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    Current File : /home/m/e/h/meharicl/www/phpBB3/includes/functions_messenger.php

    <?php
    /**
    *
    * This file is part of the phpBB Forum Software package.
    *
    * @copyright (c) phpBB Limited <https://www.phpbb.com>
    * @license GNU General Public License, version 2 (GPL-2.0)
    *
    * For full copyright and license information, please see
    * the docs/CREDITS.txt file.
    *
    */
    
    /**
    * @ignore
    */
    if (!defined('IN_PHPBB'))
    {
    	exit;
    }
    
    /**
    * Messenger
    */
    class messenger
    {
    	var $msg, $replyto, $from, $subject;
    	var $addresses = array();
    	var $extra_headers = array();
    
    	var $mail_priority = MAIL_NORMAL_PRIORITY;
    	var $use_queue = true;
    
    	/** @var \phpbb\template\template */
    	protected $template;
    
    	/**
    	* Constructor
    	*/
    	function __construct($use_queue = true)
    	{
    		global $config;
    
    		$this->use_queue = (!$config['email_package_size']) ? false : $use_queue;
    		$this->subject = '';
    	}
    
    	/**
    	* Resets all the data (address, template file, etc etc) to default
    	*/
    	function reset()
    	{
    		$this->addresses = $this->extra_headers = array();
    		$this->msg = $this->replyto = $this->from = '';
    		$this->mail_priority = MAIL_NORMAL_PRIORITY;
    	}
    
    	/**
    	* Set addresses for to/im as available
    	*
    	* @param array $user User row
    	*/
    	function set_addresses($user)
    	{
    		if (isset($user['user_email']) && $user['user_email'])
    		{
    			$this->to($user['user_email'], (isset($user['username']) ? $user['username'] : ''));
    		}
    
    		if (isset($user['user_jabber']) && $user['user_jabber'])
    		{
    			$this->im($user['user_jabber'], (isset($user['username']) ? $user['username'] : ''));
    		}
    	}
    
    	/**
    	* Sets an email address to send to
    	*/
    	function to($address, $realname = '')
    	{
    		global $config;
    
    		if (!trim($address))
    		{
    			return;
    		}
    
    		$pos = isset($this->addresses['to']) ? count($this->addresses['to']) : 0;
    
    		$this->addresses['to'][$pos]['email'] = trim($address);
    
    		// If empty sendmail_path on windows, PHP changes the to line
    		if (!$config['smtp_delivery'] && DIRECTORY_SEPARATOR == '\\')
    		{
    			$this->addresses['to'][$pos]['name'] = '';
    		}
    		else
    		{
    			$this->addresses['to'][$pos]['name'] = trim($realname);
    		}
    	}
    
    	/**
    	* Sets an cc address to send to
    	*/
    	function cc($address, $realname = '')
    	{
    		if (!trim($address))
    		{
    			return;
    		}
    
    		$pos = isset($this->addresses['cc']) ? count($this->addresses['cc']) : 0;
    		$this->addresses['cc'][$pos]['email'] = trim($address);
    		$this->addresses['cc'][$pos]['name'] = trim($realname);
    	}
    
    	/**
    	* Sets an bcc address to send to
    	*/
    	function bcc($address, $realname = '')
    	{
    		if (!trim($address))
    		{
    			return;
    		}
    
    		$pos = isset($this->addresses['bcc']) ? count($this->addresses['bcc']) : 0;
    		$this->addresses['bcc'][$pos]['email'] = trim($address);
    		$this->addresses['bcc'][$pos]['name'] = trim($realname);
    	}
    
    	/**
    	* Sets a im contact to send to
    	*/
    	function im($address, $realname = '')
    	{
    		// IM-Addresses could be empty
    		if (!trim($address))
    		{
    			return;
    		}
    
    		$pos = isset($this->addresses['im']) ? count($this->addresses['im']) : 0;
    		$this->addresses['im'][$pos]['uid'] = trim($address);
    		$this->addresses['im'][$pos]['name'] = trim($realname);
    	}
    
    	/**
    	* Set the reply to address
    	*/
    	function replyto($address)
    	{
    		$this->replyto = trim($address);
    	}
    
    	/**
    	* Set the from address
    	*/
    	function from($address)
    	{
    		$this->from = trim($address);
    	}
    
    	/**
    	* set up subject for mail
    	*/
    	function subject($subject = '')
    	{
    		$this->subject = trim($subject);
    	}
    
    	/**
    	* set up extra mail headers
    	*/
    	function headers($headers)
    	{
    		$this->extra_headers[] = trim($headers);
    	}
    
    	/**
    	* Adds X-AntiAbuse headers
    	*
    	* @param \phpbb\config\config	$config		Config object
    	* @param \phpbb\user			$user		User object
    	* @return void
    	*/
    	function anti_abuse_headers($config, $user)
    	{
    		$this->headers('X-AntiAbuse: Board servername - ' . mail_encode($config['server_name']));
    		$this->headers('X-AntiAbuse: User_id - ' . $user->data['user_id']);
    		$this->headers('X-AntiAbuse: Username - ' . mail_encode($user->data['username']));
    		$this->headers('X-AntiAbuse: User IP - ' . $user->ip);
    	}
    
    	/**
    	* Set the email priority
    	*/
    	function set_mail_priority($priority = MAIL_NORMAL_PRIORITY)
    	{
    		$this->mail_priority = $priority;
    	}
    
    	/**
    	* Set email template to use
    	*/
    	function template($template_file, $template_lang = '', $template_path = '', $template_dir_prefix = '')
    	{
    		global $config, $phpbb_root_path, $user;
    
    		$template_dir_prefix = (!$template_dir_prefix || $template_dir_prefix[0] === '/') ? $template_dir_prefix : '/' . $template_dir_prefix;
    
    		$this->setup_template();
    
    		if (!trim($template_file))
    		{
    			trigger_error('No template file for emailing set.', E_USER_ERROR);
    		}
    
    		if (!trim($template_lang))
    		{
    			// fall back to board default language if the user's language is
    			// missing $template_file.  If this does not exist either,
    			// $this->template->set_filenames will do a trigger_error
    			$template_lang = basename($config['default_lang']);
    		}
    
    		$ext_template_paths = array(
    			array(
    				'name' 		=> $template_lang . '_email',
    				'ext_path' 	=> 'language/' . $template_lang . '/email' . $template_dir_prefix,
    			),
    		);
    
    		if ($template_path)
    		{
    			$template_paths = array(
    				$template_path . $template_dir_prefix,
    			);
    		}
    		else
    		{
    			$template_path = (!empty($user->lang_path)) ? $user->lang_path : $phpbb_root_path . 'language/';
    			$template_path .= $template_lang . '/email';
    
    			$template_paths = array(
    				$template_path . $template_dir_prefix,
    			);
    
    			$board_language = basename($config['default_lang']);
    
    			// we can only specify default language fallback when the path is not a custom one for which we
    			// do not know the default language alternative
    			if ($template_lang !== $board_language)
    			{
    				$fallback_template_path = (!empty($user->lang_path)) ? $user->lang_path : $phpbb_root_path . 'language/';
    				$fallback_template_path .= $board_language . '/email';
    
    				$template_paths[] = $fallback_template_path . $template_dir_prefix;
    
