Developer Pack allow you to view PHP information, download WordPress site source code with advanced options, and online code editing with a powerful code editor. You don’t have to use FTP or SSH anymore.
Developer Pack is built for the developers/freelancers. If you don’t know how to code PHP or how WordPress work, it is massive dangerous. Please only install it when you know what you are doing!
Remember: This plugin can modify your file system. Use it wisely!
