Quickly Build a Simple and Practical Online Address Book System with PHP

How to Create a Simple Online Address Book System Using PHP

Introduction

With the continuous advancement of internet technology, the demand for convenient and efficient contact management tools is increasing. This article walks you through the steps to create a simple and practical online address book system using PHP, helping you grasp the fundamentals of feature implementation.

System Requirements Analysis

Before writing code, it’s important to clearly define the main functions the system should have:

• User registration and login: Users can register and log in with an account and password to ensure personal information security.
• Adding contacts: Allow users to enter contact details such as name, phone number, and email.
• Editing and deleting contacts: Enable users to modify or remove existing contacts.
• Searching contacts: Quickly find contacts using keywords.
• Importing and exporting contacts: Facilitate batch import or export of contacts to other applications.

Database Design

This system uses a MySQL database and includes two main tables:

User Table (user)

• id: Unique identifier, primary key, auto-increment.
• username: Username, unique.
• password: User password, recommended to store encrypted.

Contact Table (contact)

• id: Unique identifier, primary key, auto-increment.
• userId: Foreign key linking to user ID.
• name: Contact’s name.
• phone: Contact’s phone number.
• email: Contact’s email address.

System Implementation

Below are code snippets demonstrating the core functionalities:

User Registration and Login

// Registration and login code examples (implementation omitted)

Adding Contacts

// Add contact code examples (implementation omitted)

Editing and Deleting Contacts

// Edit and delete contact code examples (implementation omitted)

Searching Contacts

// Search contacts code examples (implementation omitted)

Importing and Exporting Contacts

// Import and export code examples (implementation omitted)

Conclusion

This article introduced the overall approach to developing a simple online address book system with PHP, covering requirement analysis, database design, and key feature implementation. The example code is straightforward and easy to understand and extend. You can enhance the system with additional features and improve the interface to better suit your needs.

We hope this tutorial helps you in mastering practical PHP project development. Happy coding!