Module Event

To register an event for a module, use the following:

include_once('vtlib/Vtiger/Event.php');
Vtiger_Event::register('<MODULENAME>', '<EVENTNAME>', '<HANDLERCLASS>', '<HANDLERFILE>');

<MODULENAME>	Module for which events should be registered
<EVENTNAME>	vtiger.entity.aftersave, vtiger.entity.beforesave
<HANDLERCLASS>	Event handler class, look at the example below
<HANDLERFILE>	File where HANDLERCLASS is defined (should be within vtiger CRM directory)

Example

Registering event callback before and after save.

if(Vtiger_Event::hasSupport()) {
      Vtiger_Event::register(
            'Payslip', 'vtiger.entity.aftersave',
            'PayslipHandler', 'modules/Payslip/PayslipHandler.php'
      );
      Vtiger_Event::register(
            'Payslip', 'vtiger.entity.beforesave',
            'PayslipHandler', 'modules/Payslip/PayslipHandler.php'
          );
}

modules/Payslip/PayslipHandler.php

<?php
class PayslipHandler extends VTEventHandler {
      function handleEvent($eventName, $data) {
            if($eventName == 'vtiger.entity.beforesave') {
                 // Entity is about to be saved, take required action
                        }
            if($eventName == 'vtiger.entity.aftersave') {
                 // Entity has been saved, take next action
                        }
          }
}
?>