    				$ext_template_paths[] = array(
    					'name'		=> $board_language . '_email',
    					'ext_path'	=> 'language/' . $board_language . '/email' . $template_dir_prefix,
    				);
    			}
    			// If everything fails just fall back to en template
    			if ($template_lang !== 'en' && $board_language !== 'en')
    			{
    				$fallback_template_path = (!empty($user->lang_path)) ? $user->lang_path : $phpbb_root_path . 'language/';
    				$fallback_template_path .= 'en/email';
    
    				$template_paths[] = $fallback_template_path . $template_dir_prefix;
    
    				$ext_template_paths[] = array(
    					'name'		=> 'en_email',
    					'ext_path'	=> 'language/en/email' . $template_dir_prefix,
    				);
    			}
    		}
    
    		$this->set_template_paths($ext_template_paths, $template_paths);
    
    		$this->template->set_filenames(array(
    			'body'		=> $template_file . '.txt',
    		));
    
    		return true;
    	}
    
    	/**
    	* assign variables to email template
    	*/
    	function assign_vars($vars)
    	{
    		$this->setup_template();
    
    		$this->template->assign_vars($vars);
    	}
    
    	function assign_block_vars($blockname, $vars)
    	{
    		$this->setup_template();
    
    		$this->template->assign_block_vars($blockname, $vars);
    	}
    
    	/**
    	* Send the mail out to the recipients set previously in var $this->addresses
    	*
    	* @param int	$method	User notification method NOTIFY_EMAIL|NOTIFY_IM|NOTIFY_BOTH
    	* @param bool	$break	Flag indicating if the function only formats the subject
    	*						and the message without sending it
    	*
    	* @return bool
    	*/
    	function send($method = NOTIFY_EMAIL, $break = false)
    	{
    		global $config, $user, $phpbb_dispatcher;
    
    		// We add some standard variables we always use, no need to specify them always
    		$this->assign_vars(array(
    			'U_BOARD'	=> generate_board_url(),
    			'EMAIL_SIG'	=> str_replace('<br />', "\n", "-- \n" . htmlspecialchars_decode($config['board_email_sig'])),
    			'SITENAME'	=> htmlspecialchars_decode($config['sitename']),
    		));
    
    		$subject = $this->subject;
    		$template = $this->template;
    		/**
    		* Event to modify the template before parsing
    		*
    		* @event core.modify_notification_template
    		* @var	int						method		User notification method NOTIFY_EMAIL|NOTIFY_IM|NOTIFY_BOTH
    		* @var	bool					break		Flag indicating if the function only formats the subject
    		*											and the message without sending it
    		* @var	string					subject		The message subject
    		* @var \phpbb\template\template template	The (readonly) template object
    		* @since 3.2.4-RC1
    		*/
    		$vars = array('method', 'break', 'subject', 'template');
    		extract($phpbb_dispatcher->trigger_event('core.modify_notification_template', compact($vars)));
    
    		// Parse message through template
    		$message = trim($this->template->assign_display('body'));
    
    		/**
    		* Event to modify notification message text after parsing
    		*
    		* @event core.modify_notification_message
    		* @var	int		method	User notification method NOTIFY_EMAIL|NOTIFY_IM|NOTIFY_BOTH
    		* @var	bool	break	Flag indicating if the function only formats the subject
    		*						and the message without sending it
    		* @var	string	subject	The message subject
    		* @var	string	message	The message text
    		* @since 3.1.11-RC1
    		*/
    		$vars = array('method', 'break', 'subject', 'message');
    		extract($phpbb_dispatcher->trigger_event('core.modify_notification_message', compact($vars)));
    
    		$this->subject = $subject;
    		$this->msg = $message;
    		unset($subject, $message, $template);
    
    		// Because we use \n for newlines in the body message we need to fix line encoding errors for those admins who uploaded email template files in the wrong encoding
    		$this->msg = str_replace("\r\n", "\n", $this->msg);
    
    		// We now try and pull a subject from the email body ... if it exists,
    		// do this here because the subject may contain a variable
    		$drop_header = '';
    		$match = array();
    		if (preg_match('#^(Subject:(.*?))$#m', $this->msg, $match))
    		{
    			$this->subject = (trim($match[2]) != '') ? trim($match[2]) : (($this->subject != '') ? $this->subject : $user->lang['NO_EMAIL_SUBJECT']);
    			$drop_header .= '[\r\n]*?' . preg_quote($match[1], '#');
    		}
    		else
    		{
    			$this->subject = (($this->subject != '') ? $this->subject : $user->lang['NO_EMAIL_SUBJECT']);
    		}
    
    		if (preg_match('#^(List-Unsubscribe:(.*?))$#m', $this->msg, $match))
    		{
    			$this->extra_headers[] = $match[1];
    			$drop_header .= '[\r\n]*?' . preg_quote($match[1], '#');
    		}
    
    		if ($drop_header)
    		{
    			$this->msg = trim(preg_replace('#' . $drop_header . '#s', '', $this->msg));
    		}
    
    		if ($break)
    		{
    			return true;
    		}
    
    		switch ($method)
    		{
    			case NOTIFY_EMAIL:
    				$result = $this->msg_email();
    			break;
    
    			case NOTIFY_IM:
    				$result = $this->msg_jabber();
    			break;
    
    			case NOTIFY_BOTH:
    				$result = $this->msg_email();
    				$this->msg_jabber();
    			break;
    		}
    
    		$this->reset();
    		return $result;
    	}
    
    	/**
    	* Add error message to log
    	*/
    	function error($type, $msg)
    	{
    		global $user, $config, $request, $phpbb_log;
    
    		// Session doesn't exist, create it
    		if (!isset($user->session_id) || $user->session_id === '')
    		{
    			$user->session_begin();
    		}
    
    		$calling_page = htmlspecialchars_decode($request->server('PHP_SELF'));
    
    		switch ($type)
    		{
    			case 'EMAIL':
    				$message = '<strong>EMAIL/' . (($config['smtp_delivery']) ? 'SMTP' : 'PHP/mail()') . '</strong>';
    			break;
    
    			default:
    				$message = "<strong>$type</strong>";
    			break;
    		}
    
    		$message .= '<br /><em>' . htmlspecialchars($calling_page) . '</em><br /><br />' . $msg . '<br />';
    		$phpbb_log->add('critical', $user->data['user_id'], $user->ip, 'LOG_ERROR_' . $type, false, array($message));
    	}
    
    	/**
    	* Save to queue
    	*/
    	function save_queue()
    	{
    		global $config;
    
    		if ($config['email_package_size'] && $this->use_queue && !empty($this->queue))
    		{
    			$this->queue->save();
    			return;
    		}
    	}
    
    	/**
    	* Generates a valid message id to be used in emails
    	*
    	* @return string message id
    	*/
    	function generate_message_id()
    	{
    		global $config, $request;
    
    		$domain = ($config['server_name']) ?: $request->server('SERVER_NAME', 'phpbb.generated');
    
    		return md5(unique_id(time())) . '@' . $domain;
    	}
    
    	/**
    	* Return email header
    	*/
    	function build_header($to, $cc, $bcc)
    	{
    		global $config, $phpbb_dispatcher;
    
