali@gmail.com，abu@gmail.com(。有人可以帮助我吗？

通过所有已发布的员工列表和回显电子邮件添加以下代码;

<?php
if(isset($_POST['submit']))
{
    foreach($_POST['stafflist'] as $email){
        echo $email . "<br/>";
    }
}
?>

虽然我不确定你使用你所有的JS是为了什么。

我为您的代码提供了一些建议。这是一种正确的方法，您需要验证您的提交：

<html>
    <head>
        <title>Example</title>
    </head>
    <body>
        <?php
        // If stafflist is array(), then you can go to loop
        if(is_array($_POST['stafflist']))
        {
            // Run the loop
            foreach($_POST['stafflist'] as $email)
            {
                // Show all emails per line
                echo $email . "<br/>";
            }
        }    
        ?>
        <form action="test2.php" method="post">
            <table border="0" width="300" style="border-collpase:collapse">
              <tr>
                <td width="50">
                  <select id="stafflist" name="stafflist[]" style="width:70px;" multiple>
                    <option value="ali@gmail.com">ali</option>
                    <option value="abu@gmail.com">abu</option>
                    <option value="ahmad@gmail.com">ahmad</option>
                  </select>
                </td>
                <td width="30">
                  <input type="button" name="add" value=">>" onclick="addstafflist()" />
                </td>
                <td>
                  <select id="selectedstafflist" name="selectedstafflist[]" style="width:70px;" multiple>
                  </select>
                </td>
              </tr>
              <tr height="20">
                <td colspan="3">
                  <input type="submit" name="submit" value="Show" />
                </td>
              </tr>
            </table>
        </form>
        <script>
            // Put all JS before end of body
            function addstafflist()
            {
                for(var i = 0; i < document.getElementById("stafflist").options.length; i++)
                {
                    if(document.getElementById("stafflist").options[i].selected)
                    {
                         var staffname = document.getElementById("stafflist").options[i].text;
                         var selectedstaffnamelist = document.getElementById("selectedstafflist");
                         var found = false;
                     for(var j = 0; j < selectedstaffnamelist.length; j++)
                     {
                         if(selectedstaffnamelist[j].text == staffname)
                         {
                            found = true;
                            break;
                         }
                     }
                    if(!found)
                    {
                        var option = document.createElement("option");
                        option.text = staffname;
                        selectedstaffnamelist.add(option);
                    }
                }
            }
        </script>
    </body>
</html>

我使用了克里斯蒂亚诺的 php 建议来首先检查 POST 是否是一个数组。我也同意最好将 javascript 放在结束正文标签附近，这样脚本越多，页面渲染的延迟就越少。另一个小心代码嵌套的好建议。它使阅读和调试更容易...缺少支架会让您失去宝贵的时间。;)

迈克尔，我只在你的代码中添加了 3 行。我使用了正确的 POST，即选定的 POST。测试工作。

<html>
<head>
    <title>Example</title>
</head>
<?php
if(isset($_POST['submit']))
{
    //[HERE]
    // If stafflist is array(), then you can go to loop
    if(is_array($_POST['stafflist']))
    {
        foreach($_POST['selectedstafflist'] as $email){
            echo $email . "<br/>";
        }
    }
}
?>
<body>
<form action="test2.php" method="post">
    <table border="0" width="300" style="border-collpase:collapse">
        <tr>
            <td width="50">
                <select id="stafflist" name="stafflist[]" style="width:70px;" multiple>
                    <option value="ali@gmail.com">ali</option>
                    <option value="abu@gmail.com">abu</option>
                    <option value="ahmad@gmail.com">ahmad</option>
                </select>
            </td>
            <td width="30">
                <input type="button" name="add" value=">>" onclick="addstafflist()" />
            </td>
            <td>
                <select id="selectedstafflist" name="selectedstafflist[]" style="width:70px;" multiple>
                </select>
            </td>
        </tr>
        <tr height="20">
            <td colspan="3">
                <input type="submit" name="submit" value="Show" />
            </td>
        </tr>
    </table>
</form>
<script>
function addstafflist()
{
    for(var i = 0; i < document.getElementById("stafflist").options.length; i++)
    {
        if(document.getElementById("stafflist").options[i].selected)
        {
            var staffname = document.getElementById("stafflist").options[i].text;
            var staffemail = document.getElementById("stafflist").options[i].value;         // <-- Added this line
            var selectedstaffnamelist = document.getElementById("selectedstafflist");
            var found = false;
            for(var j = 0; j < selectedstaffnamelist.length; j++)
            {
                if(selectedstaffnamelist[j].text == staffname)
                {
                    found = true;
                    break;
                }
            }
            if(!found)
            {
                var option = document.createElement("option");
                option.text = staffname;
                option.value = staffemail;          // <-- Added this line
                option.selected=true;               // <-- Added this line
                selectedstaffnamelist.add(option);
            }
        }
    }
}   // <-- Added this missing bracket
</script>
</body>