How to implement simple password login in php
php method to implement simple password login: 1. Create login.html; 2. Create login.php; 3. Process user login information; 4. Set the default homepage index.php; 5. Create a logout page. Can.
The operating environment of this article: Windows 7 system, PHP version 7.1, DELL G3 computer
How to achieve simple password login in php?
PHP implements the simplest login interface
This is the first complete minimal project on the road to learning PHP. Finally, I have seen it With the hope of doing a project, I specially made a record
Login interface:
html code (login.html):
<form action="login.php" method="post"> <fieldset> <legend>用户登录</legend> <ul> <li> <label>用户名:</label> <input type="text" name="username"> </li> <li> <label>密 码:</label> <input type="password" name="password"> </li> <li> <label> </label> <input type="checkbox" name="remember" value="yes">7天内自动登录 </li> <li> <label> </label> <input type="submit" name="login" value="登录"> </li> </ul> </fieldset> </form>
login.php: (Login processing page)
<?php header('Content-type:text/html; charset=utf-8'); // 开启Session session_start(); // 处理用户登录信息 if (isset($_POST['login'])) { # 接收用户的登录信息 $username = trim($_POST['username']); $password = trim($_POST['password']); // 判断提交的登录信息 if (($username == '') || ($password == '')) { // 若为空,视为未填写,提示错误,并3秒后返回登录界面 header('refresh:3; url=login.html'); echo "用户名或密码不能为空,系统将在3秒后跳转到登录界面,请重新填写登录信息!"; exit; } elseif (($username != 'username') || ($password != 'password')) { # 用户名或密码错误,同空的处理方式 header('refresh:3; url=login.html'); echo "用户名或密码错误,系统将在3秒后跳转到登录界面,请重新填写登录信息!"; exit; } elseif (($username = 'username') && ($password = 'password')) { # 用户名和密码都正确,将用户信息存到Session中 $_SESSION['username'] = $username; $_SESSION['islogin'] = 1; // 若勾选7天内自动登录,则将其保存到Cookie并设置保留7天 if ($_POST['remember'] == "yes") { setcookie('username', $username, time()+7*24*60*60); setcookie('code', md5($username.md5($password)), time()+7*24*60*60); } else { // 没有勾选则删除Cookie setcookie('username', '', time()-999); setcookie('code', '', time()-999); } // 处理完附加项后跳转到登录成功的首页 header('location:index.php'); } } ?>
index.php (Default home page):
<?php header('Content-type:text/html; charset=utf-8'); // 开启Session session_start(); // 首先判断Cookie是否有记住了用户信息 if (isset($_COOKIE['username'])) { # 若记住了用户信息,则直接传给Session $_SESSION['username'] = $_COOKIE['username']; $_SESSION['islogin'] = 1; } if (isset($_SESSION['islogin'])) { // 若已经登录 echo "你好! ".$_SESSION['username'].' ,欢迎来到个人中心!<br>'; echo "<a href='logout.php'>注销</a>"; } else { // 若没有登录 echo "您还没有登录,请<a href='login.html'>登录</a>"; } ?>
logout.php Logout page
<?php header('Content-type:text/html; charset=utf-8'); // 注销后的操作 session_start(); // 清除Session $username = $_SESSION['username']; //用于后面的提示信息 $_SESSION = array(); session_destroy(); // 清除Cookie setcookie('username', '', time()-99); setcookie('code', '', time()-99); // 提示信息 echo "欢迎下次光临, ".$username.'<br>'; echo "<a href='login.html'>重新登录</a>"; ?>
Successful login status:
If you check Automatically log in within 7 days, the login information will be saved in the local cookie file through Cookie and Session technology, and you will be logged in automatically within 7 days.
Logout page:
Several situations of login errors have been processed:
I learned PHP by myself by watching videos. I just started, this is my first small project, please don’t hit me with ‘\holding fists’
Recommended learning: "PHP Video Tutorial"
The above is the detailed content of How to implement simple password login in php. For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati

If you are an experienced PHP developer, you might have the feeling that you’ve been there and done that already.You have developed a significant number of applications, debugged millions of lines of code, and tweaked a bunch of scripts to achieve op

Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c

JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,

A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total

This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an

Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.

What are the magic methods of PHP? PHP's magic methods include: 1.\_\_construct, used to initialize objects; 2.\_\_destruct, used to clean up resources; 3.\_\_call, handle non-existent method calls; 4.\_\_get, implement dynamic attribute access; 5.\_\_set, implement dynamic attribute settings. These methods are automatically called in certain situations, improving code flexibility and efficiency.
