PHP Component Object Model “Access is denied”

My development environment is PHP 5.3, IIS 7.5, and Window7 Home. I am developing a prototype application, which requires the PHP function imagewindowgrab(). This function requires calling the Windows Component Object Model (COM).

My single line of code was this:


$browser = new COM("InternetExplorer.Application") or die("Unable to instantiate IE");

It produced the following error:


Fatal error: Uncaught exception 'com_exception' with message 
'Failed to create COM object `InternetExplorer.Application': Access is denied. ' 
in C:\inetpub\wwwroot\trial.php:8 Stack trace: #0 C:\inetpub\wwwroot\trial.php(8): com->com('InternetExplore...') #1 {main} thrown 
in C:\inetpub\wwwroot\trial.php on line 8

After searching for hours, trolling through .NET forums, and finding good resources:

http://forums.asp.net/t/1680634.aspx/1
http://learn.iis.net/page.aspx/624/application-pool-identities/

What finally worked for me was following the instructions outlined in the answer to this SO question:
Accessing Office Word object model through asp.net results in "failed due to the following error: 80070005 Access is denied."

AND following up those instructions with the following:

On the command line enter DCOMCNFG
Click right on Console Root > Component Service > Computers > My Computer and select Properties
On the tab COM Security > Access Permissions click on Edit Default and add the user (e.g. IIS_IUSRS) or service
Check allow local access

This appears to have taken care of my Access Permission problems with the COM framework from PHP.

This question appears unanswered but answer have self explained in question . I am just putting here :-

Tried Code :-

$browser = new COM("InternetExplorer.Application") or die("Unable to instantiate IE");

Error Generated :-

Fatal error: Uncaught exception 'com_exception' with message 
'Failed to create COM object `InternetExplorer.Application': Access is denied. ' 
in C:\inetpub\wwwroot\trial.php:8 Stack trace: #0 C:\inetpub\wwwroot\trial.php(8): com->com('InternetExplore...') #1 {main} thrown 
in C:\inetpub\wwwroot\trial.php on line 8

Steps and resources that helped to solved :-

Good Resources:-

http://forums.asp.net/t/1680634.aspx/1

http://learn.iis.net/page.aspx/624/application-pool-identities/

Resources that actually help to solve :-

Accessing Office Word object model through asp.net results in "failed due to the following error: 80070005 Access is denied."

Steps :-

In the line of command put DCOMCNFG
Click Right on Console Root > Component Service > Computers > My Computer, And Select Properties
In the Tab COM Security > Access Permissions Click in Edit Default Add the User (Ex. IIS_IUSRS) or service
Check Allow Local Access

Note : Take care of Access Permission problems with the COM framework from PHP.