create prolog file from php

A prolog source code file contains plain text. The entire file content is a string. The file_put_contents function offers the simplest approach to writing a string to the file system:

file_put_contents ( $name_of_output_file, $string_content_of_prolog_source_code );

(PHP) file_put_contents: http://www.php.net/manual/en/function.file-put-contents.php[^]