What are the implications of not following proper database normalization principles in PHP script development?

Not following proper database normalization principles in PHP script development can lead to data redundancy, inconsistent data, and difficulties in maintaining and updating the database. To solve this issue, it is important to design the database schema following normalization rules such as breaking down data into smaller tables and establishing relationships between them.

// Example of implementing proper normalization in PHP script development

// Create a table for users
CREATE TABLE users (
    id INT PRIMARY KEY,
    name VARCHAR(50),
    email VARCHAR(50)
);

// Create a table for user addresses
CREATE TABLE user_addresses (
    id INT PRIMARY KEY,
    user_id INT,
    address VARCHAR(100),
    city VARCHAR(50),
    state VARCHAR(50),
    zip_code VARCHAR(10),
    FOREIGN KEY (user_id) REFERENCES users(id)
);