为什么我的提交按钮不起作用? - Why doesn't my submit button work?

当用户单击一个模态时，该表单可用。当我在模态中点击提交按钮时，它不起作用。

foreach ($posts as $post) { echo '
    <td>
      <button type="button" class="btn btn-success" data-toggle="modal" data-target="#$id_user">Validasi</button>
    </td>
  </tr>
</tbody>
';
}

语气:

echo '
<div id="$id_user" class="modal fade" tabindex="-1" role="dialog" aria-hidden="true">
  <div class="modal-dialog modal-sm">
    <div class="modal-content" id="registerContent">
      <div class="modal-header">
        <button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
        <div class="modal-text-header text-center">Validasi</div>
      </div>
      <div class="modal-body">
        <div class="container-fluid">'; echo '
          <form class="form col-md-12 center-block" action="http://localhost/MMM/admin/validasi/'.$id_user.'" method="POST" enctype=' "multipart/form-data'">
            <div class="form-group">
              <input class="form-control input" placeholder="Dana awal (RP.1.000.000,-)" type="text" name="dana">
            </div>
            <div class="form-group">
              <input type="submit" class="btn btn-primary btn btn-block" name="submit" value="Submit">
            </div>
          </form>
        </div>
      </div>
      <div class="modal-footer">
        <div class="col-md-12">
          <button class="btn" data-dismiss="modal" aria-hidden="true">Cancel</button>
        </div>
      </div>
    </div>
  </div>
</div>' ;

您需要检查提交按钮是否已传递，然后运行代码。这将确保您不会得到一个未定义的索引错误。

if (isset($_POST['submit'])) {
 // Your code here.
}

也使用form (<form></form>)标签在method="post"中指定POST请求

错误信息

<form>打开和关闭位置错误
enctype=' "multipart/form-data'"， (').

所以最终的良好形式代码是

<div id="$id_user" class="modal fade" tabindex="-1" role="dialog" aria-hidden="true">
    <div class="modal-dialog modal-sm">
        <div class="modal-content" id="registerContent">
            <div class="modal-header">
                <button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
                <div class="modal-text-header text-center">Validasi</div>
            </div>
            <form class="form col-md-12 center-block" action="http://localhost/MMM/admin/validasi/'.$id_user.'" method="POST" enctype="multipart/form-data">
                <div class="modal-body">
                    <div class="container-fluid">
                        <div class="form-group">
                            <input class="form-control input" placeholder="Dana awal (RP.1.000.000,-)" type="text" name="dana">
                        </div>
                        <div class="form-group">
                            **
                            <input type="submit" class="btn btn-primary btn btn-block" name="submit" value="Submit">**
                        </div>
                    </div>
                </div>
                <div class="modal-footer">
                    <div class="col-md-12">
                        <button class="btn" data-dismiss="modal" aria-hidden="true">Cancel</button>
                    </div>
                </div>
            </form>
        </div>
    </div>
</div>

注意:您没有在您的表单中上传任何Files。所以没有使用enctype

不要使用单引号的echo:那是让你头痛的地方。创建如下代码:

<div id="<?php echo $id_user ?>" class="modal fade" tabindex="-1" role="dialog" aria-hidden="true">
  <div class="modal-dialog modal-sm">
    <div class="modal-content" id="registerContent">
      <div class="modal-header">
        <button type="button" class="close" data-dismiss="modal" aria-hidden="true">x</button>
        <div class="modal-text-header text-center">Validasi</div>
      </div>
      <div class="modal-body">
        <div class="container-fluid">
          <form class="form col-md-12 center-block" action="http://localhost/MMM/admin/validasi/<?php echo $id_user ?>" method="POST" enctype="multipart/form-data">
            <div class="form-group">
              <input class="form-control input" placeholder="Dana awal (RP.1.000.000,-)" type="text" name="dana">
            </div>
            <div class="form-group">
              <input type="submit" class="btn btn-primary btn btn-block" name="submit" value="Submit">
            </div>
          </form>
        </div>
      </div>
      <div class="modal-footer">
        <div class="col-md-12">
          <button class="btn" data-dismiss="modal" aria-hidden="true">Cancel</button>
        </div>
      </div>
    </div>
  </div>
</div>

和其他代码:

<?php 
foreach ($posts as $post): ?>
<td>
  <button type="button" class="btn btn-success" data-toggle="modal" data-target="#$id_user">Validasi</button>
</td>
<?php endforeach; ?>

在PHP中单引号和双引号字符串的区别是什么?