The PHP Workshop

By : Jordi Martinez, Alexandru Busuioc, David Carr, Markus Gray, Vijay Joshi, Mark McCollum, Bart McLeod, M A Hossain Tonu

The PHP Workshop

By: Jordi Martinez, Alexandru Busuioc, David Carr, Markus Gray, Vijay Joshi, Mark McCollum, Bart McLeod, M A Hossain Tonu

Overview of this book

Do you want to build your own websites, but have never really been confident enough to turn your ideas into real projects? If your web development skills are a bit rusty, or if you've simply never programmed before, The PHP Workshop will show you how to build dynamic websites using PHP with the help of engaging examples and challenging activities. This PHP tutorial starts with an introduction to PHP, getting you set up with a productive development environment. You will write, execute, and troubleshoot your first PHP script using a built-in templating engine and server. Next, you'll learn about variables and data types, and see how conditions and loops help control the flow of a PHP program. Progressing through the chapters, you'll use HTTP methods to turn your PHP scripts into web apps, persist data by connecting to an external database, handle application errors, and improve functionality by using third-party packages. By the end of this Workshop, you'll be well-versed in web application development, and have the knowledge and skills to creatively tackle your own ambitious projects with PHP.

Preface

About the Book

Free Chapter

1. Introducing PHP

Introduction

Getting Started with PHP Web Development

HyperText Markup Language

Cascading Style Sheets

Using the Server Variable

Summary

2. Types and Operators

Introduction

What are Data Types?

Scalar Types

Operators and Expressions

Summary

3. Control Statements

Looping

Summary

4. Functions

Introduction

What is a Callable?

Language Constructs

Introduction to Built-In Functions

Introduction to User-Defined Functions

Summary

5. Object-Oriented Programming

Introduction

The Object-Oriented Approach

Interfaces

Overriding

Traits

Namespaces

Summary

6. Using HTTP

Introduction

The Request-Response Cycle of a Web Application

Query Strings

PHP Superglobals

Cross-Site Request Forgery (CSRF)

Summary

7. Data Persistence

Introduction

File I/O Handling

Databases

Summary

8. Error Handling

Introduction

Errors in PHP

Exceptions

Summary

9. Composer

Introduction

Dependency Management

Semantic Versioning

Namespaces

Summary

10. Web Services

Introduction

An Example Web Service

HTTP Headers

Summary

Appendix

1. Introducing PHP

2. Types and Operators

3. Control Statements

4. Functions

5. Object-Oriented Programming

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7. Data Persistence

Activity 7.1: Contact Management Application

Solution

Let's discuss the new or changed items, from the most uncoupled ones to the most complex ones.

A good start here is the User model class since this class will be invoked on every page for authenticated users; let's put this file inside the src/models/ directory:

Create the src/models/User.php file and add the following content.

After declaring the namespace and imports (the use keyword), we define the properties of the User class, giving names similar to the column names of the users table from the database:

<?php 
declare(strict_types=1);
namespace Models;
use DateTime;
class User
{
    /** @var int */
    private $id;
    /** @var string */
    private $username;
    /** @var string */
    private $password;
    /** @var DateTime */
 ...

The PHP Workshop

By : Jordi Martinez, Alexandru Busuioc, David Carr, Markus Gray, Vijay Joshi, Mark McCollum, Bart McLeod, M A Hossain Tonu

The PHP Workshop

By: Jordi Martinez, Alexandru Busuioc, David Carr, Markus Gray, Vijay Joshi, Mark McCollum, Bart McLeod, M A Hossain Tonu

Overview of this book

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7. Data Persistence

Activity 7.1: Contact Management Application