Reading a value into a variable from the url (webserver and esp8266)

I'm looking for an option so that when I type in, for example, 111.111.111/on:50, the number 50 goes from a variable(the link formula may look different, but what's important to me is that any number entered in place of 50 is taken to a variable). I can't find this anywhere, I don't know why, maybe I've been looking wrong. (I am doing everything on the ESP8266WiFi.h DNSServer.h libraries ESP8266WebServer.h WiFiManager.h on arudino esp8266 )

Please help me a lot and thank you in advance.

PS. for embracing the http server in general I used this: https://randomnerdtutorials.com/wifimanager-w...-parameter-and-manage-your-ssid-and-password/ (the first code, not the second).
In this video something like this has been done, but I don't know how to interpret it, so I would ask possibly to clean up the code and leave the script itself concerning such data retrieval with a detailed explanation: https://www.youtube.com/watch?v=XuAw4IDy_0A&t=265s

If I have chosen the wrong forum then please feel free to move.

A more orthodox notation would be:

111.111.111?on=50

And that 'on' would be the name of the GET variable and '50' its value.
And especially as you use a colon, it wakes up my flashing orange light.

Unfortunately, in view of the multitude of "libraries" with the same name, I can't help as to the guts of their code

Ok, that works for me. It can be on other libraries-I'll accommodate. Do you happen to have a link to a tutorial?

You give full links of the aforementioned libraries, then maybe something can be analysed and hinted at.
Unfortunately but e.g. the ESP8266WiFi "blibliotek" is at least 10.

Ok, thanks. This is where I think I found something, but I don't know if it will be ok, but I think it is.
Link to the video: https://www.youtube.com/watch?v=TUYqDyHV7Ng&t=233s
Link to the code: https://github.com/G6EJD/ESP8266-WebServer-Ge...Arguments_from_Client_for_Mulitple_Inputs.ino

At 66%, I would say that the "library" you previously used should also have HTTP call argument chunking. This is how it has intuition.

I'd suggest deepening your knowledge of the specific reaslocation, including the most basic: reading that library especially the server class (that's in arduino akurat are not alarming amounts of code) - rather than jumping from flower to flower based on the chaos that google renders.

Thank you for your advice, I will definitely take it .