How to check for current version of XenForo?

[Jaxel]

I am using the following code in XenPorta to check for pre-installed versions.

public static function installCode($existingAddOn, $addOnData)
{
    if ($existingAddOn['version_id'] < 50)
    {
        throw new XenForo_Exception('Old version found and must be uninstalled first', true);
    }
}

How would I find similar data for the current version of XenForo?

 

[Pereira]

A detailed explanation:

http://xenforo.com/community/resources/how-to-check-xenforo-version-during-an-add-on-install.1987/