    		// We could use keys here, but we won't do this for 3.0.x to retain backwards compatibility
    		$headers = array();
    
    		$headers[] = 'From: ' . $this->from;
    
    		if ($cc)
    		{
    			$headers[] = 'Cc: ' . $cc;
    		}
    
    		if ($bcc)
    		{
    			$headers[] = 'Bcc: ' . $bcc;
    		}
    
    		$headers[] = 'Reply-To: ' . $this->replyto;
    		$headers[] = 'Return-Path: <' . $config['board_email'] . '>';
    		$headers[] = 'Sender: <' . $config['board_email'] . '>';
    		$headers[] = 'MIME-Version: 1.0';
    		$headers[] = 'Message-ID: <' . $this->generate_message_id() . '>';
    		$headers[] = 'Date: ' . date('r', time());
    		$headers[] = 'Content-Type: text/plain; charset=UTF-8'; // format=flowed
    		$headers[] = 'Content-Transfer-Encoding: 8bit'; // 7bit
    
    		$headers[] = 'X-Priority: ' . $this->mail_priority;
    		$headers[] = 'X-MSMail-Priority: ' . (($this->mail_priority == MAIL_LOW_PRIORITY) ? 'Low' : (($this->mail_priority == MAIL_NORMAL_PRIORITY) ? 'Normal' : 'High'));
    		$headers[] = 'X-Mailer: phpBB3';
    		$headers[] = 'X-MimeOLE: phpBB3';
    		$headers[] = 'X-phpBB-Origin: phpbb://' . str_replace(array('http://', 'https://'), array('', ''), generate_board_url());
    
    		/**
    		* Event to modify email header entries
    		*
    		* @event core.modify_email_headers
    		* @var	array	headers	Array containing email header entries
    		* @since 3.1.11-RC1
    		*/
    		$vars = array('headers');
    		extract($phpbb_dispatcher->trigger_event('core.modify_email_headers', compact($vars)));
    
    		if (count($this->extra_headers))
    		{
    			$headers = array_merge($headers, $this->extra_headers);
    		}
    
    		return $headers;
    	}
    
    	/**
    	* Send out emails
    	*/
    	function msg_email()
    	{
    		global $config, $phpbb_dispatcher;
    
    		if (empty($config['email_enable']))
    		{
    			return false;
    		}
    
    		// Addresses to send to?
    		if (empty($this->addresses) || (empty($this->addresses['to']) && empty($this->addresses['cc']) && empty($this->addresses['bcc'])))
    		{
    			// Send was successful. ;)
    			return true;
    		}
    
    		$use_queue = false;
    		if ($config['email_package_size'] && $this->use_queue)
    		{
    			if (empty($this->queue))
    			{
    				$this->queue = new queue();
    				$this->queue->init('email', $config['email_package_size']);
    			}
    			$use_queue = true;
    		}
    
    		$contact_name = htmlspecialchars_decode($config['board_contact_name']);
    		$board_contact = (($contact_name !== '') ? '"' . mail_encode($contact_name) . '" ' : '') . '<' . $config['board_contact'] . '>';
    
    		$break = false;
    		$addresses = $this->addresses;
    		$subject = $this->subject;
    		$msg = $this->msg;
    		/**
    		* Event to send message via external transport
    		*
    		* @event core.notification_message_email
    		* @var	bool	break		Flag indicating if the function return after hook
    		* @var	array	addresses 	The message recipients
    		* @var	string	subject		The message subject
    		* @var	string	msg			The message text
    		* @since 3.2.4-RC1
    		*/
    		$vars = array(
    			'break',
    			'addresses',
    			'subject',
    			'msg',
    		);
    		extract($phpbb_dispatcher->trigger_event('core.notification_message_email', compact($vars)));
    
    		if ($break)
    		{
    			return true;
    		}
    
    		if (empty($this->replyto))
    		{
    			$this->replyto = $board_contact;
    		}
    
    		if (empty($this->from))
    		{
    			$this->from = $board_contact;
    		}
    
    		$encode_eol = ($config['smtp_delivery']) ? "\r\n" : PHP_EOL;
    
    		// Build to, cc and bcc strings
    		$to = $cc = $bcc = '';
    		foreach ($this->addresses as $type => $address_ary)
    		{
    			if ($type == 'im')
    			{
    				continue;
    			}
    
    			foreach ($address_ary as $which_ary)
    			{
    				${$type} .= ((${$type} != '') ? ', ' : '') . (($which_ary['name'] != '') ? mail_encode($which_ary['name'], $encode_eol) . ' <' . $which_ary['email'] . '>' : $which_ary['email']);
    			}
    		}
    
    		// Build header
    		$headers = $this->build_header($to, $cc, $bcc);
    
    		// Send message ...
    		if (!$use_queue)
    		{
    			$mail_to = ($to == '') ? 'undisclosed-recipients:;' : $to;
    			$err_msg = '';
    
    			if ($config['smtp_delivery'])
    			{
    				$result = smtpmail($this->addresses, mail_encode($this->subject), wordwrap(utf8_wordwrap($this->msg), 997, "\n", true), $err_msg, $headers);
    			}
    			else
    			{
    				$result = phpbb_mail($mail_to, $this->subject, $this->msg, $headers, PHP_EOL, $err_msg);
    			}
    
    			if (!$result)
    			{
    				$this->error('EMAIL', $err_msg);
    				return false;
    			}
    		}
    		else
    		{
    			$this->queue->put('email', array(
    				'to'			=> $to,
    				'addresses'		=> $this->addresses,
    				'subject'		=> $this->subject,
    				'msg'			=> $this->msg,
    				'headers'		=> $headers)
    			);
    		}
    
    		return true;
    	}
    
    	/**
    	* Send jabber message out
    	*/
    	function msg_jabber()
    	{
    		global $config, $user, $phpbb_root_path, $phpEx;
    
    		if (empty($config['jab_enable']) || empty($config['jab_host']) || empty($config['jab_username']) || empty($config['jab_password']))
    		{
    			return false;
    		}
    
    		if (empty($this->addresses['im']))
    		{
    			// Send was successful. ;)
    			return true;
    		}
    
    		$use_queue = false;
    		if ($config['jab_package_size'] && $this->use_queue)
    		{
    			if (empty($this->queue))
    			{
    				$this->queue = new queue();
    				$this->queue->init('jabber', $config['jab_package_size']);
    			}
    			$use_queue = true;
    		}
    
    		$addresses = array();
    		foreach ($this->addresses['im'] as $type => $uid_ary)
    		{
    			$addresses[] = $uid_ary['uid'];
    		}
    		$addresses = array_unique($addresses);
    
    		if (!$use_queue)
    		{
    			include_once($phpbb_root_path . 'includes/functions_jabber.' . $phpEx);
    			$this->jabber = new jabber($config['jab_host'], $config['jab_port'], $config['jab_username'], htmlspecialchars_decode($config['jab_password']), $config['jab_use_ssl'], $config['jab_verify_peer'], $config['jab_verify_peer_name'], $config['jab_allow_self_signed']);
    
    			if (!$this->jabber->connect())
    			{
    				$this->error('JABBER', $user->lang['ERR_JAB_CONNECT'] . '<br />' . $this->jabber->get_log());
    				return false;
    			}
    
    			if (!$this->jabber->login())
    			{
    				$this->error('JABBER', $user->lang['ERR_JAB_AUTH'] . '<br />' . $this->jabber->get_log());
    				return false;
    			}
    
    			foreach ($addresses as $address)
    			{
    				$this->jabber->send_message($address, $this->msg, $this->subject);
    			}
    
