PHP + Cookies

Anon

Ok, I'm trying to install a small form that asks for a username. The form was installed and the textbox was named UN. The php script I wrote is as follows, I'm a beginner so it is probably a joke:

<?php
if ($UN != "" || "Guest"):
setcookie ("UserName", $UN, time() + 3600);

$referer = getenv ("HTTP_REFERER");

echo "<meta http-equiv=\"refresh\" content=\"1;url=$referer\" />\n\n\n\n\n\n This is in testing phase right now...\n\n";
echo $UserName;
echo $HTTP_COOKIE_VARS["UserName"];
echo "Cookie Set";
else:
setcookie ("UserName", Guest, time() + 3600);

endif;
?>

If the above code did not show up, you can see it at http://www.mechanicmatt.com/Cookie.txt . The problem is that the script does not return any errors ( it can be run at http://www.mechanicmatt.com/cgi-bin/LogIn.php4 ). It just does not set a cookie. I run IE6 and I do have cookies turned on, I even added my site as a "trusted site" and no cookies are set. When the echo commands execute to show the cookie contents, nothing is shown, just blank. What is going wrong? Thanks

Anon

Being a rookie cookie handler, I can only guess your problem is you are not telling the cookie which domain it is operating in, try the line:
setcookie ("UserName", $UN, time()+3600, "/cgi-bin/", "www.mechanicmatt.com", 0);

/cgi-bin/ being the folder the cookie is ONLY allowed to perate in, so if it cannot be called into the root of the site of any other folder (but should still work in sub-folders of cgi-bin).
0 at the end being if it is allowed to operate over normal 'http' servers (1 if it can only work over 'https' servers).

BTW, can anyone help me with a cookie problem? I need to extend the life of my cookies past 1 hour, so can shoe me an example of using some method (whether it's PHP/CGI/HTML or whatever to make my cookies last longer before they 'go off'?)