Book Image

Mastering PHP 7

By : Branko Ajzele
Book Image

Mastering PHP 7

By: Branko Ajzele

Overview of this book

PHP is a server-side scripting language that is widely used for web development. With this book, you will get a deep understanding of the advanced programming concepts in PHP and how to apply it practically The book starts by unveiling the new features of PHP 7 and walks you through several important standards set by PHP Framework Interop Group (PHP-FIG). You’ll see, in detail, the working of all magic methods, and the importance of effective PHP OOP concepts, which will enable you to write effective PHP code. You will find out how to implement design patterns and resolve dependencies to make your code base more elegant and readable. You will also build web services alongside microservices architecture, interact with databases, and work around third-party packages to enrich applications. This book delves into the details of PHP performance optimization. You will learn about serverless architecture and the reactive programming paradigm that found its way in the PHP ecosystem. The book also explores the best ways of testing your code, debugging, tracing, profiling, and deploying your PHP application. By the end of the book, you will be able to create readable, reliable, and robust applications in PHP to meet modern day requirements in the software industry.
Table of Contents (24 chapters)
Title Page
Credits
About the Author
About the Reviewers
www.PacktPub.com
Customer Feedback
Preface
16
Debugging, Tracing, and Profiling

Object iteration


The PHP arrays are the most frequent collection structure used in PHP. We can squeeze pretty much anything into an array, ranging from scalar values to objects. Iterating through elements of such a structure is trivially easy using the foreach statement. However, arrays are not the only iterable types, as objects themselves are iterable.

Let's take a look at the following array-based example:

<?php

$user = [
  'name' => 'John',
  'age' => 34,
  'salary' => 4200.00
];

foreach ($user as $k => $v) {
  echo "key: $k, value: $v" . PHP_EOL;
}

Now let's take a look at the following object-based example:

<?php

class User
{
  public $name = 'John';
  public $age = 34;
  public $salary = 4200.00;
}

$user = new User();

foreach ($user as $k => $v) {
  echo "key: $k, value: $v" . PHP_EOL;
}

Executed on the console, both of these examples would yield an identical output:

key: name, value: John 
key: age, value: 34 
key: salary, value: 4200

By default, iteration works...