processmaker-files/workflow/engine/plugins/charts.php

<?php
  
 class chartsPlugin extends PMPlugin 
 {
    function chartsPlugin($sNamespace, $sFilename = null) 
    {
        $res = parent::PMPlugin($sNamespace, $sFilename);
        $this->sFriendlyName = 'Charts Plugin';
        $this->sDescription  = 'This plugin shows generic charts for ProcessMaker';
        $this->sPluginFolder = 'charts';
        $this->sSetupPage    = 'setupPage';
        $this->aWorkspaces = array (  );
        $this->iVersion = 0.45;
        $this->bPrivate = true;
        return $res;
    }

    function setup()
    {
      $this->registerTrigger( 10000, 'createCaseFolder' );
    }

    function install()
    {
      
    }
  }

 $oPluginRegistry =& PMPluginRegistry::getSingleton();
 $oPluginRegistry->registerPlugin('charts', __FILE__);