From Joomla 2.5 to Joomla 3.x is NOT an UPGRADE but a (mini) MIGRATION!
We describe here the processes to migrate you from Joomla 2.5.28 to Joomla 3.x (latest)
|PHP (Magic Quotes GPC off)||5.6 or 7.0+||5.3.10|
|MySQL (InnoDB support required)||5.5.3+||5.1|
Once again (and make a note of what you are doing on a piece of paper so you will remember!) before doing anything yet go and check all extensions (templates/components/plugin/modules) and make sure that any of these extensions are Joomla 3.x compatible. For sure when you have installed a Joomla 2.5 template you will need to change this with a Joomla 3.x compatible template.
In general you can see in the Joomla Extension Directory pretty clear that an extension is compatible. (note: sometimes extension developers do not update their account on JED so double check on their website we suggest?)
Just look at this example image to understand what it means: If it shows, as per this example of Virtuemart, you can be assured that the extension is Joomla 3.x compatible an is available!
If it only shows the 2.5-icon rest assured the extension is not (yet) available for Joomla 3.x! This means that you have to wait or have to find an extension that IS available for Joomla 3.x...
This is what you will have to do with all your extensions! Make an inventory what is and what is not compatible with Joomla 3.x!
Tip: Go to ExtensionsManageand here you will easy find all non-joomla extensions that have been installed
When you have written down this we go to Step 3!
Go to your admin panel and be very careful...Do not do this when your are tired, too much coffee, do not feel good etc... You should be fresh and have a clear mind!!!!
Go to Manage Extensions > and choose "components" : delete those components that are not compatible with Joomla 3.x and do the same for successively "modules" and "plugins" Please be careful and do not delete things you have not changed. Do not delete any Joomla stuff for sure! Do NOT delete what you before in Step 3 have upgraded
Be Careful & Precise!
Disable Remember-me System Plugin (Essential!)
Now when you are done we are going to get your site to Joomla 3.x !
We will be happy to assist you with your migration to Joomla 3.x. The fee for an upgrade or a migration depends on the size of the site. Get your quote for your upgrade or migration to the latest Joomla version!