php-data | Immutable objects for Event Engine | Microservice library

I adopted code given in this example: PHP database connection class

But i changed the code with the link above and it is as follows:

I would like to add product ID and price to the google tag manager datalayer in OXID Eshop. Is there a simple method of doing this?

I thought I might be able to edit the code suggested here: List of multiple products into php datalayer but I am too unfamiliar with oxid code.

Here is what I tried, for example:

I've just moved my application to a Flexible PHP Google App Engine and quickly found out that sharing sessions between instances didn't work that good. Just refreshing a page showed different session results every time.

I've temporarily solved it by forcing my server in the app.yaml to only use one instance. But this instance is now heavily overloaded.

I've tried to find how solve the sessions between servers and the best info I've found is this: https://github.com/GoogleCloudPlatform/google-cloud-php-datastore/blob/master/DatastoreSessionHandler.php

Although it seems like I have to rewrite a lot of my own and 3rd party scripts if I have to make to edit all scripts where it saves to sessions.

Has anyone found a way of just changing the session handler and not have to change the scripts itself to just store sessions like $_SESSION['foo'] = 'asdf' ?

Many thanks

I use a mysql query to get the following data from games played between two teams:

Trying to find a solution for this as I wish to use Bootleaf and it uses GeoJSON data. I followed one of his guide on how to convert a CSV file into a GeoJSON file structure and have managed to do that. Here is the code I have

I have seen a lot of people asking about the reverse, but what i need to do is store a string resulting from php script into localStorage?

Currently, my approach is to store the data in an attribute inside of an html element on my page like this:

Before anyone flames, I have looked at many more than just the following 3 posts. None of these have working answers.

How to Post data from a php database populated Drop Down to another script?

Passing value from a dropdown list from one php to another

What is the best way to have a dynamic dropdownlist in PHP and POST selected value

These simply just do. not. work.

Now on to my question:

I have a dropdown list on my php page that is being populated by a MySQL query. This part works perfectly. However -- I can not get the selected value from the dropdown list to post in to my next PHP script.

My code on "page1.php":

I'm doing statistics web-app with Highcharts and PHP that retrieving data from MySQL and encoding it in JSON. For now, I have various php-data files for each stat, and it's OK.

The problem is that I also did various pages for each stat, which I think is not correct way to solve problems. On pages I have same HTML code, the differences only in JS piece of Highcharts and title of the page.

Question - can I have just one page for everything, just changing JS and title on menu-click?

UPDATE: Thanks for answers, require and include are good! But what about my second question? Can I change JS piece of code if I click on some button?

So then my site would have just 1 page and various php-data. On include variant I'm anyway would have a lot of pages, cause Highcharts settings JS is unique for every stat.