[PHP] COM Dlls not unbinding

[Alex Turner]

Hi All,

I am doing a lot of PHP work with COM.  The system uses php 4.3.3.3 and php is 
being driven via FCGI from our own web server (TAG).

We create an instance of an in-process COM server using the following technique:

 function GetFactory()
 {
  static $obj;
  static $objSet = 0;
  if($objSet==0)
  {
   $obj=new COM("TPN_Obj.JDCom_Factory");
   $objSet=-1;
  }
  return $obj;
 }

The returned COM object is then used as a factory to all our other COM objects.

The snag is that the binding to the COM dll is not being released at the end of 
script execution.  This is visible using ProcessExplorer from SysInternals.

If I call com_release the returned ref-count is zero.  To ensure that php's 
garbage collector was not the culprit, I tried repeatedly calling com_release 
at the end of the script - no change.

The upshot of this issue is that each PHP process in the FCGI process pool 
gradually gets bigger as more and more dlls are bound :-(

Any ideas are welcome; I have gone through the php source but cannot quite 
figure the problem. Changing the C code is OK for our application.

Thanks!

 
Dr Alexander J Turner
Project Network
+44 (0) 7917 065072
Con Call: 0870 241 3425/3342654#