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Answer 1

A:

This article about wrapping C++ classes in a PHP extension may help.

EDIT: all the solutions in other answers are far simpler, but less flexible. It all depends on what you need.

Jacob B 2009-06-09 15:26:00

I would say if anything a socket connection is more flexible, you can send binary data anywhere to do anything :) Your solution may be better in another sense in that it integrates php and c++ code which may or may not be more what the OP is asking.

Doug T. 2009-06-09 15:43:06

On the other hand, you still need to serialize/deserialize any data you want to send, which IMO qualifies as less flexible. The advantage of using a language's extension interface is that you get to handle the language's data structures directly--for sockets you "only" get strings of bytes.

Jacob B 2009-06-09 16:20:24

Out of these three methods which in your opinios would be the quickest. To me it appears that the backticks method has to start and execute the C++ script whereas the sockets and (I think) wrapper methods rely on C++ programs that are memory resident and so can respond quicker. Does that seem reasonable or have I got it wrong?

Columbo 2009-06-09 16:33:06

Yes, that's correct. Wrapper script is faster than sockets by a little tiny bit--there's some extra overhead due to serialization and memory allocation. Backticks have to not only start the C++ script but also, I believe, invoke the shell.

Jacob B 2009-06-09 17:03:34

Answer 2

+3 A:

You could have your c++ app send its output to stdout, then call it from PHP with backticks, e.g.

$output=`myapp $myinputparams`;

Paul Dixon 2009-06-09 15:27:16

Thank you very much to all answer-ers, I expect I will need to graduate to the more flexible solutions in time but for now this has worked. Thanks.

Columbo 2009-06-09 16:15:46

be sure to give the man a +1 if it helped you then :)

Doug T. 2009-06-09 16:40:53

Answer 3

A:

If you need to communicate to a running C++ program, a socket connection over the localhost might be the simplest, most platform-independent and most widely supported solution for communicating between the two processes. Sockets were traditionally built to communicate over network interfaces, but I have seen them used in many cases as a method of doing a pipe. They are fairly ubiquitous and supported in most modern languages.

Here's a C guide for socket programming. for your C++ program.

Doug T. 2009-06-09 15:29:53

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