PHP development practice: building a simple blog system

PHP development practice: building a simple blog system

Introduction:
In the Internet era, blogs have become one of the important ways for people to share knowledge and record their moods. Building a simple blog system can help us better understand the principles and processes of web development. In this article, we will use PHP language to build a simple blog system, and introduce the development process in detail with relevant code examples.

1. Environment preparation
1. Install a Web server (such as Apache or Nginx)
2. Install a PHP environment (version requires PHP5)
3. Install a MySQL database

2. Database design
1. Create a database and name it blog_system
2. Design the data table
a. Create a user table (the table name is users)

 字段：id(int, 主键, 自增), username(varchar), password(varchar), email(varchar)

b. Create a blog post Table (the table name is blogs)

 字段：id(int, 主键, 自增), title(varchar), content(text), create_time(timestamp), user_id(int, 外键)

3. Project setup
1. Create a project folder and name it blog_system
2. Create the following files in the project folder:
a. index.php (blog system home page)
b.login.php (user login page)
c.register.php (user registration page)
d.dashboard.php (user background page)
e.logout.php (user logout page)
f.create_blog.php (publish blog page)
g.edit_blog.php (edit blog page)
3. Create a database connection file (named db_connect. php), use mysqli to connect to the database and provide related functions.

$servername = "localhost";
$username = "root";
$password = "password";
$dbname = "blog_system";

// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);

// Detect connection
if ($conn- >connect_error) {

die("连接失败: " . $conn->connect_error);

}

// Set character set
$conn->set_charset('utf8');

// Close connection
$conn->close();
?>

4. Page design and function implementation
1. Home page (index.php)
a. Query the database to obtain blog posts List and displayed on the page
b. Provide a link to the blog post title, click to view the blog post content

2. User login page (login.php)
a. Provide an input box to enter the user Name and password
b. Verify the user name and password by matching the database query
c. Jump to the user backend page after successful login

3. User registration page (register.php)
a. Provide an input box to enter the user name, password and email
b. Insert the registration information into the database and create a user record
c. After successful registration, jump to the user backend page

4 .User background page (dashboard.php)
a. Display relevant information of the currently logged in user
b. Provide a logout button, click to jump to the user logout page
c. Provide a publish blog button, click Jump to the blog post page
d. Query the database to obtain the current user's blog post list and display it on the page
e. Provide a link to the blog post title, click to view the blog post content
f. Provide a delete blog post button , click to delete the corresponding blog record

5. User logout page (logout.php)
a. Destroy the session data of the currently logged in user and jump to the login page

6. Publish the blog page (create_blog.php)
a. Provide an input box and enter the blog title and content
b. Insert the blog information into the database and create a blog record
c. Jump to the user backend after successful publishing Page

7. Edit blog page (edit_blog.php)
a. Query the database according to the incoming blog ID and obtain the title and content of the blog
b. Provide an input box to display the title and content of the blog post Content, and can be edited
c. After editing is completed, update the title and content of the blog post in the database

5. Summary
This article is based on PHP language, taking building a simple blog system as an example to introduce in detail development process. By completing this project, we can not only deepen our understanding of the Web development process, but also improve our PHP development capabilities. I hope that readers can better master PHP development skills by studying this article, and continuously improve their programming level in practice.

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