Bootstrap Radio按钮组选择空 /空返回值

Question

会感谢我向我解释的人，为什么我在尝试获得无线电按钮组时只从PHP中获得一个空字符串。

$currentlyemployed = null;
if (isset($currentlyemployedyes)) {
  $currentlyemployed = "Yes";
}
else {
  $currentlyemployed = "No";
}

注意：同一表单中的文本输入，我可以获得它们的值。

示例片段：

开始表单标记

<div class="row">
<div class="col-sm-6 text-left">
   <h5>Are you currently employed?</h5>
      <div class="control-group">
         <div class="controls">
            <label>
               <input type="radio" id="currentlyemployedyes" name="currentlyemployed" value="yes" />Yes</label>
            <label>
               <input type="radio" id="currentlyemployedno" name="currentlyemployed" value="no" />No</label>
             <p class="help-block"></p>
          </div>
       </div>
    </div>
</div>

结束表单标记

开始PHP代码段

$currentlyemployed = $_POST['currentlyemployed']; RETURNS empty string
/* FYI
$currentlyemployedyes = $_POST['currentlyemployedyes']; RETURNS "Yes"
$currentlyemployedno = $_POST['currentlyemployedno']; RETURNS "No"
*/

结束PHP代码段

Answer 1

您已按预期编写的代码。您可以查看下面的摘要。引导是否无关紧要。name="currentlyemployed"从表单发送到PHP服务器，然后将其绑定到$_POST关联全局数组中。

 <?php 
    echo "<pre>";
      var_dump($_POST);
    echo "</pre>";
      echo "Currently Employed: ".$_POST['currentlyemployed'];
    ?>
    <hr>
    <div class="row">
    <div class="col-sm-6 text-left">
      <form method="POST">
         <h5>Are you currently employed?</h5>
            <div class="control-group">
               <div class="controls">
                  <label>
                     <input type="radio" id="currentlyemployedyes" name="currentlyemployed" value="yes" />Yes</label>
                  <label>
                     <input type="radio" id="currentlyemployedno" name="currentlyemployed" value="no" />No</label>
                   <p class="help-block"></p>
                </div>
             </div>
             <input type="submit">
        </form>
        </div>
    </div>

Answer 2

我不认为这是合法的"答案"，而是一个"工作"。

想提供归因，但忘记我发现的地方，甚至可能已经在堆栈溢出上。

                <div class="row">
                    <div class="col-sm-6 text-left">
                        <h5>Are you currently employed?</h5>
                        <div class="control-group">
                            <div class="controls">
                                <label>
                                    <input type="radio" id="currentlyemployedyes" name="currentlyemployed" value="yes" **onclick="$('#currentlyemployed').val('Yes');"** />
                                    Yes</label>
                                <label>
                                    <input type="radio" id="currentlyemployedno" name="currentlyemployed" value="no" **onclick="$('#currentlyemployed').val('No');"** />
                                    No</label>
                                <p class="help-block"></p>
                            </div>
                            **<input name="currentlyemployed" id="currentlyemployed" type="hidden" value="" />**
                        </div>
                    </div>
                </div>