Best way to integrate a custom PHP tool in Joomla with jDownloads?

[danielfoster]

I'm using Joomla with jDownloads and have added a custom PHP-based calculation tool directly to my site    

(not as a downloadable file). The tool processes user input and shows results on the same page.

What's the recommended approach for:

Structuring custom PHP code in Joomla
Choosing between component, module, or plugin

Handling input security and performance

Avoiding conflicts with jDownloads

Any advice from Joomla + jDownloads users would be helpful.

[ColinM]

Hi
I would suggest a Joomla plugin
Colin
PS I did not think that PHP9 was available, PHP 8.5.1 was released om 18 Dec.

[Arno]

There are several tools available in the Joomla extensions for integrating PHP scripts into Joomla.
See www.joomla.org

The jDownloads forum is not the right place. Sorry.