subscribe.php at NmnNewsletter

<?php
	/*
    NmnNewsletter is a library that provides newsletter service 
	management for websites running php and mysql.
    Copyright (C) 2006  Ivan Preziosi from netmeans.net - Rome.

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

    For more informations or to join the development of the library contact
    the author at: hide@address.com
    */
	session_start();
	require_once("includes/config.php");
	
	if($_REQUEST["action"] == "subscribe")
	{	
		$subscribers = NewsletterUsers::getUserArray(false,false);
		foreach($subscribers as $subscriber)
		{
			if($subscriber == $_REQUEST["email"])
			{
				$result = 1;
				break;
			}
			else
			{
				$result = 0;
			}
		}

		if($result == 1)
		{
			$message = SUBSCRIBE_FEEDBACK_EXISTENT;
		}
		else
		{
			if (NewsletterUsers::subscribeUser($_REQUEST["email"],false)){
				$message = SUBSCRIBE_FEEDBACK_OK;
			}else{
				$message = SUBSCRIBE_FEEDBACK_KO;
			}
		}
	}

		?>
		<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>NmnNewsletter</title>
<?php echo "<meta http-equiv=\"content-type\" content=\"text/html\"; charset=\"".CHARSET."\">"; ?>
<link href="../../pages/zk.css" rel="stylesheet" type="text/css" />
</head>
<body style="background:#ffffff;">
	<span style="color:#000000"><?php echo $message; ?></span><br />
	<a href='javascript:history.back(-1)'><?php echo SUBSCRIBE_FEEDBACK_BACK_LINK; ?></a>
</body>
</html>