    			$this->jabber->disconnect();
    		}
    		else
    		{
    			$this->queue->put('jabber', array(
    				'addresses'		=> $addresses,
    				'subject'		=> $this->subject,
    				'msg'			=> $this->msg)
    			);
    		}
    		unset($addresses);
    		return true;
    	}
    
    	/**
    	* Setup template engine
    	*/
    	protected function setup_template()
    	{
    		global $phpbb_container, $phpbb_dispatcher;
    
    		if ($this->template instanceof \phpbb\template\template)
    		{
    			return;
    		}
    
    		$template_environment = new \phpbb\template\twig\environment(
    			$phpbb_container->get('config'),
    			$phpbb_container->get('filesystem'),
    			$phpbb_container->get('path_helper'),
    			$phpbb_container->getParameter('core.template.cache_path'),
    			$phpbb_container->get('ext.manager'),
    			new \phpbb\template\twig\loader(
    				$phpbb_container->get('filesystem')
    			),
    			$phpbb_dispatcher,
    			array()
    		);
    		$template_environment->setLexer($phpbb_container->get('template.twig.lexer'));
    
    		$this->template = new \phpbb\template\twig\twig(
    			$phpbb_container->get('path_helper'),
    			$phpbb_container->get('config'),
    			new \phpbb\template\context(),
    			$template_environment,
    			$phpbb_container->getParameter('core.template.cache_path'),
    			$phpbb_container->get('user'),
    			$phpbb_container->get('template.twig.extensions.collection'),
    			$phpbb_container->get('ext.manager')
    		);
    	}
    
    	/**
    	* Set template paths to load
    	*/
    	protected function set_template_paths($path_name, $paths)
    	{
    		$this->setup_template();
    
    		$this->template->set_custom_style($path_name, $paths);
    	}
    }
    
    /**
    * handling email and jabber queue
    */
    class queue
    {
    	var $data = array();
    	var $queue_data = array();
    	var $package_size = 0;
    	var $cache_file = '';
    	var $eol = "\n";
    
    	/**
    	 * @var \phpbb\filesystem\filesystem_interface
    	 */
    	protected $filesystem;
    
    	/**
    	* constructor
    	*/
    	function __construct()
    	{
    		global $phpEx, $phpbb_root_path, $phpbb_filesystem, $phpbb_container;
    
    		$this->data = array();
    		$this->cache_file = $phpbb_container->getParameter('core.cache_dir') . "queue.$phpEx";
    		$this->filesystem = $phpbb_filesystem;
    	}
    
    	/**
    	* Init a queue object
    	*/
    	function init($object, $package_size)
    	{
    		$this->data[$object] = array();
    		$this->data[$object]['package_size'] = $package_size;
    		$this->data[$object]['data'] = array();
    	}
    
    	/**
    	* Put object in queue
    	*/
    	function put($object, $scope)
    	{
    		$this->data[$object]['data'][] = $scope;
    	}
    
    	/**
    	* Process queue
    	* Using lock file
    	*/
    	function process()
    	{
    		global $config, $phpEx, $phpbb_root_path, $user, $phpbb_dispatcher;
    
    		$lock = new \phpbb\lock\flock($this->cache_file);
    		$lock->acquire();
    
    		// avoid races, check file existence once
    		$have_cache_file = file_exists($this->cache_file);
    		if (!$have_cache_file || $config['last_queue_run'] > time() - $config['queue_interval'])
    		{
    			if (!$have_cache_file)
    			{
    				$config->set('last_queue_run', time(), false);
    			}
    
    			$lock->release();
    			return;
    		}
    
    		$config->set('last_queue_run', time(), false);
    
    		include($this->cache_file);
    
    		foreach ($this->queue_data as $object => $data_ary)
    		{
    			@set_time_limit(0);
    
    			if (!isset($data_ary['package_size']))
    			{
    				$data_ary['package_size'] = 0;
    			}
    
    			$package_size = $data_ary['package_size'];
    			$num_items = (!$package_size || count($data_ary['data']) < $package_size) ? count($data_ary['data']) : $package_size;
    
    			/*
    			* This code is commented out because it causes problems on some web hosts.
    			* The core problem is rather restrictive email sending limits.
    			* This code is nly useful if you have no such restrictions from the
    			* web host and the package size setting is wrong.
    
    			// If the amount of emails to be sent is way more than package_size than we need to increase it to prevent backlogs...
    			if (count($data_ary['data']) > $package_size * 2.5)
    			{
    				$num_items = count($data_ary['data']);
    			}
    			*/
    
    			switch ($object)
    			{
    				case 'email':
    					// Delete the email queued objects if mailing is disabled
    					if (!$config['email_enable'])
    					{
    						unset($this->queue_data['email']);
    						continue 2;
    					}
    				break;
    
    				case 'jabber':
    					if (!$config['jab_enable'])
    					{
    						unset($this->queue_data['jabber']);
    						continue 2;
    					}
    
    					include_once($phpbb_root_path . 'includes/functions_jabber.' . $phpEx);
    					$this->jabber = new jabber($config['jab_host'], $config['jab_port'], $config['jab_username'], htmlspecialchars_decode($config['jab_password']), $config['jab_use_ssl'], $config['jab_verify_peer'], $config['jab_verify_peer_name'], $config['jab_allow_self_signed']);
    
    					if (!$this->jabber->connect())
    					{
    						$messenger = new messenger();
    						$messenger->error('JABBER', $user->lang['ERR_JAB_CONNECT']);
    						continue 2;
    					}
    
    					if (!$this->jabber->login())
    					{
    						$messenger = new messenger();
    						$messenger->error('JABBER', $user->lang['ERR_JAB_AUTH']);
    						continue 2;
    					}
    
    				break;
    
    				default:
    					$lock->release();
    					return;
    			}
    
    			for ($i = 0; $i < $num_items; $i++)
    			{
    				// Make variables available...
    				extract(array_shift($this->queue_data[$object]['data']));
    
    				switch ($object)
    				{
    					case 'email':
    						$break = false;
    						/**
    						* Event to send message via external transport
    						*
    						* @event core.notification_message_process
    						* @var	bool	break		Flag indicating if the function return after hook
    						* @var	array	addresses 	The message recipients
    						* @var	string	subject		The message subject
    						* @var	string	msg			The message text
    						* @since 3.2.4-RC1
    						*/
    						$vars = array(
    							'break',
    							'addresses',
    							'subject',
    							'msg',
    						);
    						extract($phpbb_dispatcher->trigger_event('core.notification_message_process', compact($vars)));
    
    						if (!$break)
    						{
    							$err_msg = '';
    							$to = (!$to) ? 'undisclosed-recipients:;' : $to;
    
    							if ($config['smtp_delivery'])
    							{
    								$result = smtpmail($addresses, mail_encode($subject), wordwrap(utf8_wordwrap($msg), 997, "\n", true), $err_msg, $headers);
    							}
    							else
    							{
    								$result = phpbb_mail($to, $subject, $msg, $headers, PHP_EOL, $err_msg);
    							}
    
    							if (!$result)
    							{
    								$messenger = new messenger();
    								$messenger->error('EMAIL', $err_msg);
    								continue 2;
    							}
    						}
    					break;
    
    					case 'jabber':
    						foreach ($addresses as $address)
    						{
    							if ($this->jabber->send_message($address, $msg, $subject) === false)
    							{
    								$messenger = new messenger();
    								$messenger->error('JABBER', $this->jabber->get_log());
    								continue 3;
    							}
    						}
    					break;
    				}
    			}
    
