PHP+MYSQL会员系统的登陆即权限判断实现代码_php基础
error_reporting(0);
session_start();
//数据库连接
$conn = mysql_connect('localhost', 'root', '');
mysql_select_db('chenkun', $conn);
mysql_query('SET NAMES UTF-8');
//定义常量
define('ALL_PS', 'PHP');
function user_shell($uid, $shell, $m_id) {
$sql = "select * from admin where uid='$uid'";
$query = mysql_query($sql);
$row = mysql_fetch_array($query);
$shell = is_array($row) ? $shell == md5($row['username'] . $row['password'] . ALL_PS) : FALSE;
if ($shell) {
if ($row['m_id'] return $row;
}
echo "你的权限不足";
exit ();
} else {
echo "你无权限访问该页";
exit ();
}
}
function user_mktime($onlinetime) {
$new_time = mktime();
if (($new_time - $onlinetime) > '900') {
session_destroy();
echo "登陆超时";
exit ();
} else {
$_SESSION['times'] = mktime();
}
}
?>
PHP+MYSQL会员系统的登陆即权限判断
包含三个页面,cogfig页面是被包含页面。denglu页面负责提交,session赋值等,denglu_link页面负责权限判断的演示。
本例事先已存在test数据库,user_list表,表中有uid,m_id,username,password四个字段。并且password字段已经经过md5加密,形式是:md5("用户密码".ALL_PS),即用户输入的密码加常量进行加密。
config.php页面:
//启动session
session_start();
//数据库连接
$conn=mysql_connect('localhost','root','******');
mysql_select_db('test',$conn);
//定义常量
define("ALL_PS","php100");
//判断权限函数
function user_shell($uid,$shell){
$sql="SELECT * FROM `user_list` WHERE `uid` = '$uid'";
$query=mysql_query($sql);
$exist=is_array($row=mysql_fetch_array($query));
$exist2=$exist?$shell==md5($row['username'].$row['password'].ALL_PS):FALSE;
if($exist2){
return $row;
}else{
echo "你无权限访问该页";
exit();
}
}
?>
denglu.php页面:
include("config.php");
if($_POST['submit']){
$username=str_replace(" ","",$_POST['username']); //去除空格
$sql="SELECT * FROM `user_list` WHERE `username` = '$username'";
$query=mysql_query($sql);
$exist=is_array($row=mysql_fetch_array($query)); //判断是否存在这样一个用户
$exist2=$exist?md5($_POST['password'].ALL_PS)==$row['password']:FALSE;//判断密码
if($exist2){
$_SESSION['uid']=$row['uid']; // session赋值
$_SESSION['user_shell']=md5($row['username'].$row['password'].ALL_PS);
echo "登陆成功";
}else{
echo "不正确的用户名";
SESSION_DESTROY();
}
}
?>
denglu_link
denglu_link.php页面:
include("config.php");
$arr=user_shell($_SESSION['uid'],$_SESSION['user_shell']);//以上两句即可对权限进行判断
echo $arr['username'];
?>
权限内容

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

AI Hentai Generator
Generate AI Hentai for free.

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

Go language is an efficient, concise and easy-to-learn programming language. It is favored by developers because of its advantages in concurrent programming and network programming. In actual development, database operations are an indispensable part. This article will introduce how to use Go language to implement database addition, deletion, modification and query operations. In Go language, we usually use third-party libraries to operate databases, such as commonly used sql packages, gorm, etc. Here we take the sql package as an example to introduce how to implement the addition, deletion, modification and query operations of the database. Assume we are using a MySQL database.

How to use MySQLi to establish a database connection in PHP: Include MySQLi extension (require_once) Create connection function (functionconnect_to_db) Call connection function ($conn=connect_to_db()) Execute query ($result=$conn->query()) Close connection ( $conn->close())

Hibernate polymorphic mapping can map inherited classes to the database and provides the following mapping types: joined-subclass: Create a separate table for the subclass, including all columns of the parent class. table-per-class: Create a separate table for subclasses, containing only subclass-specific columns. union-subclass: similar to joined-subclass, but the parent class table unions all subclass columns.

Apple's latest releases of iOS18, iPadOS18 and macOS Sequoia systems have added an important feature to the Photos application, designed to help users easily recover photos and videos lost or damaged due to various reasons. The new feature introduces an album called "Recovered" in the Tools section of the Photos app that will automatically appear when a user has pictures or videos on their device that are not part of their photo library. The emergence of the "Recovered" album provides a solution for photos and videos lost due to database corruption, the camera application not saving to the photo library correctly, or a third-party application managing the photo library. Users only need a few simple steps

HTML cannot read the database directly, but it can be achieved through JavaScript and AJAX. The steps include establishing a database connection, sending a query, processing the response, and updating the page. This article provides a practical example of using JavaScript, AJAX and PHP to read data from a MySQL database, showing how to dynamically display query results in an HTML page. This example uses XMLHttpRequest to establish a database connection, send a query and process the response, thereby filling data into page elements and realizing the function of HTML reading the database.

Analysis of the basic principles of the MySQL database management system MySQL is a commonly used relational database management system that uses structured query language (SQL) for data storage and management. This article will introduce the basic principles of the MySQL database management system, including database creation, data table design, data addition, deletion, modification, and other operations, and provide specific code examples. 1. Database Creation In MySQL, you first need to create a database instance to store data. The following code can create a file named "my

PHP is a back-end programming language widely used in website development. It has powerful database operation functions and is often used to interact with databases such as MySQL. However, due to the complexity of Chinese character encoding, problems often arise when dealing with Chinese garbled characters in the database. This article will introduce the skills and practices of PHP in handling Chinese garbled characters in databases, including common causes of garbled characters, solutions and specific code examples. Common reasons for garbled characters are incorrect database character set settings: the correct character set needs to be selected when creating the database, such as utf8 or u

How to integrate GoWebSocket with a database: Set up a database connection: Use the database/sql package to connect to the database. Store WebSocket messages to the database: Use the INSERT statement to insert the message into the database. Retrieve WebSocket messages from the database: Use the SELECT statement to retrieve messages from the database.
