Detailed explanation of operating MySQL database with PHP (3)
Administrator login background module
Implement the administrator login background module, which mainly includes:
1. Data table Design
2. Login process design
3. Login code
4. Login check code
1. Administrator data table——007_admin
| Field name | Explanation |
|---|---|
| id | Record id, automatically generated |
| username | Username |
| password | Password |
| name | Administrator name |
| tel | Phone number |
| lastloginip | Last login IP |
| lastlogintime | Last login time |
| loginhits | Total number of logins |
| status | AccountStatus, 1 enabled, 0 disabled |
| addate | Account creation date |
2. Login flow chart
3. Login implementation
Login Pagelogin.php
<!--login.php-->
<!DOCTYPE html>
<html >
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Detailed explanation of operating MySQL database with PHP (3)</title>
</head>
<body>
<form name="form1" method="post" action="login_check.php">
<table width="500" border="1" bordercolor="#ccc" rules="all" align="center" cellpadding="5">
<tr>
<th colspan="2" bgcolor="#ccc">Detailed explanation of operating MySQL database with PHP (3)</th>
</tr>
<tr>
<td width="80" align="right">用户名：</td>
<td><input type="text" name="username" /></td>
</tr>
<tr>
<td align="right">密码：</td>
<td><input type="password" name="password"/></td>
</tr>
<tr>
<td> </td>
<td>
<input type="submit" value="登录"/>
<input type="hidden" name="ac" value="login"/> <!--隐藏域，向服务器隐式传值，用于表单验证-->
</td>
</tr></table></form></body></html>Running effect
## Enter After entering the account and password, click Login and you will be redirected to the login check page (login_check.php)
4. Login check pagelogin_check.php <!--login_check.php-->
<?php
//********************Detailed explanation of operating MySQL database with PHP (3)检查**********************
//连接MySQL数据库include "conn.php";
//判断表单是否提交if(isset($_POST['ac']) && $_POST['ac']=='login'){
//获取表单提交的数据
$username = $_POST['username'];
$password = md5($_POST['password']);
//md5() 对密码进行加密
//构建要查询的SQL语句
$sql = "SELECT * FROM 007_admin WHERE username='$username' AND password='$password'"; //执行SQL语句
$result = mysql_query($sql); //获取结果集中的记录数
$records = mysql_num_rows($result); //判断是否匹配
if($records){ //匹配
//获取相关变量信息
$lastloginip = $_SERVER['REMOTE_ADDR'];
$lastlogintime = time(); //构建更新记录的SQL语句
$sql = "UPDATE 007_admin SET lastloginip='$lastloginip', lastlogintime=$lastlogintime, loginhits=loginhits+1 WHERER username='$username'";
//执行SQL语句
mysql_query($sql); //跳转到成功页面
$url = "manage.php"; $message = "Detailed explanation of operating MySQL database with PHP (3)成功！";
header("location:success.php?url=$url&message=$message");
}else{ //未匹配
$message = urlencode("用户名或密码不正确！");
header("location:error.php?message=$message");
}
}else{ //如果非法操作
$message = urlencode("非法操作！");
header("location:error.php?message=$message");
}?>Copy after login
<!--login_check.php-->
<?php
//********************Detailed explanation of operating MySQL database with PHP (3)检查**********************
//连接MySQL数据库include "conn.php";
//判断表单是否提交if(isset($_POST['ac']) && $_POST['ac']=='login'){
//获取表单提交的数据
$username = $_POST['username'];
$password = md5($_POST['password']);
//md5() 对密码进行加密
//构建要查询的SQL语句
$sql = "SELECT * FROM 007_admin WHERE username='$username' AND password='$password'"; //执行SQL语句
$result = mysql_query($sql); //获取结果集中的记录数
$records = mysql_num_rows($result); //判断是否匹配
if($records){ //匹配
//获取相关变量信息
$lastloginip = $_SERVER['REMOTE_ADDR'];
$lastlogintime = time(); //构建更新记录的SQL语句
$sql = "UPDATE 007_admin SET lastloginip='$lastloginip', lastlogintime=$lastlogintime, loginhits=loginhits+1 WHERER username='$username'";
//执行SQL语句
mysql_query($sql); //跳转到成功页面
$url = "manage.php"; $message = "Detailed explanation of operating MySQL database with PHP (3)成功！";
header("location:success.php?url=$url&message=$message");
}else{ //未匹配
$message = urlencode("用户名或密码不正确！");
header("location:error.php?message=$message");
}
}else{ //如果非法操作
$message = urlencode("非法操作！");
header("location:error.php?message=$message");
}?>Code PS:
After jumping to the login check page, the account and password entered by the administrator will be matched with the records in the database. When the entered account and password are correct (that is, the match is successful) ), jump to the login success page (success.php); otherwise, if the match is unsuccessful, jump to the login failure page (error.php).md5() function
- Description: Calculate the MD5 hash value of the string
- Description: Return the hash value in the form of a 32-character hexadecimal number
- Note: The encryption algorithm of md5 is no longer safe
- Example: md5("123456") =e10adc3949ba59abbe56e057f20f883e
$_SERVER[]
- Description: Obtain server execution environment information.
