database - Writing Joomla bridge - User plugin -

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i want write joomla plugin connect user tables in database (one way).

so on new user registration, user duplicated , stored in second table (other script). main goal. things updating on password change/delete etc. can left until later.

any ideas can find information helping me write plugin joomla 1.6? can user registration data etc?

i have written plugin joomla 1.6 takes new registered user's id , puts table. deletes user info secondary table if user account deleted. should going, have @ code below:

this plugin called: plg_foo_user

foouser.php

<?php  defined('_jexec') or die(); jimport('joomla.plugin.plugin');  class plguserfoouser extends jplugin {    function onuseraftersave( $user, $isnew, $success, $msg ) {     //jerror::raisewarning(100, 'here1');     if ($isnew && $success) {       $db = &jfactory::getdbo();       $db->setquery( 'insert #__foo_users (user_id) values ('.$user['id'].')' );       $db->query();     }   }    function onuserafterdelete( $user, $success, $msg ) {     //jerror::raisewarning(100, 'here2');     $db = &jfactory::getdbo();     if ($success) {       $db->setquery( 'delete #__foo_users user_id ='.$user['id'] );       $db->query();       return true;     }   }  }  ?>

foouser.xml

<?xml version="1.0" encoding="utf-8"?> <extension    version="1.6"   type="plugin"   group="user">   <name>foo user</name>   <author>martin rose</author>   <creationdate>january 2011</creationdate>   <copyright>(c) 2011 open source matters. rights reserved.</copyright>   <license>gnu/gpl</license>   <authoremail></authoremail>   <authorurl></authorurl>   <version>1.0</version>   <description>making foo happen</description>    <files>     <filename plugin="foouser">foouser.php</filename>     <filename>index.html</filename>   </files>  </extension>

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