This Hello World example show an admin plugin. In particular it shows a bare bones form with hidden controls to generate values to return to the plugin and all displayed text is retrieved from the localized language file.

Three files are needed

• plugin.info.txt, contain metadata about the plugin, see plugin info for more details.
• admin.php, the actual plugin code called when entering from the admin window.
• lang/en/lang.php, an English language file with localized strings used for this plugin.

lib/plugins/skeleton/plugin.info.txt

plugin.info.txt

base   skeleton
author me
email  me@somesite.com',
date   20yy-mm-dd',
name   Hello World plugin
desc   Demonstration plugin
url    http://www.dokuwiki.org/plugin:skeleton',

lib/plugins/skeleton/admin.php

admin.php

<?php
/**
 * Plugin Skeleton: Displays "Hello World!"
 * 
 * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
 * @author     Christopher Smith <chris@jalakai.co.uk>
 */
 
 
/**
 * All DokuWiki plugins to extend the admin function
 * need to inherit from this class
 */
class admin_plugin_skeleton extends DokuWiki_Admin_Plugin {
 
    var $output = 'world';
 
    /**
     * handle user request
     */
    function handle() {
 
      if (!isset($_REQUEST['cmd'])) return;   // first time - nothing to do
 
      $this->output = 'invalid';
 
      if (!is_array($_REQUEST['cmd'])) return;
 
      // verify valid values
      switch (key($_REQUEST['cmd'])) {
        case 'hello' : $this->output = 'again'; break;
        case 'goodbye' : $this->output = 'goodbye'; break;
      }      
    }
 
    /**
     * output appropriate html
     */
    function html() {
      ptln('<p>'.htmlspecialchars($this->getLang($this->output)).'</p>');
 
      ptln('<form action="'.wl($ID).'" method="post">');
 
      // output hidden values to ensure dokuwiki will return back to this plugin
      ptln('  <input type="hidden" name="do"   value="admin" />');
      ptln('  <input type="hidden" name="page" value="'.$this->getPluginName().'" />');
      formsecuritytoken();
 
      ptln('  <input type="submit" name="cmd[hello]"  value="'.$this->getLang('btn_hello').'" />');
      ptln('  <input type="submit" name="cmd[goodbye]"  value="'.$this->getLang('btn_goodbye').'" />');
      ptln('</form>');
    }
 
}

lib/plugins/skeleton/lang/en/lang.php

lang.php

<?php
/**
 * English language file
 *
 * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
 * @author     Christopher Smith <chris@jalakai.co.uk>
 */
 
// for admin plugins, the menu prompt to be displayed in the admin menu
// if set here, the plugin doesn't need to override the getMenuText() method
$lang['menu'] = 'Admin Skeleton...'; 
 
$lang['btn_hello'] = 'hello';
$lang['btn_goodbye'] = 'goodbye';
 
$lang['world'] = 'Hello, world!';
$lang['again'] = 'Hello again!';
$lang['goodbye'] = 'Goodbye.';
$lang['invalid'] = 'invalid input detected!';