Book Image

PHP 7 Programming Blueprints

By : Jose Palala, Martin Helmich
Book Image

PHP 7 Programming Blueprints

By: Jose Palala, Martin Helmich

Overview of this book

When it comes to modern web development, performance is everything. The latest version of PHP has been improvised and updated to make it easier to build for performance, improved engine execution, better memory usage, and a new and extended set of tools. If you’re a web developer, what’s not to love? This guide will show you how to make full use of PHP 7 with a range of practical projects that will not only teach you the principles, but also show you how to put them into practice. It will push and extend your skills, helping you to become a more confident and fluent PHP developer. You’ll find out how to build a social newsletter service, a simple blog with a search capability using Elasticsearch, as well as a chat application. We’ll also show you how to create a RESTful web service, a database class to manage a shopping cart on an e-commerce site and how to build an asynchronous microservice architecture. With further guidance on using reactive extensions in PHP, we’re sure that you’ll find everything you need to take full advantage of PHP 7. So dive in now!

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PHP 7 Programming Blueprints
Jose Palala | Martin Helmich
Oct, 2016 | 320 pages
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Table of Contents (15 chapters)
PHP 7 Programming Blueprints
PHP 7 Programming Blueprints
Credits
Credits
About the Authors
About the Authors
About the Reviewer
About the Reviewer
www.PacktPub.com
www.PacktPub.com
Preface
Preface
Free Chapter
1
Create a User Profile System and use the Null Coalesce Operator
Create a User Profile System and use the Null Coalesce Operator
The null coalesce operator
Separation of Concerns
Creating views
Create a profile input form
Admin system
Summary
2
Build a Database Class and Simple Shopping Cart
Build a Database Class and Simple Shopping Cart
Building the database abstraction class
Shopping Cart
Installing TCPDF
Admin for managing purchases
Summary
3
Building a Social Newsletter Service
Building a Social Newsletter Service
Authentication system
Summary
4
Build a Simple Blog with Search Capability using Elasticsearch
Build a Simple Blog with Search Capability using Elasticsearch
Creating the CRUD and admin system
5
Creating a RESTful Web Service
Creating a RESTful Web Service
RESTful basics
First steps with the Slim framework
Implementing the REST service
Streams and large files
Summary
6
Building a Chat Application
Building a Chat Application
The WebSocket protocol
First steps with Ratchet
Implementing the chat application
Deployment options
Bridging Ratchet and PSR-7 applications
Accessing your application via the web server
Adding authentication
Summary
7
Building an Asynchronous Microservice Architecture
Building an Asynchronous Microservice Architecture
The target architecture
ZeroMQ patterns
Bootstrapping the project
Building the inventory service
Making the inventory service multithreaded
Building the checkout service
Building the mailing service
Building the shipping service
Bridging ZeroMQ and HTTP
Summary
8
Building a Parser and Interpreter for a Custom Language
Building a Parser and Interpreter for a Custom Language
How interpreters and compilers work
Languages and grammars
Your first PEG parser
Evaluating expressions
Building an Abstract Syntax Tree
Building a better interface
Evaluating variables
Adding logical expressions
Working with structured data
Working with objects
Optimizing the interpreter by adding a compiler
Verifying performance improvements
Summary
9
Reactive Extensions in PHP
Reactive Extensions in PHP
An introduction to observables
Introduction to event loop and ReactiveX
Parsing logs through a Reactive scheduler
Event queues with ReactiveX
Summary

The WebSocket protocol

In this chapter, we'll be working extensively with WebSockets. To fully understand the workings of the chat application that we're going to build, let's first have a look at how WebSockets work.

The WebSockets protocol is specified in RFC 6455 and uses HTTP as the underlying transport protocol. In contrast to the traditional request/reply paradigm, in which the client sends a request to the server, who then replies with a response message, WebSocket connections can be kept open for a long time, and both server and client can send and receive messages (or data frames) on the WebSocket.

WebSocket connections are always initiated by the client (so, typically, a user's browser). The following listing shows an example request that a browser might send to a server supporting WebSockets:

GET /chat HTTP/1.1 
Host: localhost 
Upgrade: websocketConnection: upgrade 
Origin: http://localhost 
Sec-WebSocket-Key: de7PkO6qMKuGvUA3OQNYiw==

Sec-WebSocket-Protocol: chat

Sec-WebSocket...
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