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

Your first PEG parser


Building a tokenizer and parser from scratch is a very tedious task. Luckily, many libraries exist that you can use to generate a parser automatically from some kind of formal grammar definition.

In PHP, you can use the hafriedlander/php-peg library to generate the PHP code for a parser for any kind of formal language that can be described by a parsing expression grammar. For this, create a new project directory and create a new composer.json file with the following contents:

{ 
  "name": "packt-php7/chp8-calculator", 
  "authors": [{ 
    "name": "Martin Helmich", 
    "email": "[email protected]" 
  }], 
 
  "require": { 
    "hafriedlander/php-peg": "dev-master" 
  }, 
  "autoload": { 
    "psr-4": { 
      "Packt\\Chp8\\DSL": "src/" 
    }, 
    "files": [ 
      "vendor/hafriedlander/php-peg/autoloader.php" 
    ] 
  } 
} 

Note that the hafriedlander/php-peg library does not use a PSR-0 or PSR-4 autoloader, but it ships its own class loader instead. Because...