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!
Table of Contents (15 chapters)
PHP 7 Programming Blueprints
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Preface
4
Build a Simple Blog with Search Capability using Elasticsearch

ZeroMQ patterns


In this chapter, you will learn about the basic communication patterns that are supported by ZeroMQ. Do not worry if all that sound a bit theoretical; you will implement all of these patterns yourself throughout the chapter.

Request/reply pattern

The ZeroMQ library supports a variety of different communication patterns. For each of these, you will need different ZeroMQ socket types. The easiest communication pattern is the Request/reply pattern, in which a client opens an REQ socket and connects to a server listening on an REP socket. The client sends a request that is then replied to by the server.

ZeroMQ Request/Reply sockets

It's important to know that REQ and REP sockets are always synchronous. Each REQ socket can be sending requests to a single REP socket at a time, and more importantly, each REP socket can also only be connected to a single REQ socket at a time. The ZeroMQ library even enforces this on the protocol level and triggers errors when an REQ socket tries to...