<?php
/*
   Required Pixelpost version 1.5 Beta
   Pixelpost www: http://www.pixelpost.org/

   captcha addon
   beta 0.3

   based on addon of Connie Mueller-Goedecke updated for pp1.5++ by sentinel
   Contact: blog | at|klammeraffe | digitalview.at

   License: http://www.gnu.org/copyleft/gpl.html

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License
   as published by the Free Software Foundation; either version 2
   of the License, or (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

 */
// anti comment spams
/* you may put comment marks before the error_log lines.. which are
 * there for debugging purposes
 */
function audit() {
        session_start();

        $digit = $_SESSION['digit'];
       	error_log("CAPTCHA: ". getenv ("REMOTE_ADDR") ." session value \"" . $_SESSION['digit'] . "\"" ,0);
        $userinput = $_POST['userinput'];
        error_log("CAPTCHA: ". getenv ("REMOTE_ADDR") ." send value \"" . $_POST['userinput'] . "\"" , 0 );
        //session_destroy();

        if(!isset($_SESSION['digit']) || !is_numeric($_SESSION['digit']) || !is_numeric($userinput)) {
        		error_log("CAPTCHA: ". getenv ("REMOTE_ADDR") ." has not send any session digits or non-numeric value". "-".isset($_SESSION['digit'])."-".is_numeric($_SESSION['digit'])."-".is_numeric($userinput)."-", 0 );
				$_SESSION['digit'] = NULL;
        		unset($_SESSION['digit']);
                return false;
        }
        else if (($digit == $userinput) && ($digit > 1) ) {
        		error_log("CAPTCHA: ". getenv ("REMOTE_ADDR") ." sent correct digit" , 0 );
				$_SESSION['digit'] = NULL;
        		unset($_SESSION['digit']);
                return true;
        } 
		else {
        		error_log("CAPTCHA: ". getenv ("REMOTE_ADDR") ." sent wrong digit " . is_numeric($_SESSION['digit']), 0 );
				$_SESSION['digit'] = NULL;
        		unset($_SESSION['digit']);
                return false;
        }

}

?>