Joomla 1.5 , 2.5 and 3.0 have many diffrences lets check some of their diffrences:-
– Joomla 3.0 and Joomla 2.5 Provide there admin theme so we can make changes in the admin theme.
– Joomla 3.0 has been created to support the Mobile Device also.
– Every 6 Months Joomla gives new version with some changes and good features.
– Old Joomla gives 7 months support , when new releas comes while doing one click the system is upgraded.
– If we are creating new site than Joomla 3.0 is much more preferable.
– Sites which are currently running on 2.5 then no need to upgrade they can wait for newer version like 3.5.
– We need to check extentions for their availability on the supporting version of Joomla.
– Approximately Joomla 2.5 Modules/Component/Plugins will work in Joomla 3.0 but not in 1.5.
– We can use Jupgrade component for upgrading from 1.5 to 2.5.
– Before Upgrading please take backup of database and source .
– Before Upgrading please check component availability for the latest version.
– If you have made any changes in core file then that change will be gone.
– XCloner is used to back up your site.
– Main diffrence between Joomla 1.5 and 2.5 is there some extra functionality added like Joomla Smart Search , Multi Database Support, More choice for Offline Modes , User Registration With Captcha , Mobile Enhancements , Multilanguage Support , Subcategory Filter.
– A new Access Control System (ACL) which enable the site developer to create unlimited groups and combinations of permissions, removing one of the biggest limitations of Joomla 1.5 and 1.0. Control exactly what users can view and can do on your website. This feature will increase the capability of Joomla to tackle a much wider range of online applications.
– 2.5 contain unlimited sub category level and removed the section.
– 2.5 Has one click upgrade functionality.
– SEO improvements
– Simple and one click package Installation.
– General Improvements
– Custom text blacklists in articles
– Support for Microsoft IIS server and MS SQL