How to Enable Legacy Mode in Joomla! 1.5

The future of Joomla! CMS, Jomla! version 1.5, has new framework with code based for the Joomla! core completely re-written and built with PHP 5. Thus, a lot of existing extensions, plugins, templates and modules for Joomla! version 1.0.x does not work or fail to work properly in the Joomla! 1.5, sometimes not even able to upload and install the package. Users will get error messages such as “Direct Access to this location is not allowed” and “Must Enable Legacy Mode In Global Config To Complete This Task.” Joomla! developers is kind enough to provide a legacy mode in Joomla! 1.5 that supports compatibility with extensions designed and developed for older version of Joomla.

So how to enable and switch on legacy mode in Joomla! 1.5? In early beta release of Joomla! 1.5 (e.g. beta1 and beta2), option to enable and turn on the legacy mode is part of the Global Configuration. However, in the latest RC release of Joomla! (i.e Joomla! 1.5RC3) and final gold release of Joomla! 1.5, the legacy mode support has been moved to be provided by plugin. Thus to enable the legacy mode, simply follow steps in trick below to publish the Legacy Mode plug-in.

  1. Login to Joomla! 1.5 Site Administrator panel (http://www.domain.com/administrator).
  2. Mouse over Extensions in the main horizontal menu, then click on Plugin Manager.

    Joomla Plugin Manager

  3. Locate plugin named System – Legacy, and then click on the check box in front of it.
  4. Click on Enable button.

    Enable Joomla 1.5 Legacy Mode

  5. Ensure that Legacy: 1.0 status appears on the top right corner, and the Enabled column for “System – Legacy” is ticked. The Legacy Mode has been enabled.

    Joomla! 1.5 Legacy Mode 1.0 Compatibility Mode

With Legacy Mode, users can now use extensions, modules, plugins and templates from Joomla! 1.0.x series in Joomla! 1.5 and ensure that the modules are working properly. Joomla! 1.5 now is compatible with Joomla! 1.0.

Note that if you don’t install and populate Joomla! with sample data when installing Joomla!, the default modules and plugins are not loaded into the Site Administrator Panel. If you cannot find the Legacy Module plugin, try to build the sample data again.


This entry was posted on Thursday, November 29th, 2007 at 3:23 am and is filed under Webmaster Resources. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

80 Responses to “How to Enable Legacy Mode in Joomla! 1.5”

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  1. Bas
    November 7th, 2009 00:25
    80

    If you can’t access the backend administration anymore because legacy is turned off, you can edit it in the database.
    Go to _plugings, scroll to System – Legacy, and change the value of ”published” to 1.
    Then it should work again.

  2. Tooshy
    November 6th, 2009 18:49
    79

    Thank you, you resolved for me an error that really bugged me for days and I managed to knew that it was because of templated but didn’t know what to do until I read your article.Really thanks alot again

  3. Jason Hotham
    November 2nd, 2009 08:31
    78

    Hi I’ve just come across this while doing my rounds search for a solution to this problem. Working on clients site, I found on my local machine switch on and off the legacy mode is a breeze. Especially when you need to be in legacy mode just to install certain plugins. When i went online i found the plugin line for the legacy plugin was greyed out. It was so odd. What a waste of time I had trying to resolve the issue, because I tried another browser which I had to login to of course, there it was! It was ok, so i could enable the legacy mode! Then I realised it was greyed out again, but in the same browser this time, which was after I had installed the plugin that i needed to be in legacy mode for. So then I logged out and back in again and it was fine again. So then I could disable legacy mode again. How flipping wierd is that!

  4. Mohammad Arif Hossen
    October 5th, 2009 14:46
    77

    Thanks for your graphical tutorial.

  5. Les
    September 12th, 2009 17:02
    76

    thanks a million – great advice!

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