Conventions used

There are a number of text conventions used throughout this book.

Code in text: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: “The test class name needs to be suffixed with Test, and it extends the PHPUnit\Framework\TestCase class.”

A block of code is set as follows:

<?php
namespace App\Validator;
use App\Model\ToyCar;
use App\Model\ValidationModel;
interface ToyCarValidatorInterface
{
    public function validate(ToyCar $toyCar): ValidationModel;

Any command-line input or output is written as follows:

$ cd docker
$ docker-compose build && docker-compose up -d

Bold: Indicates a new term, an important word, or words that you see onscreen. For instance, words in menus or dialog boxes appear in bold. Here is an example: “Paste the script into the text area and click on the Commit File button.”

Tips or important notes

Appear like this.