Implementing digital filters in PHP?

Question

PHP

Hello.
So I have the following problem. I'm doing my diploma at my university. I have a task to develop a web interface for a large system. The diploma has a mandatory section - Digital Signal Processing. The problem is that I do not have the signals themselves, there is only an array of values, points, stored in the database.
In fact, in my diploma there is no digital processing and signals at all, but since This section is mandatory, then it must be.
Those. I need to take an array of points and values ​​received from certain devices and stored in the database in XML format (thank God these values ​​are real, you don’t need to invent them) and run it through some kind of filter (it doesn’t matter which Chebyshev, Butterworth or something else) which).
Simply put, I need a software implementation of some kind of filter in PHP. So that I can take XML from the database, extract an array of data from there and run it through this filter.
Yandex and Google say that I'm a fool and no one needs this, and no one has done this. In matlab-simulink, please, but not in PHP.
So, please, question. If anyone has something similar. Or in general some kind of software implementation of a certain digital filter? Even if not in PHP, but in C ++, Java, or simply on spherical pseudocode in a vacuum. The main thing is that PHP can be rewritten.

Answer 1

Take a look at libDSP © and SciPy (Python) - you might find something useful for yourself.