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How to implement user login to jump to another interface in PHP

PHPz

Apr 03, 2023 pm 02:09 PM

In website development, user login is a very basic function. After the user successfully logs in, we hope to jump to the user's personal center or other pages, which requires the login jump operation.

This article will introduce how PHP implements the operation of user login jumping to another interface.

First, we need to verify the username and password entered by the user. This can be done by querying the database or other methods. If the username and password match, it means the user has been authenticated and can proceed to the next step.

Here, we assume that we have completed the login verification operation.

Set Session value

After passing the verification, we need to store the user's information in the Session. Session is a mechanism for storing user data on a web server. In PHP, we can set and read Session values through the built-in $_SESSION variable.

The following is an example of storing the username in the Session variable when the user is authenticated:

session_start(); // 启动Session
$_SESSION['username'] = 'John'; // 存储用户名

Copy after login

Here, we first open the Session, and then use the $_SESSION variable to The user's username is stored in the Session.

Jump to another page

When the user is authenticated and the Session value has been set, we can redirect him to another page.

PHP provides the header() function to implement the redirection function. Here is an example:

header('Location: http://example.com/myaccount.php');
exit;

Copy after login

Here, we use the header() function to redirect the user to the http://example.com/myaccount.php page. After the redirection operation is completed, we use the exit() function to exit the program.

It should be noted that if any HTML or other content is output before the header() function, the redirection function will fail. Therefore, do not set the header() function before an explicit echo or print statement.

Sample code

The following is a complete sample code for PHP login jump:

<?php
session_start();

// 进行用户验证
$username = &#39;John&#39;; // 用户名
$password = &#39;password123&#39;; // 密码

if ($_POST[&#39;username&#39;] === $username && $_POST[&#39;password&#39;] === $password) {
  $_SESSION[&#39;username&#39;] = $username;  // 存储用户名
  header(&#39;Location: http://example.com/myaccount.php&#39;); // 重定向到用户主页
  exit; // 退出程序
}
?>
<!DOCTYPE html>
<html>
<head>
  <title>Login Page</title>
</head>
<body>
  <form name="login" action="login.php" method="post">
    <input type="text" name="username" placeholder="Username"><br>
    <input type="password" name="password" placeholder="Password"><br>
    <input type="submit" value="Login">
  </form>
</body>
</html>

Copy after login

Here, we first open the Session. We then use a simple if statement for user validation. If the user is authenticated, we store their username in the Session and use the header() function to redirect the user to the http://example.com/myaccount.php page.

If the user fails verification, he will stay on the current page.

Summary

In this article, we introduced how to use PHP to implement user login and jump to another page. We store user information through Session and use the header() function to implement page redirection. These techniques can be applied to every web application that requires user login.

However, it should be noted that login verification technology is only part of ensuring user identity security. In practical applications, we need to consider more security measures to ensure the security of our web applications.

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