Joomla Plugin not running (is installed)

Question

I have "written" a plugin for Joomla! I say "written" because it is actually someone else's, but it was for Joomla 1.5, and I'm trying to upgrade it to run in Joomla 1.7. However, it's installed and it doesn't want to run. I have tried making it generate an error out of nothing, but it wouldn't give me anything. I'm not even sure if it is Joomla 1.7 code or not, but I'm hoping you could help with that too.

<?php

// no direct access
defined( '_VALID_MOS' ) or die( 'Restricted access' );

jimport('joomla.plugin.plugin');

class plgContentRegisteredTags extends JPlugin
{
    function plgContentRegisteredTags (&$subject, $params)
    {
        parent::__construct($subject,$params);
    }

    function onPrepareContent ( $context, &$article, &$params, $page=0 )
    {
        global $mainframe;
        //if ( !$published ) return true;

        // define the regular expression for the bot
        $regex1 = "#{reg}(.*?){/reg}#s";
        $regex2 = "#{noreg}(.*?){/noreg}#s";

        // perform the replacement
        $article->text = preg_replace_callback(
            $regex1,
            create_function(
                '$matches',
                'global $my;
                if($my->id) return $matches[1];
                return "";'
            ),
            $article->text
        );

        $article->text = preg_replace_callback(
            $regex2,
            create_function(
                '$matches',
                'global $my;
                if(!$my->id) return $matches[1];
                return "";'
            ),
            $article->text
        );

        return true;
    }
}

Note: it just doesn't want to run at all (no error, no code execution), even though it is enabled and installed.

Any help would be appreciated.

What is the files name and where is it located (relative to the joomla root) after installation? — Nobody moving away from SE
I did not work with joomla for some time, but I remember that there are naming conventions for the name of the component file. I think it should be componentname.php. So it would be registeredtags.php instead of helloworld.php. — Nobody moving away from SE
Just to be sure: Did you also enable the component? Also I am interested in how you try to access the plugin. — Nobody moving away from SE
Ok then what is the intend of this component? The usual way to access components is to call them directly via my.domain/index.php?option=com_registeredtags. But from your definition it sounds like you want to have a plugin instead of a component? — Nobody moving away from SE
Plugins have another installation manifest (xml) format. You should have a look into the tutorials on creating these files. Another source would be installations of other plugins that you could analyze, as the documentation for new versions is usually rare. — Nobody moving away from SE

Craig Craig · Accepted Answer · 2012-02-08T23:45:37

Plugin-ins in Joomla! are stored in plugins/plugin-type/plugin_name/ relative to the site root. Components are stored in the components/ directory.

eg. the pagebreak content plugin is found at 'plugins/content/pagebreak/' and contains the files:

plugins/content/pagebreak/pagebreak.php
plugins/content/pagebreak/pagebreak.xml
plugins/content/pagebreak/index.html          // not an active file

You can read about creating a content plugin here.

Joomla Plugin not running (is installed)

1 Answers