除了 1 个 PHP 变量外，$_POST 中的所有其他数据都在获取

Question

我试图从使用 POST 方法中选择数据，而 echo except once 会显示所有内容。

<div>

<div class="modal-dialog" role="document">

  <div class="modal-content">

    <div class="modal-header">

      <h5 class="modal-title" id="exampleModalLabel">Update User Profile</h5>

      <button class="close" type="button" data-dismiss="modal" aria-label="Close">

      </button>

    </div>

  <div class="modal-body">

  <form class="user" method="post">

      <div class="form-group row">

          <div class="col-sm-6 mb-3 mb-sm-0">

              <input type="text" class="form-control form-control-user" name="first_name" value="<?php echo $firstname; ?>">

          </div>

          <div class="col-sm-6">

              <input type="text" class="form-control form-control-user" name="first_name" value="<?php echo $lastname; ?>">

          </div>

      </div>

          <div class="form-group">

            <input type="email" class="form-control form-control-user" name="user_email" value="<?php echo $email; ?>">

          </div>

          <div class="form-group">

            <input type="number" class="form-control form-control-user" name="user_phone" value="<?php echo $phone; ?>">

          </div>

      <div class="form-group row">

          <div class="col-sm-6 mb-3 mb-sm-0">

            <input type="password" class="form-control form-control-user" name="password" placeholder="Password">

          </div>

          <div class="col-sm-6">

            <input type="password" class="form-control form-control-user" name="confirmPassword" placeholder="Confirm Password">

          </div>

      </div>

    </div>

    <div class="modal-footer">

      <a class="btn btn-secondary" href="charts.php">Back to List</a>

      <button class="btn btn-primary" name="update-user-profile" href="">Update Profile</button>

    </div>

  </div>

</div>

<?php

Answer 1

首先，你没有使用<form></form>标签。您已两次使用名称为 firstname 的输入，因此您没有获得 lastname 选项。<div class="col-sm-6 mb-3 mb-sm-0">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <input type="text" class="form-control form-control-user" name="first_name" value="<?php echo $firstname; ?>">&nbsp; &nbsp; &nbsp; </div>&nbsp; &nbsp; &nbsp; <div class="col-sm-6">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <input type="text" class="form-control form-control-user" name="last_name" value="<?php echo $lastname; ?>">&nbsp; &nbsp; &nbsp; </div>在上面的代码中，我将 first_name 更改为 last_name。所以如果你改变它，整个事情应该有效。