[SOLVED] Get Key value from an Edit page

I have an ID column which is the Key value of the table. This is an identity column and should not be inserted and/or editable. The column is not checked via the Fields => Add/Edit boxes. It is only visible on the List page. However, I do need access to the ID value from the "Before record updated" area. Normally I would obtain the value by setting a variable similar to the following:

$requestid=$values["ID"];

This method works for all fields that are selected to be visible on the add/edit pages, however the value is not returned since this key value is not visible. From Javascript I would run something similar to the following:

var url_string = window.location.href;
var url = new URL(url_string);
var requestid = url.searchParams.get("editid1");

This approach would create the variable and capture the value of the ID column since it is part of the key for the table.

How would I go about getting the value from PHP code in the Before record updated section?

Any help would be much appreciated.