I was wondering if there's any way to upgrade my Joomla 2.5 website, with VM2 and a template for Joomla 2.5, to Joomla 3. Downloading afterwards the same template and some other plugins and components for that version...
You won't lose any data, however be sure to take a backup of your current 2.5 site before starting the update– LodderMar 24, 2015 at 11:18
What about if I use a Joomla 2.5 template on Joomla 3...?– AntonioMar 24, 2015 at 11:32
A few errors will most likely be thrown which could be fixed, but it might be easier to download the Joomla 3.x compatible version of your template– LodderMar 24, 2015 at 11:33
You should setup a local dev environment and try it. Making use of Akeeba Backup. If you ancounter issues post them and we will try help.– jonboyMar 24, 2015 at 11:40
The question is very frequent. At this time, you can find many answers. Just do your research to find the best answer for you.
For instance, this is one of the possible answers: Upgrade from 2.5 to 3.x overview