Allow a PHP script to run only through CLI

How to restrict the execution of a PHP script to CLI (Command Line Interface) only (so it doesn’t run through the browser).

Restricting access to WordPress REST API

Learn how to restrict access to the WordPress REST API to improve the security of your WordPress site.

Preventing direct access to PHP files in a WordPress site

Implement this best practice of preventing direct access to PHP files to improve the security of your WordPress site.

Sanitizing array values in WordPress

Learn how to sanitize an array of email addresses in WordPress.