- $_SERVER[“REMOTE_ADDR”] //Client’s IP address
- $_SERVER[“SERVER_ADDR”] //Server’s IP address
Login success page success.php<!--success.php-->
<?php$message=urldecode($_GET["message"]);
$url=trim($_GET["url"]);?>
<!DOCTYPE><html><head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>操作成功</title>
<style type="text/css">
*{margin:0px;padding:0px;}.box{
width:450px;
border:1px solid #f0f0f0;
background:#FFFFCC;
margin:100px auto;
padding:20px;
font-size:14px;
line-height:180%;
color:#444;}h2{margin-bottom:10px;}
#time{color:#FF0000;
}.
.color2{color:#0099FF;}
a.a1:link,a.a1:visited{color:#0099FF;text-decoration:none;}
a.a1:hover{color:#FF0000;text-decoration:underline;}
</style></head><body><p class="box">
<h2 id="操作成功">操作成功</h2>
<p><b>提示：<?php echo $message;?></b></p>
<p>系统将在 <span id="time">5</span> 秒钟后自动跳转，如果不想等待，请点击 <a class="a1" href="<?php echo $url?>">这里</a> 跳转。</p>
</p></body></html><script language="javascript">function playSec(num){
//获取id=time的元素对象
var time = document.getElementById("time");
time.innerHTML = num; if(--num >0)
{
window.setTimeout("playSec("+num+")",1000);
}else
{
location.href="<?php echo $url?>";
}
}
playSec(5);</script>Copy after loginRunning effect
<!--success.php-->
<?php$message=urldecode($_GET["message"]);
$url=trim($_GET["url"]);?>
<!DOCTYPE><html><head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>操作成功</title>
<style type="text/css">
*{margin:0px;padding:0px;}.box{
width:450px;
border:1px solid #f0f0f0;
background:#FFFFCC;
margin:100px auto;
padding:20px;
font-size:14px;
line-height:180%;
color:#444;}h2{margin-bottom:10px;}
#time{color:#FF0000;
}.
.color2{color:#0099FF;}
a.a1:link,a.a1:visited{color:#0099FF;text-decoration:none;}
a.a1:hover{color:#FF0000;text-decoration:underline;}
</style></head><body><p class="box">
<h2 id="操作成功">操作成功</h2>
<p><b>提示：<?php echo $message;?></b></p>
<p>系统将在 <span id="time">5</span> 秒钟后自动跳转，如果不想等待，请点击 <a class="a1" href="<?php echo $url?>">这里</a> 跳转。</p>
</p></body></html><script language="javascript">function playSec(num){
//获取id=time的元素对象
var time = document.getElementById("time");
time.innerHTML = num; if(--num >0)
{
window.setTimeout("playSec("+num+")",1000);
}else
{
location.href="<?php echo $url?>";
}
}
playSec(5);</script>
After 5 seconds, jump to the news management page (manage.php). The news management page operates the MySQL database in
PHP(4)middle.
Login failure page error.php
The code for failed login is similar to the code for successful login.Running effect
After 5 seconds, jump to the login page (login.php) and wait for the administrator Re-enter the account password.
The above is the detailed content of Detailed explanation of operating MySQL database with PHP (3). 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 and Python: Different Paradigms Explained
Apr 18, 2025 am 12:26 AM
PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.
PHP and Python: A Deep Dive into Their History
Apr 18, 2025 am 12:25 AM
PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.
Laravel Introduction Example
Apr 18, 2025 pm 12:45 PM
Laravel is a PHP framework for easy building of web applications. It provides a range of powerful features including: Installation: Install the Laravel CLI globally with Composer and create applications in the project directory. Routing: Define the relationship between the URL and the handler in routes/web.php. View: Create a view in resources/views to render the application's interface. Database Integration: Provides out-of-the-box integration with databases such as MySQL and uses migration to create and modify tables. Model and Controller: The model represents the database entity and the controller processes HTTP requests.
Solve database connection problem: a practical case of using minii/db library
Apr 18, 2025 am 07:09 AM
I encountered a tricky problem when developing a small application: the need to quickly integrate a lightweight database operation library. After trying multiple libraries, I found that they either have too much functionality or are not very compatible. Eventually, I found minii/db, a simplified version based on Yii2 that solved my problem perfectly.
The Continued Use of PHP: Reasons for Its Endurance
Apr 19, 2025 am 12:23 AM
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.
Laravel framework installation method
Apr 18, 2025 pm 12:54 PM
Article summary: This article provides detailed step-by-step instructions to guide readers on how to easily install the Laravel framework. Laravel is a powerful PHP framework that speeds up the development process of web applications. This tutorial covers the installation process from system requirements to configuring databases and setting up routing. By following these steps, readers can quickly and efficiently lay a solid foundation for their Laravel project.
MySQL and phpMyAdmin: Core Features and Functions
Apr 22, 2025 am 12:12 AM
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.
MySQL vs. Other Programming Languages: A Comparison
Apr 19, 2025 am 12:22 AM
Compared with other programming languages, MySQL is mainly used to store and manage data, while other languages such as Python, Java, and C are used for logical processing and application development. MySQL is known for its high performance, scalability and cross-platform support, suitable for data management needs, while other languages have advantages in their respective fields such as data analytics, enterprise applications, and system programming.
