How can normalization principles be applied to improve the database structure in PHP applications?

Issue: Normalization principles help in reducing data redundancy and improving data integrity in a database structure. To apply normalization principles in PHP applications, we need to ensure that data is organized into separate tables based on their relationships, and that each table contains unique and non-redundant information. PHP Code Snippet: 

// Example of applying normalization principles in PHP database structure

// Create a users table to store user information
CREATE TABLE users (
    id INT PRIMARY KEY,
    username VARCHAR(50) UNIQUE,
    email VARCHAR(100) UNIQUE
);

// Create a posts table to store post information related to users
CREATE TABLE posts (
    id INT PRIMARY KEY,
    user_id INT,
    title VARCHAR(255),
    content TEXT,
    FOREIGN KEY (user_id) REFERENCES users(id)
);

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