    			// No more data for this object? Unset it
    			if (!count($this->queue_data[$object]['data']))
    			{
    				unset($this->queue_data[$object]);
    			}
    
    			// Post-object processing
    			switch ($object)
    			{
    				case 'jabber':
    					// Hang about a couple of secs to ensure the messages are
    					// handled, then disconnect
    					$this->jabber->disconnect();
    				break;
    			}
    		}
    
    		if (!count($this->queue_data))
    		{
    			@unlink($this->cache_file);
    		}
    		else
    		{
    			if ($fp = @fopen($this->cache_file, 'wb'))
    			{
    				fwrite($fp, "<?php\nif (!defined('IN_PHPBB')) exit;\n\$this->queue_data = unserialize(" . var_export(serialize($this->queue_data), true) . ");\n\n?>");
    				fclose($fp);
    
    				if (function_exists('opcache_invalidate'))
    				{
    					@opcache_invalidate($this->cache_file);
    				}
    
    				try
    				{
    					$this->filesystem->phpbb_chmod($this->cache_file, \phpbb\filesystem\filesystem_interface::CHMOD_READ | \phpbb\filesystem\filesystem_interface::CHMOD_WRITE);
    				}
    				catch (\phpbb\filesystem\exception\filesystem_exception $e)
    				{
    					// Do nothing
    				}
    			}
    		}
    
    		$lock->release();
    	}
    
    	/**
    	* Save queue
    	*/
    	function save()
    	{
    		if (!count($this->data))
    		{
    			return;
    		}
    
    		$lock = new \phpbb\lock\flock($this->cache_file);
    		$lock->acquire();
    
    		if (file_exists($this->cache_file))
    		{
    			include($this->cache_file);
    
    			foreach ($this->queue_data as $object => $data_ary)
    			{
    				if (isset($this->data[$object]) && count($this->data[$object]))
    				{
    					$this->data[$object]['data'] = array_merge($data_ary['data'], $this->data[$object]['data']);
    				}
    				else
    				{
    					$this->data[$object]['data'] = $data_ary['data'];
    				}
    			}
    		}
    
    		if ($fp = @fopen($this->cache_file, 'w'))
    		{
    			fwrite($fp, "<?php\nif (!defined('IN_PHPBB')) exit;\n\$this->queue_data = unserialize(" . var_export(serialize($this->data), true) . ");\n\n?>");
    			fclose($fp);
    
    			if (function_exists('opcache_invalidate'))
    			{
    				@opcache_invalidate($this->cache_file);
    			}
    
    			try
    			{
    				$this->filesystem->phpbb_chmod($this->cache_file, \phpbb\filesystem\filesystem_interface::CHMOD_READ | \phpbb\filesystem\filesystem_interface::CHMOD_WRITE);
    			}
    			catch (\phpbb\filesystem\exception\filesystem_exception $e)
    			{
    				// Do nothing
    			}
    
    			$this->data = array();
    		}
    
    		$lock->release();
    	}
    }
    
    /**
    * Replacement or substitute for PHP's mail command
    */
    function smtpmail($addresses, $subject, $message, &$err_msg, $headers = false)
    {
    	global $config, $user;
    
    	// Fix any bare linefeeds in the message to make it RFC821 Compliant.
    	$message = preg_replace("#(?<!\r)\n#si", "\r\n", $message);
    
    	if ($headers !== false)
    	{
    		if (!is_array($headers))
    		{
    			// Make sure there are no bare linefeeds in the headers
    			$headers = preg_replace('#(?<!\r)\n#si', "\n", $headers);
    			$headers = explode("\n", $headers);
    		}
    
    		// Ok this is rather confusing all things considered,
    		// but we have to grab bcc and cc headers and treat them differently
    		// Something we really didn't take into consideration originally
    		$headers_used = array();
    
    		foreach ($headers as $header)
    		{
    			if (strpos(strtolower($header), 'cc:') === 0 || strpos(strtolower($header), 'bcc:') === 0)
    			{
    				continue;
    			}
    			$headers_used[] = trim($header);
    		}
    
    		$headers = chop(implode("\r\n", $headers_used));
    	}
    
    	if (trim($subject) == '')
    	{
    		$err_msg = (isset($user->lang['NO_EMAIL_SUBJECT'])) ? $user->lang['NO_EMAIL_SUBJECT'] : 'No email subject specified';
    		return false;
    	}
    
    	if (trim($message) == '')
    	{
    		$err_msg = (isset($user->lang['NO_EMAIL_MESSAGE'])) ? $user->lang['NO_EMAIL_MESSAGE'] : 'Email message was blank';
    		return false;
    	}
    
    	$mail_rcpt = $mail_to = $mail_cc = array();
    
    	// Build correct addresses for RCPT TO command and the client side display (TO, CC)
    	if (isset($addresses['to']) && count($addresses['to']))
    	{
    		foreach ($addresses['to'] as $which_ary)
    		{
    			$mail_to[] = ($which_ary['name'] != '') ? mail_encode(trim($which_ary['name'])) . ' <' . trim($which_ary['email']) . '>' : '<' . trim($which_ary['email']) . '>';
    			$mail_rcpt['to'][] = '<' . trim($which_ary['email']) . '>';
    		}
    	}
    
    	if (isset($addresses['bcc']) && count($addresses['bcc']))
    	{
    		foreach ($addresses['bcc'] as $which_ary)
    		{
    			$mail_rcpt['bcc'][] = '<' . trim($which_ary['email']) . '>';
    		}
    	}
    
    	if (isset($addresses['cc']) && count($addresses['cc']))
    	{
    		foreach ($addresses['cc'] as $which_ary)
    		{
    			$mail_cc[] = ($which_ary['name'] != '') ? mail_encode(trim($which_ary['name'])) . ' <' . trim($which_ary['email']) . '>' : '<' . trim($which_ary['email']) . '>';
    			$mail_rcpt['cc'][] = '<' . trim($which_ary['email']) . '>';
    		}
    	}
    
    	$smtp = new smtp_class();
    
    	$errno = 0;
    	$errstr = '';
    
    	$smtp->add_backtrace('Connecting to ' . $config['smtp_host'] . ':' . $config['smtp_port']);
    
    	// Ok we have error checked as much as we can to this point let's get on it already.
    	if (!class_exists('\phpbb\error_collector'))
    	{
    		global $phpbb_root_path, $phpEx;
    		include($phpbb_root_path . 'includes/error_collector.' . $phpEx);
    	}
    	$collector = new \phpbb\error_collector;
    	$collector->install();
    
