[dokuwiki] Re: javascript with php global variables

  • From: Michiel Kamermans <pomax@xxxxxxxxxxxxxxxxxxxx>
  • To: dokuwiki@xxxxxxxxxxxxx
  • Date: Tue, 17 Nov 2009 22:44:34 -0800

How do I get my ajax javascript to use the php global variables? Eg. I want my plugin javascript to read the $INFO, $AUTH etc of the page everytime when I click a button.
The real question is "why?". If there are values in these session variables that you want, then perhaps you want to explicitly extract these in your plugin and then pass them to your javascript, for instance via dokuwiki's addInitEvent() javascript function:

if(!defined('DOKU_INC')) die();
if(!defined('DOKU_PLUGIN')) define('DOKU_PLUGIN',DOKU_INC.'lib/plugins/');

class action_plugin_yourplugin extends DokuWiki_Action_Plugin {

   function register(&$controller)
       // hook into XHTML
$controller->register_hook('RENDERER_CONTENT_POSTPROCESS', 'AFTER', $this, '_varpass');
function _varpass(&$event, $param)
       // make sure this is the xhtml output
       $data = &$event->data[1];
       $datatype = &$event->data[0];
       if ($datatype != 'xhtml')  { return; }
       // grab relevant vars
       $statevar = $INFO['...'];
// add a javascript event to dokuwiki's event list (handled before a DOM exists) $data[] = "addInitEvent(function(){ var statevar = $statevar; ...;});";

But the real question is of course still "why do you need session variables passed to javascript". The session variables exist on the server, for the purpose of session administration and content generation, and javascript should be agnostic towards what these session variables say - instead, you should generate your page in such a way that the right javascript is loaded because your plugin generates different content based on the content of the different session variables.

- Mike "Pomax" Kamermans
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