How to develop an online learning platform using PHP and CGI-PHP Tutorial-php.cn

How to develop an online learning platform using PHP and CGI

PHPz

Release： 2023-07-23 08:16:01

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How to use PHP and CGI to develop an online learning platform

Introduction:
In recent years, with the rapid development of the Internet, online learning platforms have become the first choice for many people to acquire knowledge. When developing an efficient and stable online learning platform, PHP and CGI technologies are widely used. This article will introduce how to use PHP and CGI to develop an online learning platform, and give corresponding code examples.

1. Preparation
Before you start, you need to prepare the following tools:

A computer with a web server installed, such as Apache or Nginx;
PHP development environment, such as PHPstorm or Sublime Text;
Some basic web design knowledge and basic syntax of HTML, CSS, and JavaScript.

2. Use PHP to create a user login system

Create a database
First, we need to create a database to store user information, such as MySQL. Use the following code to create a database named "user":

CREATE DATABASE user;

Create user table
In the "user" database, create a A table named "users" is used to store user information. The table can contain the following fields: id, username, password, etc. Create a table named "users" using the following code:

CREATE TABLE users (
id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
username VARCHAR(30) NOT NULL,
password VARCHAR(30) NOT NULL
);

Create user registration page
In PHP, we can use HTML forms to create a user registration page. Code example:

<!DOCTYPE html>
<html>
<head>
<title>用户注册</title>
<style>
label, input {
display: block;
margin-bottom: 10px;
}
</style>
</head>
<body>
<form action="register.php" method="POST">
<label for="username">用户名:</label>
<input type="text" id="username" name="username" required>
<label for="password">密码:</label>
<input type="password" id="password" name="password" required>
<input type="submit" value="注册">
</form>
</body>
</html>

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Create user registration logic
In the register.php file, we can process the registration data submitted by the user and insert it into the user table. Code example:

<?php
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "user";

// 创建数据库连接
$conn = new mysqli($servername, $username, $password, $dbname);

// 检查连接是否成功
if ($conn->connect_error) {
die("连接失败: " . $conn->connect_error);
}

// 获取表单提交的用户名和密码
$username = $_POST['username'];
$password = $_POST['password'];

// 将用户名和加密后的密码插入到users表中
$sql = "INSERT INTO users (username, password) VALUES ('$username', md5('$password'))";

if ($conn->query($sql) === TRUE) {
echo "注册成功!";
} else {
echo "Error: " . $sql . "<br>" . $conn->error;
}

// 关闭数据库连接
$conn->close();
?>

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Create user login page
In PHP, we can use HTML forms to create a user login page. Code example:

<!DOCTYPE html>
<html>
<head>
<title>用户登录</title>
<style>
label, input {
display: block;
margin-bottom: 10px;
}
</style>
</head>
<body>
<form action="login.php" method="POST">
<label for="username">用户名:</label>
<input type="text" id="username" name="username" required>
<label for="password">密码:</label>
<input type="password" id="password" name="password" required>
<input type="submit" value="登录">
</form>
</body>
</html>

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Create user login logic
In the login.php file, we can process the login data submitted by the user and compare it with the data in the user table. Code example:

<?php
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "user";

// 创建数据库连接
$conn = new mysqli($servername, $username, $password, $dbname);

// 检查连接是否成功
if ($conn->connect_error) {
die("连接失败: " . $conn->connect_error);
}

// 获取表单提交的用户名和密码
$username = $_POST['username'];
$password = $_POST['password'];

// 从users表中查询匹配的用户名和密码数据
$sql = "SELECT * FROM users WHERE username='$username' AND password=md5('$password')";
$result = $conn->query($sql);

// 判断用户名和密码是否匹配
if ($result->num_rows > 0) {
echo "登录成功!";
} else {
echo "登录失败!";
}

// 关闭数据库连接
$conn->close();
?>

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3. Use CGI to create a course management system

Create a course schedule
In the "user" database, create a file named "courses" table to store course information. The table can contain the following fields: id, course_name, teacher, etc. Create a table named "courses" using the following code:

CREATE TABLE courses (
id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
course_name VARCHAR(30) NOT NULL,
teacher VARCHAR(30) NOT NULL
);

Create course list page
In PHP, we can use CGI to generate dynamic content. Create a file named "courses.cgi" to generate the course list page. Code example:

#!/usr/bin/perl

use strict;
use warnings;
use CGI;

# 创建CGI对象
my $cgi = CGI->new;

# 创建数据库连接
my $servername = "localhost";
my $username = "root";
my $password = "";
my $dbname = "user";

# 检查连接是否成功
my $dbh = DBI->connect("dbi:mysql:$dbname", $username, $password)
or die "无法连接到数据库: $DBI::errstr";

# 查询courses表中的数据
my $sth = $dbh->prepare("SELECT * FROM courses");
$sth->execute();

# 生成课程列表
my $html = "";
while (my @row = $sth->fetchrow_array) {
$html .= "<li>$row[1] - $row[2]</li>";
}

# 输出HTML页面
print $cgi->header(-charset=>'UTF-8');
print <<EOF;
<!DOCTYPE html>
<html>
<head>
<title>课程列表</title>
</head>
<body>
<h1>课程列表</h1>
<ul>
$html
</ul>
</body>
</html>
EOF

# 关闭数据库连接
$dbh->disconnect;

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Configuring CGI in the Web server
To enable CGI in the Web server, we need to set the corresponding options in the configuration file. For example, in the Apache server, we can edit the httpd.conf file and add the following lines of code to the end of the file:

<Directory "/usr/local/apache2/cgi-bin">
AllowOverride None
Options +ExecCGI
AddHandler cgi-script .cgi .pl
Require all granted
</Directory>

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IV. Summary
This article introduces how to use PHP and CGI An online learning platform is developed and corresponding code examples are given. By creating a user login system and course management system, we can build a fully functional online learning platform. I hope this article can help you better understand the application of PHP and CGI, and provide a reference for your project development.

Note: The above code examples are for demonstration purposes only, and more security and error handling measures are required in actual applications.

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