David.. I think I accidentally deleted your last message, but I believe you 
said something about Acrobat not closing after it gets done printing.  Here are 
a few thoughts:

1. If you right click on something and select "print" and it performs the 
command line action listed in the registry as mentioned below, it SHOULD exit 
when done printing. If it doesn't, it could be an app issue.

2. If you use COM and app doesn't close properly, you might want to look at the 
app "Close" as well as "Quit" methods.  If I recall, you can do one, or the 
other, but an instance of the app may still hover invisible in the background.  
I remember using both (in a certain order.. reversing the order made it so the 
app still stayed loaded.. the correct order though made sure the app closed 
properly).

3. If a certain file type (like say Excel files for instance) requires a 
specific app to interpret it's data for output, then you kind of can't get 
around loading the app in order to print it.  Unless you can find a smaller 
view/print-only app that's made for handling that app's data files.   In the 
case of PDF, if you're lucky then your printer knows how to decode them and you 
might get away with piping the raw binary file directly to the print device 
(LPTx in the case of DOS/Windows.. where "x" is of course the number of the 
printer device.  Might have to mount the printer to that port though or do the 
DOS printer config in Windows).   The printer needs intelligible data from the 
PC if it doesn't natively know how to handle the file.  So again, you need the 
real app or a reader type app to load in order to send the printer proper data.


If you get the print command line out of the registry as listed below, then it 
SHOULD exit properly.  If not, it's a problem with the app and not with your 
code.  Try performing the CLI command in a command prompt and see if the app 
exits properly before doing it in PHP.    Something as common (and an open 
standard) like PDF, you should be able to find other DOS and/or Windows apps 
that'll print it, but you'll probably still have to use the command line and 
exec() call of some kind, unless you use COM which is overly complicated and 
burdensome in my opinion.

-TG

= = = Original message = = =

Two (and a half) things:

1. Even though DOS/Windows machines don't have, specifically, /dev/printer or 
/dev/lpr or whatever the *nix specific is, it does have a LPTx: device

According to the page listed below, it may be possible to do:
copy /b filename LPTx

The /b indicates it's a binary file.  How it'd handle PDF fonts and such, I'm 
not sure, but I know that some printers can decode PDF's internally so that'd 
work out great.

2. Second point... If all you need is a simple print function and you have 
exec() privs, why not try to find a DOS based printing solution.  The copy 
command above was mentioned on this page:
http://www.lerup.com/printfile/

It says it works with Windows 3.1 to XP.  And it even works with command line 
options:

"PrintFile also works well with command line (DOS) programs. It has several 
command line options and can read data from command line standard input, e.g. a 
command line pipe. A command like:
dir | prfile32"

So I guess it sets up it's own print device that you can pipe to.

And finally... the half a point.  All of this may not be necessary because you 
can configure Windows printers to support DOS (although I havn't done this in 
ages, I assume you still can in XP) so in theory the normal DOS "print" command 
would pipe through Windows drivers and print handling to the printer of choice.


So in general, there's probably zero need to use COM to print.  One of these 
options should pipe the file through Windows which in turn, could possibly send 
it through the proper printing method.   If not, you might be able to look in 
your registry and find the right-click "Print..." option and see if it's 
something you can execute from command line.

Ok, I know this email's too long already, but I know someone's going to say 
"How do you do that?"  So here's the 50 cent tour:

1. Pull up "regedit"
2. Search for the file extension ".pdf"
3. Make note of the "(Default)" value, in this case "AcroExch.Document" (I 
think this is specific to having the full Acrobat installed)
3. Below the area where all the file extensions are in HKEY_CLASSES_ROOT there 
are the actual named app section (that way, ".gif" and ".jpg" can both point to 
Photoshop.document" or something.. get it?)  So search for "AcroExch.Document" 
in this case
4. Expand that tree and look for "shell". These are all the things that show up 
on your right-click menu.  In this case, we have a "print" section. Under each 
of these entries, there should be (but sometimes not) a "command" branch.  This 
is what's run when you select that option from the right-click menu.  And 
voila! We find that the command to use Acrobat to print (which can be executed 
from command line on a Windows machine) is:
"C:\Program Files\Adobe\Acrobat 5.0\Acrobat\Acrobat.exe" /p /h "%1"

Substituting the %1 for the filename.


Using that command line in a php exec() call should exactly simulate selecting 
right-click PRINT on a PDF file.


Crossposting this to PHP-Win for their benefit too since this is more Windows 
related than PHP General.

I see lots of ways to potentially solve this problem without using COM.

I loved messing with COM (with or without PHP) for a while, but it's not a 
great general solution to things unless you absolutely HAVE to control the app 
(which is very cool and slick sometimes, but not for something as simple as 
printing).

Hope this gives you some new avenues to persue.  Best of luck!

-TG

= = = Original message = = =

Richard Lynch wrote:

>On Mon, October 24, 2005 1:48 pm, Dave Lists wrote:
>  
>
>>I'm generating PDFs under windows using PDFlib and all is easy. What I
>>am wondering though, and google reveals nothing usefull, can I print
>>the
>>PDF to a network printer from windows? I'm presuming to print the file
>>I
>>would ahve to use COM and open it under Acrobat? Anyone done this
>>before
>>and have any pointers? I'm printing out invoices and what to automate
>>the task.
>>    
>>
>
>If, for some weird reason, you want to allow the user (authenticated,
>logged in, trusted) to print to a networked computer on the WEB
>SERVER, then your best bet is probably to figure out how to print that
>PDF from MS-DOS and then to use http://php.net/exec to print it, I
>would guess...
>  
>
 It's from a cli PHP install on a local machine :-)

>You might be able to use PHP to open up a COM object to convince
>Adobe/Windows/whatever to print...
>  
>
 COM makes me want to cry ;-) At the moment I'm trying to convince 
OpenOffiice it wants to play with PHP and COM.
 I have tried to exec print on the windows box but that just hung.

>If it was a Un*x server, you'd just send the document to lpr or CUPS
>or something, and be done with it, probably in a half-hour of work,
>even allowing for a protracted battle with file/exec permissions.
>
>  
>
I'm not sure I could just fire a PDF at lpr, but no doubt it would be 
much easier under Unix :-)

Dave.



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