PHP realizes jumping to the page after submitting the form-PHP Problem-php.cn

PHP realizes jumping to the page after submitting the form

王林

Release： 2023-05-24 18:16:38

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For websites that use PHP to process forms, jumping to the page after the form is submitted is a very common function. This article will introduce in detail how to use PHP to jump to the specified page after the form is submitted.

In order to jump to the page after the form is submitted, we need to follow the following steps:

Define the HTML form

First, we need to Define a form in . The following is a simple example, including two input boxes for username and password and a submit button:

<form action="login.php" method="post">
  <label for="username">用户名：</label>
  <input type="text" id="username" name="username">
  <br>
  <label for="password">密码：</label>
  <input type="password" id="password" name="password">
  <br>
  <input type="submit" value="提交">
</form>

Copy after login

In this form, we set the action attribute to "login.php", which means that when the user When the form is submitted, the data is sent to the login.php file for processing.

Define PHP handler

Next, we need to define a PHP file to process the form data. In this file, we can get the data in the form and perform some logical operations. When the logic processing is completed, we need to jump to the specified page.

The following is an example of a simple login handler (login.php):

<?php
// 获取表单数据
$username = $_POST['username'];
$password = $_POST['password'];

// 执行验证操作
if ($username == 'admin' && $password == '123456') {
  // 验证通过，跳转到成功页面
  header('Location: success.php');
} else {
  // 验证失败，跳转到失败页面
  header('Location: error.php');
}

Copy after login

In this handler, we first obtain the username and password parameters from the form. We then performed some logic to validate the user-submitted data. If the verification passes, we can use the PHP function header() to jump to the success page (success.php) or to the failure page (error.php), which page depends on the verification result.

It should be noted that there cannot be any output before using the header() function to jump to the page. Otherwise, a "headers already sent" error may occur when performing a jump operation.

Define the jump page

Finally, we need to define the HTML and CSS of the jump page. Generally speaking, when jumping to a successful page, we will display a prompt message to tell the user that the operation is successful. When jumping to the failed page, we need to display the corresponding error message to tell the user what went wrong.

The following is an example of a simple success page (success.php):

<!DOCTYPE html>
<html>
<head>
  <title>操作成功</title>
  <style>
    .message {
      margin: 100px auto;
      width: 400px;
      text-align: center;
      font-size: 24px;
      color: green;
    }
  </style>
</head>
<body>
  <div class="message">
    操作成功！
  </div>
</body>
</html>

Copy after login

In this page, we define a prompt message to tell the user that the operation is successful. We used CSS to style the message and center it on the page.

Similarly, we can define an error message for the failed page and apply the corresponding CSS style.

Summary

Through the above steps, we can process the form through PHP and jump to the page after the form is submitted. This is a very common function and is often used in actual development. It should be noted that when jumping to a page, you must pay attention to the output to avoid errors.

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