A basic PHP/MySQL/HTML Billing APP. Meant for developers learning.
Here is PHP/MySQL/HTML code that is a sample Entry Level Billing APP. It is Free, and mostly for learning purposes. You can install on a Windows or linux server, and look at the PHP code files on your PC.
IDE written in a single HTML file that runs on the browser tab.
There is no need to install, download a single file and run anywhere.
To change the initial configuration, edit the widew.html file in the last lines.
* Widew use CodeMirror components in code editor.
URLs:
https://soluc.org/widew
https://widew.sourceforge.io