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PHP can be used to access COM and DCOM objects on Win32 platforms.
If this is a simple DLL there is no way yet to run it from PHP. If the DLL contains a COM server you may be able to access it if it implements the IDispatch interface.
There are dozens of VARIANT types and combinations of them. Most of them are already supported but a few still have to be implemented. Arrays are not completely supported. Only single dimensional indexed only arrays can be passed between PHP and COM. If you find other types that aren't supported, please report them as a bug (if not already reported) and provide as much information as available.
Generally it is, but as PHP is mostly used as a web scripting language it runs in the web servers context, thus visual objects will never appear on the servers desktop. If you use PHP for application scripting e.g. in conjunction with PHP-GTK there is no limitation in accessing and manipulating visual objects through COM.
No, you can't. COM instances are treated as resources and therefore they are only available in a single script's context.
In PHP 5, the COM extension throws com_exception exceptions, which you can catch and then inspect the code member to determine what to do next.
In PHP 4 it's not possible to trap COM errors beside the ways provided by PHP itself (@, track_errors, ..).
No, unfortunately there is no such tool available for PHP.
This error can have multiple reasons:
Exactly like you run local objects. You only have to pass the IP of the remote machine as second parameter to the COM constructor.
Make sure that you have set com.allow_dcom=TRUE in your php.ini.
Edit your php.ini and set com.allow_dcom=TRUE.
This has nothing to do with PHP. ActiveX objects are loaded on client side if they are requested by the HTML document. There is no relation to the PHP script and therefore there is no direct server side interaction possible.
This is possible with the help of monikers. If you want to get multiple references to the same word instance you can create that instance like shown:
<?php
$word = new COM("C:\docs\word.doc");
?>
This will create a new instance if there is no running instance available or it will return a handle to the running instance, if available.
You can define an event sink and bind it using com_event_sink(). You can use com_print_typeinfo() to have PHP generate a skeleton for the event sink class.
The answer is as simple as unsatisfying. I don't know exactly but i think you can do nothing. If someone has specific information about this, please let » me know :)
COM+ extends COM by a framework for managing components through MTS and MSMQ but there is nothing special that PHP has to support to use such components.
PHP itself doesn't handle transactions yet. Thus if an error occurs no rollback is initiated. If you use components that support transactions you will have to implement the transaction management yourself.
In reference to question 1:
On one project I had a dll that exposed certain functions I wished to call from within PHP. I created a PHP Module which had a matching function for each in the DLL. The PHP Module did no processing, merely served as an adapter for the original DLL.
in response to item #1 above: "If this is a simple DLL there is no way yet to run it from PHP."
Answer: There are several different packages/add-ons to php that enable low level access to the windows api. One of the most popular of these packages is available at http://www.winbinder.org
Winbinder does have the ability to load a dll and call it's functions. Winbinder also provides a large set of windows apis for creating windows and controls. This is useful for creating stand-alone desktop apps. It is a possible alternative to php-gtk.
I've had mixed results with Winbinder, some things work very well, others are buggy; source code is available. It's worth a look, Evaluate carefully.
Re: The Windows English CHM Sample with MS Word Automation.
I see that $Word->Release() is called after $Word->Quit().
This seems to be erroneous. Actually, $Word->Release() should not have to be called if proper COM garbage collection is taking place. Release() is a C++ construction not used in either Visual Basic or VBScript or even MS-JScript. Just to be sure, however, I ran the sample through php.exe (5.04 CLI on Windows XP SP1 with Office 2003) and got a RPC failed error on the line containing $Word->Release(). The rest of the sample works fine, and the results are as expected. So, I propose 2 scenarios:
1.There is a problem with the documentation (more likely).
2.There is a problem with PHP504 itself, as this problem is reproduced with any COM Automation call, not just Word.
Be careful with function com_event_sink(), it doesn't totally work : when catching events, all parameters given to your callback function have the same value as the last one => see bug http://bugs.php.net/bug.php?id=31040
It may be obvious to everyone else but...
If you want to write your own COM DLL in MSVC++6 and you want to pass it a string, you need the following in your .idl file:
HRESULT function_name([in] BSTR parameter_name,
[retval, out] BSTR * retval);
retval is the result of your function as a string to be passed back.
BSTR is an unsigned short *, so if you want to use your string with STL string etc. you may need to convert parameters to and from char *.
The burden of my message is that from PHP
$comThing = new COM("comThing.comThing");
print $comThing->function_name("Jeremy");
Jeremy will be marshalled as wide chars, which match BSTR.
ONE SAMPLE USING MS-XML3 PARSER ON WINDOWS
<?
$xml= new COM("Microsoft.XMLDOM");
$xml->async=false;
$xml->load("STYLE.xml");
$xsl = new COM("Microsoft.XMLDOM");
$xsl->async=false;
$xsl->load("STYLE.xsl");
$response=$xml->transformNode($xsl);
print $response;
?>
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