How to use Prolog and PHP

[renata12345]

Hi there! I'd like to pose a question.
I'm building a site using PHP and I want to add an expert system i created using SWI-Prolog. The only problem is that i don't know how to do that...
The expert syestem helps users choose a lesson providing them 2-3 choices based on their answers.
What i want is when the user enters a certain page he 'll be able to start using the expert system and answer the system's questions.
Is there a way i can achieve that?

I'd appreciate any help!

Renata

 

[joel76]

You can create HTML pages with SWI-Prolog :

http://www.swi-prolog.org/pldoc/package/http.html

 

[renata12345]

Yeah.. although it's a nice idea that's not exactly what I want. What I need is to create a site using PHP and the expert system embedded itno the PHP page...
Is there a way i can do that?

Renata

 

[joel76]

I found this link :

http://www.j-paine.org/spin_script.html

 

[renata12345]

Thanks Joel76. That's exactly what I want.

 

[renata12345]

Hi there!

I looked at the link you suggested and although it looks fine i have a problem while runnnig it... I have no output at all!!
this is how i modified the code:
<?php $cmd = "nice -n15 plwin.exe -L128k -G128k -T128k -A128k -f test.pl -g test,halt"; //definition of cmd variable.
echo $cmd; //echo works fine.
?>
<P>
<PRE>
<?php
$output = exec( $cmd );
echo $output; //thethere's no output (it shows blank)> echo "\n";
exec( $cmd, $output, $retval ); //executing the exec function.
print_r( $output ); //it prints out Array ()
echo $output ; //it prints out Array>
echo "\n";> echo $retval; //the value returned is 1, which means there's an> error...
?>

I even try using the command prompt to call the desired file using
C:\route\to\the\file\test.pl and although it calls Prolog succesfully I don't know how to cosnult the file i want from the command line.

To sum up, is there something Ican do so I can call Prolog and my pl file successfully from PHP?

Thanks in advance

Renata.