PHP 7 Data Structures and Algorithms

Conventions

In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.

Codes are written with a different font from the book text fonts to highlight the code block.

 

A block of code is set as follows:

[default]class TreeNode {    public $data = NULL;    public $children = [];    public function __construct(string $data = NULL) {         $this->data = $data;    }    public function addChildren(TreeNode $node) {         $this->children[] = $node;    }}

When we wish to draw your attention to a particular part of a code block during the explanation, the code is highlighted within the text like this: addChildren.

 

Any command-line input or output is written ...