(PHP 4 >= 4.2.0, PHP 5)
com_event_sink — Connect events from a COM object to a PHP object
Instructs COM to sink events generated by comobject into the PHP object sinkobject .
Be careful how you use this feature; if you are doing something similar to the example below, then it doesn't really make sense to run it in a web server context.
sinkobject should be an instance of a class with methods named after those of the desired dispinterface; you may use com_print_typeinfo() to help generate a template class for this purpose.
PHP will attempt to use the default dispinterface type specified by the typelibrary associated with comobject , but you may override this choice by setting sinkinterface to the name of the dispinterface that you want to use.
Returns TRUE on success or FALSE on failure.
Example #1 COM event sink example
<?php
class IEEventSinker {
    var $terminated = false;
   function ProgressChange($progress, $progressmax) {
      echo "Download progress: $progress / $progressmax\n";
    }
    function DocumentComplete(&$dom, $url) {
      echo "Document $url complete\n";
    }
    function OnQuit() {
      echo "Quit!\n";
      $this->terminated = true;
    }
}
$ie = new COM("InternetExplorer.Application");
// note that you don't need the & for PHP 5!
$sink = new IEEventSinker();
com_event_sink($ie, $sink, "DWebBrowserEvents2");
$ie->Visible = true;
$ie->Navigate("http://www.example.org");
while(!$sink->terminated) {
  com_message_pump(4000);
}
$ie = null;
?>