PHP: How To Call Standard Library Functions

Question

Hi,

I'm starting with PHP for dynamic web pages. I have some libaries written in ANSI C for getting/setting parameters and other proprietary stuff. I wonder, is there a simple solution to use a wrapper inside PHP to call this funtions? Is there a already existing class/library? What would be the best practice to do this on my own? I don't want do make calls to external applications and use stdin/stdout!

Is there a simple example available? I don't want to dig through the Zend documentation for now, I only need a feeling for the complexity.

Thanks, kind regards, Andi

Answer 1

Can you package your libraries into a DLL? If so, you can call them through PHP's COM api.

PHP COM Docs: http://us3.php.net/manual/en/book.com.php

Example Code:

<?php  
$com = new COM("DynamicWrapper");
$com->Register("KERNEL32", "Beep", "i=ll", "f=s", "r=l");
$com->Beep(800, 10);

Otherwise you can write a extension that contains a custom wrapper function (ie, execute_through_wrapper('yourfunc')). Here is a doc on writing php functions in C.

http://php.net/manual/en/internals2.funcs.php

Edit:
http://abhinavsingh.com/blog/2008/12/php-extensions-how-and-why/

Here is a quick tutorial on writing extensions in C. It shouldn't be too difficult to write a wrapper function. Once you created the extension, it can be loaded dynamically through dl() (very dangerous, and depreciated).

http://us2.php.net/manual/en/function.dl.php

Those are the only options in your case. There isn't a linux equivalent (.so loader) of the dll loader (its a win32-related api call).

Answer 2

You could also have gearman act as an intermediary.

Gearman provides a generic application framework to farm out work to other machines or processes that are better suited to do the work. It allows you to do work in parallel, to load balance processing, and to call functions between languages. It can be used in a variety of applications, from high-availability web sites to the transport of database replication events. In other words, it is the nervous system for how distributed processing communicates.

Answer 3

At http://pear.php.net/ I found an extension named "inline_c". Unfortunately I is not maintained. But it looks like this would be the kinde of stuff I would prefer.

Answer 4

What'a about SWIG? http://www.swig.org/