php中存储用户ID和密码到mysql数据库的方法
创建用户信息表:
复制代码 代码如下:
CREATE TABLE tbl_auth_user (
user_id VARCHAR(10) NOT NULL,
user_password CHAR(32) NOT NULL,
PRIMARY KEY (user_id)
);
INSERT INTO tbl_auth_user (user_id, user_password) VALUES ('theadmin', PASSWORD('chumbawamba'));
INSERT INTO tbl_auth_user (user_id, user_password) VALUES ('webmaster', PASSWORD('webmistress'));
我们将使用相同的html代码来创建登录表单在上述示例中创建的。我们只需要修改登录过程有点。
登录脚本:
复制代码 代码如下:
// 我们必须永远不会忘记启动会话
session_start();
$errorMessage = '';
if (isset($_POST['txtUserId']) && isset($_POST['txtPassword'])) {
include 'library/config.php';
include 'library/opendb.php';
$userId = $_POST['txtUserId'];
$password = $_POST['txtPassword'];
// 检查用户id和密码组合存在于数据库
$sql = "SELECT user_id
FROM tbl_auth_user
WHERE user_id = '$userId'
AND user_password = PASSWORD('$password')";
$result = mysql_query($sql)
or die('Query failed. ' . mysql_error());
if (mysql_num_rows($result) == 1) {
// sessionthe设置用户id和密码匹配,
// 设置会话
$_SESSION['db_is_logged_in'] = true;
// 在登录后我们转到主页
header('Location: main.php');
exit;
} else {
$errorMessage = 'Sorry, wrong user id / password';
}
include 'library/closedb.php';
}
?>
/ /…相同的html登录表单前一个示例一样
而不是检查用户id和密码对硬编码的信息我们查询数据库,如果这两个存在于数据库使用SELECT查询。如果我们发现一个匹配我们设置会话变量和移动到主页。注意,会话的名字是前缀 “db”使它不同于先前的示例。
在接下来的两个脚本(主要。php和注销。php)代码类似于前一个。唯一的区别是会话名称。这是为这两个的代码
复制代码 代码如下:
session_start();
//是一个访问这个页面登录呢?
if (!isset($_SESSION['db_is_logged_in'])
|| $_SESSION['db_is_logged_in'] !== true) {
// 没有登录,返回到登录页面
header('Location: login.php');
exit;
}
?>
/ /…这里的一些html代码
复制代码 代码如下:
session_start();
// 如果用户已登录,设置会话
if (isset($_SESSION['db_is_logged_in'])) {
unset($_SESSION['db_is_logged_in']);
}
// 现在,用户登录,
// 去登录页面
header('Location: login.php');
?>

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











What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

MySQL and phpMyAdmin are powerful database management tools. 1) MySQL is used to create databases and tables, and to execute DML and SQL queries. 2) phpMyAdmin provides an intuitive interface for database management, table structure management, data operations and user permission management.

Oracle is not only a database company, but also a leader in cloud computing and ERP systems. 1. Oracle provides comprehensive solutions from database to cloud services and ERP systems. 2. OracleCloud challenges AWS and Azure, providing IaaS, PaaS and SaaS services. 3. Oracle's ERP systems such as E-BusinessSuite and FusionApplications help enterprises optimize operations.

IIS and PHP are compatible and are implemented through FastCGI. 1.IIS forwards the .php file request to the FastCGI module through the configuration file. 2. The FastCGI module starts the PHP process to process requests to improve performance and stability. 3. In actual applications, you need to pay attention to configuration details, error debugging and performance optimization.

Safely handle functions and regular expressions in JSON In front-end development, JavaScript is often required...

In MySQL, the function of foreign keys is to establish the relationship between tables and ensure the consistency and integrity of the data. Foreign keys maintain the effectiveness of data through reference integrity checks and cascading operations. Pay attention to performance optimization and avoid common errors when using them.

SQL is a standard language for managing relational databases, while MySQL is a database management system that uses SQL. SQL defines ways to interact with a database, including CRUD operations, while MySQL implements the SQL standard and provides additional features such as stored procedures and triggers.

The main difference between MySQL and MariaDB is performance, functionality and license: 1. MySQL is developed by Oracle, and MariaDB is its fork. 2. MariaDB may perform better in high load environments. 3.MariaDB provides more storage engines and functions. 4.MySQL adopts a dual license, and MariaDB is completely open source. The existing infrastructure, performance requirements, functional requirements and license costs should be taken into account when choosing.
