为什么我的“提交”按钮不起作用？

Question

当用户单击模式时，该表格可用。 当我单击模式中的“提交”按钮时，该按钮不起作用。

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>
';
}

这是模态：

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>' ;

Answer 1

您需要检查是否已通过“提交”按钮，然后运行代码。 这将确保您不会收到未定义的索引错误。

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

还可以使用表单（ <form></form> ）标记在method="post"指定POST请求。

Answer 2

不要在单引号上使用echo：这就是让您头痛的原因。 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; ?>

还请阅读PHP中单引号和双引号字符串之间的区别是什么？

Answer 3

错误

1. <form>错误放置会导致打开和关闭
2. enctype=\\ "multipart/form-data\\" ，（ \\ ）中的enctype=\\ "multipart/form-data\\"字符。

因此， 最终格式正确的代码是

<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：您没有上载表单中的任何Files 。 所以不使用enctype