    	$options = array();
    	$verify_peer = (bool) $config['smtp_verify_peer'];
    	$verify_peer_name = (bool) $config['smtp_verify_peer_name'];
    	$allow_self_signed = (bool) $config['smtp_allow_self_signed'];
    	$remote_socket = $config['smtp_host'] . ':' . $config['smtp_port'];
    
    	// Set ssl context options, see http://php.net/manual/en/context.ssl.php
    	$options['ssl'] = array('verify_peer' => $verify_peer, 'verify_peer_name' => $verify_peer_name, 'allow_self_signed' => $allow_self_signed);
    	$socket_context = stream_context_create($options);
    
    	$smtp->socket = @stream_socket_client($remote_socket, $errno, $errstr, 20, STREAM_CLIENT_CONNECT, $socket_context);
    	$collector->uninstall();
    	$error_contents = $collector->format_errors();
    
    	if (!$smtp->socket)
    	{
    		if ($errstr)
    		{
    			$errstr = utf8_convert_message($errstr);
    		}
    
    		$err_msg = (isset($user->lang['NO_CONNECT_TO_SMTP_HOST'])) ? sprintf($user->lang['NO_CONNECT_TO_SMTP_HOST'], $errno, $errstr) : "Could not connect to smtp host : $errno : $errstr";
    		$err_msg .= ($error_contents) ? '<br /><br />' . htmlspecialchars($error_contents) : '';
    		return false;
    	}
    
    	// Wait for reply
    	if ($err_msg = $smtp->server_parse('220', __LINE__))
    	{
    		$smtp->close_session($err_msg);
    		return false;
    	}
    
    	// Let me in. This function handles the complete authentication process
    	if ($err_msg = $smtp->log_into_server($config['smtp_host'], $config['smtp_username'], htmlspecialchars_decode($config['smtp_password']), $config['smtp_auth_method']))
    	{
    		$smtp->close_session($err_msg);
    		return false;
    	}
    
    	// From this point onward most server response codes should be 250
    	// Specify who the mail is from....
    	$smtp->server_send('MAIL FROM:<' . $config['board_email'] . '>');
    	if ($err_msg = $smtp->server_parse('250', __LINE__))
    	{
    		$smtp->close_session($err_msg);
    		return false;
    	}
    
    	// Specify each user to send to and build to header.
    	$to_header = implode(', ', $mail_to);
    	$cc_header = implode(', ', $mail_cc);
    
    	// Now tell the MTA to send the Message to the following people... [TO, BCC, CC]
    	$rcpt = false;
    	foreach ($mail_rcpt as $type => $mail_to_addresses)
    	{
    		foreach ($mail_to_addresses as $mail_to_address)
    		{
    			// Add an additional bit of error checking to the To field.
    			if (preg_match('#[^ ]+\@[^ ]+#', $mail_to_address))
    			{
    				$smtp->server_send("RCPT TO:$mail_to_address");
    				if ($err_msg = $smtp->server_parse('250', __LINE__))
    				{
    					// We continue... if users are not resolved we do not care
    					if ($smtp->numeric_response_code != 550)
    					{
    						$smtp->close_session($err_msg);
    						return false;
    					}
    				}
    				else
    				{
    					$rcpt = true;
    				}
    			}
    		}
    	}
    
    	// We try to send messages even if a few people do not seem to have valid email addresses, but if no one has, we have to exit here.
    	if (!$rcpt)
    	{
    		$user->session_begin();
    		$err_msg .= '<br /><br />';
    		$err_msg .= (isset($user->lang['INVALID_EMAIL_LOG'])) ? sprintf($user->lang['INVALID_EMAIL_LOG'], htmlspecialchars($mail_to_address)) : '<strong>' . htmlspecialchars($mail_to_address) . '</strong> possibly an invalid email address?';
    		$smtp->close_session($err_msg);
    		return false;
    	}
    
    	// Ok now we tell the server we are ready to start sending data
    	$smtp->server_send('DATA');
    
    	// This is the last response code we look for until the end of the message.
    	if ($err_msg = $smtp->server_parse('354', __LINE__))
    	{
    		$smtp->close_session($err_msg);
    		return false;
    	}
    
    	// Send the Subject Line...
    	$smtp->server_send("Subject: $subject");
    
    	// Now the To Header.
    	$to_header = ($to_header == '') ? 'undisclosed-recipients:;' : $to_header;
    	$smtp->server_send("To: $to_header");
    
    	// Now the CC Header.
    	if ($cc_header != '')
    	{
    		$smtp->server_send("CC: $cc_header");
    	}
    
    	// Now any custom headers....
    	if ($headers !== false)
    	{
    		$smtp->server_send("$headers\r\n");
    	}
    
    	// Ok now we are ready for the message...
    	$smtp->server_send($message);
    
    	// Ok the all the ingredients are mixed in let's cook this puppy...
    	$smtp->server_send('.');
    	if ($err_msg = $smtp->server_parse('250', __LINE__))
    	{
    		$smtp->close_session($err_msg);
    		return false;
    	}
    
    	// Now tell the server we are done and close the socket...
    	$smtp->server_send('QUIT');
    	$smtp->close_session($err_msg);
    
    	return true;
    }
    
    /**
    * SMTP Class
    * Auth Mechanisms originally taken from the AUTH Modules found within the PHP Extension and Application Repository (PEAR)
    * See docs/AUTHORS for more details
    */
    class smtp_class
    {
    	var $server_response = '';
    	var $socket = 0;
    	protected $socket_tls = false;
    	var $responses = array();
    	var $commands = array();
    	var $numeric_response_code = 0;
    
    	var $backtrace = false;
    	var $backtrace_log = array();
    
    	function __construct()
    	{
    		// Always create a backtrace for admins to identify SMTP problems
    		$this->backtrace = true;
    		$this->backtrace_log = array();
    	}
    
    	/**
    	* Add backtrace message for debugging
    	*/
    	function add_backtrace($message)
    	{
    		if ($this->backtrace)
    		{
    			$this->backtrace_log[] = utf8_htmlspecialchars($message);
    		}
    	}
    
    	/**
    	* Send command to smtp server
    	*/
    	function server_send($command, $private_info = false)
    	{
    		fputs($this->socket, $command . "\r\n");
    
    		(!$private_info) ? $this->add_backtrace("# $command") : $this->add_backtrace('# Omitting sensitive information');
    
    		// We could put additional code here
    	}
    
    	/**
    	* We use the line to give the support people an indication at which command the error occurred
    	*/
    	function server_parse($response, $line)
    	{
    		global $user;
    
    		$this->server_response = '';
    		$this->responses = array();
    		$this->numeric_response_code = 0;
    
    		while (substr($this->server_response, 3, 1) != ' ')
    		{
    			if (!($this->server_response = fgets($this->socket, 256)))
    			{
    				return (isset($user->lang['NO_EMAIL_RESPONSE_CODE'])) ? $user->lang['NO_EMAIL_RESPONSE_CODE'] : 'Could not get mail server response codes';
    			}
    			$this->responses[] = substr(rtrim($this->server_response), 4);
    			$this->numeric_response_code = (int) substr($this->server_response, 0, 3);
    
