Ubuntu – How to upgrade Xampp to the newest version

This might seem like a silly question but by golly I've tried and tried for a whole week and no results.
I don't know if it's something wrong with my queries, or too much "Install Xampp" clutter in my search results (and not Upgrade Xampp) – But I just can't find a solution that works on my server.

I've got Ubuntu Server 12.04 (Terminal only), and on it phpstatus = 5.4.7 (i.e. Xampp version is 5.4.7).

I want to upgrade said Xampp (Lampp…) to the latest, which according to the file downloaded from apachefriends com – is 5.6.3

I've tried the following two sets of instructions (which strangely enough are the ONLY ones I managed to find online) to no avail. After using either apt-get or the bitnami GUI (via SSH with PuTTy + Xming) – the command phpstatus still outputs 5.4.7

I've even tried both methods under the actual root user on the device. No success there either.

After reading the apachefriends FAQ I thought that in order to upgrade, all I need to do is install Xampp in it's newest version right over the old Xampp installation. But maybe it's not the case?

Please – I need some help here. How do I upgrade my Xampp and why isn't it working with the methods I've tried?

Here are the two methods I've tried. Copied directly as I found them online:

Ensure the XAAMP repository is added:

sudo add-apt-repository ppa:upubuntu-com/xampp

Then update with:

sudo apt-get update

That was one method, here's the other:

How do I install XAMPP?

Choose your flavor for your linux OS, the 32-bit or 64-bit version.

Change the permissions to the installer

chmod 755 xampp-linux-*-installer.run

Run the installer

sudo ./xampp-linux-*-installer.run

That's all. XAMPP is now installed below the /opt/lampp directory.

What could I be missing?