Do you want it all in seperate txt files, or just in one? Here is a simple script for all in one file:
Put this in your site where you want the form to be.
This form sends the information to post.php, create this one now:
$seperate =" || ";
$data = "information.txt";
$file = fopen($data, "a+");
fputs($file, "");
fclose($file);
echo ("Your information has been sent");
?>
Now just make an empty file called information.txt, put this all in the same directory and it should work.
Hope it'll help ya,
Peace, St3v3