environment/hash variable in an onchange event?

[homa]

How can I retrieve the available environment/hash variable in an onchange event with a file?
The browser console throws the following error:

Code: Select all

Uncaught ReferenceError: nuHash is not defined
    onchange http://192.168.1.78/index.php:3
2 index.php:3:22

Code: Select all

nuChangeFile(event);alert("Datei onchange"); // Initial report for verification
// nuDebug(nuHash());
console.log("Hash:", nuHash()); // in Browser-Console visible

[steven]

Hi homa,

nuHash() is only a PHP function.

What value are you trying access?


Steven

[homa]

Hi Steven,
Thank you for opening my eyes. In the heat of the moment, I forgot to consider the client and server sides — and therefore JavaScript (JS) and PHP.
My first step should be to work with the hash variables.
I plan to load files into the database, retrieve the file name and type, and store these in two additional database fields.
The second step would be to load the PDF files from the database and display them to the user in the browser. But one thing at a time.
As a beginner with nuBuilder, I am currently struggling to handle and edit variables and other database fields. Could you offer any advice?
Matthias

[steven]

Matthias,

We'll need to know more about what you're trying to do.

If you are able to upload a copy of your current database or provide some screenshots, that would be good.


Steven

[kev1n]

I agree with Steven; we need more details.
Specifically, we need to know how you are loading data into the database. Are you using the nuBuilder File object (Uppy) or another method?
Only then can we provide targeted help, since the answer depends heavily on the method being used.

[homa]

I'm happy to explain. Sorry for the late reply, but work got in the way.
I want to use a form to save a file to the database. However, I want to save the file name and type separately in DB fields. I was planning to use the onChange function for this. But would it be better to do it with PHP on the server side?
I'm open to ideas!
If that works, I'd like to be able to display a saved file (preferably a PDF) again, but that's step two!
Here are some screenshots of my progress so far:

2025-09-25 18_48_31-nuBuilder - Dokumente – Mozilla Firefox.png

2025-09-25 18_50_26-nuBuilder - Dokumente (dok) – Mozilla Firefox.png

2025-09-25 18_51_41-nuBuilder - Dokumente (dok) – Mozilla Firefox.png

2025-09-25 19_03_19-192.168.1.78 _ localhost _ nubuilder4 _ dokumente _ phpMyAdmin 5.2.2 – Mozilla F.png