To get the most out of this book

Basic knowledge of PHP, JavaScript, HTML, and CSS is required. You also need a computer, a browser, a code editor, and an internet connection with the following working environment:

• An Apache web server
• PHP version 7.3 or higher (most sections of the book work with PHP 5.6.20+)
• WordPress version 5.3.2 or higher
• MySQL version 5.6+, or MariaDB 10.0+

You will need WordPress installed on your computer. All code examples have been tested using WAMP Server 3.1.9. However, they should work with any operating system with the preceding requirements.

Software/hardware covered in the book	OS requirements
WordPress 5.3.2	Any OS
MySQL 5.6 or greater, or MariaDB 10.0 or greater	Any OS
Apache web server	Any OS
PHP 5.6.20+ (7.3 is recommended)	Any OS
FileZilla Client 3.47+, or any file transfer client program	Any OS
phpMyAdmin 5.0.1+, or any database administration tool	Any OS

If you are using the digital version of this book, we advise you to type the code yourself or access the code via the GitHub repository (link available in the next section). Doing so will help you avoid any potential errors related to the copying and pasting of code.

Download the example code files

You can download the example code files for this book from your account at www.packt.com. If you purchased this book elsewhere, you can visit www.packtpub.com/support and register to have the files emailed directly to you.

You can download the code files by following these steps:

1. Log in or register at www.packt.com.
2. Select the Support tab.
3. Click on Code Downloads.
4. Enter the name of the book in the Search box and follow the onscreen instructions.

Once the file is downloaded, please make sure that you unzip or extract the folder using the latest version of:

• WinRAR/7-Zip for Windows
• Zipeg/iZip/UnRarX for Mac
• 7-Zip/PeaZip for Linux

The code bundle for the book is also hosted on GitHub at https://github.com/PacktPublishing/WordPress-5-Cookbook. In case there's an update to the code, it will be updated on the existing GitHub repository.

We also have other code bundles from our rich catalog of books and videos available at https://github.com/PacktPublishing/. Check them out!

Conventions used

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

CodeInText: 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: "Mount the downloaded WebStorm-10*.dmg disk image file as another disk in your system."

A block of code is set as follows:

add_filter( 'product_type_selector', 'wpccp_chapter9_add_product');
function wpccp_chapter9_add_product( $product_types ){
    $product_types[ 'simple_wpccp_support_package' ] = __( 'Support 
    Package' ,'wpccp' );
    return $product_types;
}

// Step 8 code should be placed after this line

Bold: Indicates a new term, an important word, or words that you see onscreen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "Select System info from the Administration panel."

Warnings or important notes appear like this.

Tips and tricks appear like this.