    			$this->add_backtrace("LINE: $line <- {$this->server_response}");
    		}
    
    		if (!(substr($this->server_response, 0, 3) == $response))
    		{
    			$this->numeric_response_code = (int) substr($this->server_response, 0, 3);
    			return (isset($user->lang['EMAIL_SMTP_ERROR_RESPONSE'])) ? sprintf($user->lang['EMAIL_SMTP_ERROR_RESPONSE'], $line, $this->server_response) : "Ran into problems sending Mail at <strong>Line $line</strong>. Response: $this->server_response";
    		}
    
    		return 0;
    	}
    
    	/**
    	* Close session
    	*/
    	function close_session(&$err_msg)
    	{
    		fclose($this->socket);
    
    		if ($this->backtrace)
    		{
    			$message = '<h1>Backtrace</h1><p>' . implode('<br />', $this->backtrace_log) . '</p>';
    			$err_msg .= $message;
    		}
    	}
    
    	/**
    	* Log into server and get possible auth codes if neccessary
    	*/
    	function log_into_server($hostname, $username, $password, $default_auth_method)
    	{
    		global $user;
    
    		// Here we try to determine the *real* hostname (reverse DNS entry preferrably)
    		$local_host = $user->host;
    
    		if (function_exists('php_uname'))
    		{
    			$local_host = php_uname('n');
    
    			// Able to resolve name to IP
    			if (($addr = @gethostbyname($local_host)) !== $local_host)
    			{
    				// Able to resolve IP back to name
    				if (($name = @gethostbyaddr($addr)) !== $addr)
    				{
    					$local_host = $name;
    				}
    			}
    		}
    
    		// If we are authenticating through pop-before-smtp, we
    		// have to login ones before we get authenticated
    		// NOTE: on some configurations the time between an update of the auth database takes so
    		// long that the first email send does not work. This is not a biggie on a live board (only
    		// the install mail will most likely fail) - but on a dynamic ip connection this might produce
    		// severe problems and is not fixable!
    		if ($default_auth_method == 'POP-BEFORE-SMTP' && $username && $password)
    		{
    			global $config;
    
    			$errno = 0;
    			$errstr = '';
    
    			$this->server_send("QUIT");
    			fclose($this->socket);
    
    			$this->pop_before_smtp($hostname, $username, $password);
    			$username = $password = $default_auth_method = '';
    
    			// We need to close the previous session, else the server is not
    			// able to get our ip for matching...
    			if (!$this->socket = @fsockopen($config['smtp_host'], $config['smtp_port'], $errno, $errstr, 10))
    			{
    				if ($errstr)
    				{
    					$errstr = utf8_convert_message($errstr);
    				}
    
    				$err_msg = (isset($user->lang['NO_CONNECT_TO_SMTP_HOST'])) ? sprintf($user->lang['NO_CONNECT_TO_SMTP_HOST'], $errno, $errstr) : "Could not connect to smtp host : $errno : $errstr";
    				return $err_msg;
    			}
    
    			// Wait for reply
    			if ($err_msg = $this->server_parse('220', __LINE__))
    			{
    				$this->close_session($err_msg);
    				return $err_msg;
    			}
    		}
    
    		$hello_result = $this->hello($local_host);
    		if (!is_null($hello_result))
    		{
    			return $hello_result;
    		}
    
    		// SMTP STARTTLS (RFC 3207)
    		if (!$this->socket_tls)
    		{
    			$this->socket_tls = $this->starttls();
    
    			if ($this->socket_tls)
    			{
    				// Switched to TLS
    				// RFC 3207: "The client MUST discard any knowledge obtained from the server, [...]"
    				// So say hello again
    				$hello_result = $this->hello($local_host);
    
    				if (!is_null($hello_result))
    				{
    					return $hello_result;
    				}
    			}
    		}
    
    		// If we are not authenticated yet, something might be wrong if no username and passwd passed
    		if (!$username || !$password)
    		{
    			return false;
    		}
    
    		if (!isset($this->commands['AUTH']))
    		{
    			return (isset($user->lang['SMTP_NO_AUTH_SUPPORT'])) ? $user->lang['SMTP_NO_AUTH_SUPPORT'] : 'SMTP server does not support authentication';
    		}
    
    		// Get best authentication method
    		$available_methods = explode(' ', $this->commands['AUTH']);
    
    		// Define the auth ordering if the default auth method was not found
    		$auth_methods = array('PLAIN', 'LOGIN', 'CRAM-MD5', 'DIGEST-MD5');
    		$method = '';
    
    		if (in_array($default_auth_method, $available_methods))
    		{
    			$method = $default_auth_method;
    		}
    		else
    		{
    			foreach ($auth_methods as $_method)
    			{
    				if (in_array($_method, $available_methods))
    				{
    					$method = $_method;
    					break;
    				}
    			}
    		}
    
    		if (!$method)
    		{
    			return (isset($user->lang['NO_SUPPORTED_AUTH_METHODS'])) ? $user->lang['NO_SUPPORTED_AUTH_METHODS'] : 'No supported authentication methods';
    		}
    
    		$method = strtolower(str_replace('-', '_', $method));
    		return $this->$method($username, $password);
    	}
    
    	/**
    	* SMTP EHLO/HELO
    	*
    	* @return mixed		Null if the authentication process is supposed to continue
    	*					False if already authenticated
    	*					Error message (string) otherwise
    	*/
    	protected function hello($hostname)
    	{
    		// Try EHLO first
    		$this->server_send("EHLO $hostname");
    		if ($err_msg = $this->server_parse('250', __LINE__))
    		{
    			// a 503 response code means that we're already authenticated
    			if ($this->numeric_response_code == 503)
    			{
    				return false;
    			}
    
    			// If EHLO fails, we try HELO
    			$this->server_send("HELO $hostname");
    			if ($err_msg = $this->server_parse('250', __LINE__))
    			{
    				return ($this->numeric_response_code == 503) ? false : $err_msg;
    			}
    		}
    
    		foreach ($this->responses as $response)
    		{
    			$response = explode(' ', $response);
    			$response_code = $response[0];
    			unset($response[0]);
    			$this->commands[$response_code] = implode(' ', $response);
    		}
    	}
    
    	/**
    	* SMTP STARTTLS (RFC 3207)
    	*
    	* @return bool		Returns true if TLS was started
    	*					Otherwise false
    	*/
    	protected function starttls()
    	{
    		global $config;
    
    		// allow SMTPS (what was used by phpBB 3.0) if hostname is prefixed with tls:// or ssl://
    		if (strpos($config['smtp_host'], 'tls://') === 0 || strpos($config['smtp_host'], 'ssl://') === 0)
    		{
    			return true;
    		}
    
    		if (!function_exists('stream_socket_enable_crypto'))
    		{
    			return false;
    		}
    
    		if (!isset($this->commands['STARTTLS']))
    		{
    			return false;
    		}
    
    		$this->server_send('STARTTLS');
    
    		if ($err_msg = $this->server_parse('220', __LINE__))
    		{
    			return false;
    		}
    
