JSON (JavaScript Object Notation) is a light-weight data interchange format used to create an API (Application Programming Interface) for your web application, desktop software, or mobile app. JSON format is easier to read and write than formats such as XML (Extensible Markup Language). This guide explains how to query a MySQL database and format the data in JSON format with PHP on a Vultr Ubuntu 20.04 server. To follow along with this guide, ensure you have the following: * A Vultr Ubuntu 20.04......