use C constant in php

[wong_powah@yahoo.ca]

I define some constants in C header file.
e.g.
const int MAX = 10;

How do I use the same value of MAX in php without redefining MAX in
php?
i.e. it involve how php interact with functions and libraries written
in other languages, such as C.

[NC]

Re: use C constant in php

wong_powah@yaho o.ca wrote:[color=blue]
>
> I define some constants in C header file.
> e.g.
> const int MAX = 10;
>
> How do I use the same value of MAX in php without redefining
> MAX in php?
> i.e. it involve how php interact with functions and libraries written
> in other languages, such as C.[/color]

Generally speaking, PHP cannot interact with random code. If you want
PHP to use entities defined in C, you must write a PHP extension and
ensure PHP is configured to use that extension.

Alternatively, you could just have your C program set some environment
variables; they will be accessible to PHP as members of the $_ENV
superglobal array.

Other alternatives include using shared memory (only on Unix) and
wrapping your C program into a Web service...

Cheers,
NC

[Toby Inkster]

Re: use C constant in php

NC wrote:
[color=blue]
> Alternatively, you could just have your C program set some environment
> variables; they will be accessible to PHP as members of the $_ENV
> superglobal array.
>
> Other alternatives include using shared memory (only on Unix) and
> wrapping your C program into a Web service...[/color]

Or the OP could try writing some PHP to parse the C code (or the
particular bits of C code that are required)

--
Toby A Inkster BSc (Hons) ARCS
Contact Me ~ http://tobyinkster.co.uk/contact

[Mike Youell]

Re: use C constant in php

A constants.ini (or whatever) file which is read by C and PHP could be
used too I guess.

[Mladen Gogala]

Re: use C constant in php

On Fri, 07 Apr 2006 07:02:53 -0700, wong_powah wrote:
[color=blue]
> I define some constants in C header file.
> e.g.
> const int MAX = 10;
>
> How do I use the same value of MAX in php without redefining MAX in
> php?
> i.e. it involve how php interact with functions and libraries written
> in other languages, such as C.[/color]

The statement

define('MAX',10 );

would do the same thing. The "int" part is impossible, due to the weakly
typed nature of PHP. As for interacting with other languages, read the
manuals, they describe how to write an extension.

--

http://www.mgogala.com