root/releases/0.1.2a/units/friends/user_info_menu.php

<?php

    // If we've been passed a valid user ID as a parameter ...
        if (isset($parameter) && (isset($parameter[0])) && ($parameter[0] != $_SESSION['userid']) && logged_on) {
            
            $user_id = (int) $parameter[0];
            $result = db_query("select count(ident) as friend from friends 
                                where owner = " . $_SESSION['userid'] . "
                                  and friend = $user_id");
            $result = (int) $result[0]->friend;
            if ($result == 0) {
                $run_result = "
                    <form action=\"/".$_SESSION['username']."/friends/\" method=\"post\" style=\"display: inline\">
                        <input type=\"hidden\" name=\"action\" value=\"friend\" />
                        <input type=\"hidden\" name=\"friend_id\" value=\"$user_id\" />
                        <input type=\"image\" src=\"/_friends/gfx/friend.gif\" border=\"0\" width=\"17\" height=\"18\" alt=\"Friend\" title=\"Friend\" onClick=\"return confirm('Are you sure you want to add this user to your friends list?')\" />
                    </form>";
            } else {
                $run_result = "
                    <form action=\"/".$_SESSION['username']."/friends/\" method=\"post\" style=\"display: inline\">
                        <input type=\"hidden\" name=\"action\" value=\"unfriend\" />
                        <input type=\"hidden\" name=\"friend_id\" value=\"$user_id\" />
                        <input type=\"image\" src=\"/_friends/gfx/unfriend.gif\" border=\"0\" width=\"17\" height=\"18\" alt=\"Un-Friend\" title=\"Un-Friend\" onClick=\"return confirm('Are you sure you want to remove this user from your friends list?')\"/>
                    </form>";
            }
            
        }

?>