    		$result = false;
    		$stream_meta = stream_get_meta_data($this->socket);
    
    		if (socket_set_blocking($this->socket, 1))
    		{
    			// https://secure.php.net/manual/en/function.stream-socket-enable-crypto.php#119122
    			$crypto = (phpbb_version_compare(PHP_VERSION, '5.6.7', '<')) ? STREAM_CRYPTO_METHOD_TLS_CLIENT : STREAM_CRYPTO_METHOD_SSLv23_CLIENT;
    			$result = stream_socket_enable_crypto($this->socket, true, $crypto);
    			socket_set_blocking($this->socket, (int) $stream_meta['blocked']);
    		}
    
    		return $result;
    	}
    
    	/**
    	* Pop before smtp authentication
    	*/
    	function pop_before_smtp($hostname, $username, $password)
    	{
    		global $user;
    
    		if (!$this->socket = @fsockopen($hostname, 110, $errno, $errstr, 10))
    		{
    			if ($errstr)
    			{
    				$errstr = utf8_convert_message($errstr);
    			}
    
    			return (isset($user->lang['NO_CONNECT_TO_SMTP_HOST'])) ? sprintf($user->lang['NO_CONNECT_TO_SMTP_HOST'], $errno, $errstr) : "Could not connect to smtp host : $errno : $errstr";
    		}
    
    		$this->server_send("USER $username", true);
    		if ($err_msg = $this->server_parse('+OK', __LINE__))
    		{
    			return $err_msg;
    		}
    
    		$this->server_send("PASS $password", true);
    		if ($err_msg = $this->server_parse('+OK', __LINE__))
    		{
    			return $err_msg;
    		}
    
    		$this->server_send('QUIT');
    		fclose($this->socket);
    
    		return false;
    	}
    
    	/**
    	* Plain authentication method
    	*/
    	function plain($username, $password)
    	{
    		$this->server_send('AUTH PLAIN');
    		if ($err_msg = $this->server_parse('334', __LINE__))
    		{
    			return ($this->numeric_response_code == 503) ? false : $err_msg;
    		}
    
    		$base64_method_plain = base64_encode("\0" . $username . "\0" . $password);
    		$this->server_send($base64_method_plain, true);
    		if ($err_msg = $this->server_parse('235', __LINE__))
    		{
    			return $err_msg;
    		}
    
    		return false;
    	}
    
    	/**
    	* Login authentication method
    	*/
    	function login($username, $password)
    	{
    		$this->server_send('AUTH LOGIN');
    		if ($err_msg = $this->server_parse('334', __LINE__))
    		{
    			return ($this->numeric_response_code == 503) ? false : $err_msg;
    		}
    
    		$this->server_send(base64_encode($username), true);
    		if ($err_msg = $this->server_parse('334', __LINE__))
    		{
    			return $err_msg;
    		}
    
    		$this->server_send(base64_encode($password), true);
    		if ($err_msg = $this->server_parse('235', __LINE__))
    		{
    			return $err_msg;
    		}
    
    		return false;
    	}
    
    	/**
    	* cram_md5 authentication method
    	*/
    	function cram_md5($username, $password)
    	{
    		$this->server_send('AUTH CRAM-MD5');
    		if ($err_msg = $this->server_parse('334', __LINE__))
    		{
    			return ($this->numeric_response_code == 503) ? false : $err_msg;
    		}
    
    		$md5_challenge = base64_decode($this->responses[0]);
    		$password = (strlen($password) > 64) ? pack('H32', md5($password)) : ((strlen($password) < 64) ? str_pad($password, 64, chr(0)) : $password);
    		$md5_digest = md5((substr($password, 0, 64) ^ str_repeat(chr(0x5C), 64)) . (pack('H32', md5((substr($password, 0, 64) ^ str_repeat(chr(0x36), 64)) . $md5_challenge))));
    
    		$base64_method_cram_md5 = base64_encode($username . ' ' . $md5_digest);
    
    		$this->server_send($base64_method_cram_md5, true);
    		if ($err_msg = $this->server_parse('235', __LINE__))
    		{
    			return $err_msg;
    		}
    
    		return false;
    	}
    
    	/**
    	* digest_md5 authentication method
    	* A real pain in the ***
    	*/
    	function digest_md5($username, $password)
    	{
    		global $config, $user;
    
    		$this->server_send('AUTH DIGEST-MD5');
    		if ($err_msg = $this->server_parse('334', __LINE__))
    		{
    			return ($this->numeric_response_code == 503) ? false : $err_msg;
    		}
    
    		$md5_challenge = base64_decode($this->responses[0]);
    
    		// Parse the md5 challenge - from AUTH_SASL (PEAR)
    		$tokens = array();
    		while (preg_match('/^([a-z-]+)=("[^"]+(?<!\\\)"|[^,]+)/i', $md5_challenge, $matches))
    		{
    			// Ignore these as per rfc2831
    			if ($matches[1] == 'opaque' || $matches[1] == 'domain')
    			{
    				$md5_challenge = substr($md5_challenge, strlen($matches[0]) + 1);
    				continue;
    			}
    
    			// Allowed multiple "realm" and "auth-param"
    			if (!empty($tokens[$matches[1]]) && ($matches[1] == 'realm' || $matches[1] == 'auth-param'))
    			{
    				if (is_array($tokens[$matches[1]]))
    				{
    					$tokens[$matches[1]][] = preg_replace('/^"(.*)"$/', '\\1', $matches[2]);
    				}
    				else
    				{
    					$tokens[$matches[1]] = array($tokens[$matches[1]], preg_replace('/^"(.*)"$/', '\\1', $matches[2]));
    				}
    			}
    			else if (!empty($tokens[$matches[1]])) // Any other multiple instance = failure
    			{
    				$tokens = array();
    				break;
    			}
    			else
    			{
    				$tokens[$matches[1]] = preg_replace('/^"(.*)"$/', '\\1', $matches[2]);
    			}
    
    			// Remove the just parsed directive from the challenge
    			$md5_challenge = substr($md5_challenge, strlen($matches[0]) + 1);
    		}
    
    		// Realm
    		if (empty($tokens['realm']))
    		{
    			$tokens['realm'] = (function_exists('php_uname')) ? php_uname('n') : $user->host;
    		}
    
    		// Maxbuf
    		if (empty($tokens['maxbuf']))
    		{
    			$tokens['maxbuf'] = 65536;
    		}
    
    		// Required: nonce, algorithm
    		if (empty($tokens['nonce']) || empty($tokens['algorithm']))
    		{
    			$tokens = array();
    		}
    		$md5_challenge = $tokens;
    
    		if (!empty($md5_challenge))
    		{
    			$str = '';
    			for ($i = 0; $i < 32; $i++)
    			{
    				$str .= chr(mt_rand(0, 255));
    			}
    			$cnonce = base64_encode($str);
    
    			$digest_uri = 'smtp/' . $config['smtp_host'];
    
    			$auth_1 = sprintf('%s:%s:%s', pack('H32', md5(sprintf('%s:%s:%s', $username, $md5_challenge['realm'], $password))), $md5_challenge['nonce'], $cnonce);
    			$auth_2 = 'AUTHENTICATE:' . $digest_uri;
    			$response_value = md5(sprintf('%s:%s:00000001:%s:auth:%s', md5($auth_1), $md5_challenge['nonce'], $cnonce, md5($auth_2)));
    
    			$input_string = sprintf('username="%s",realm="%s",nonce="%s",cnonce="%s",nc="00000001",qop=auth,digest-uri="%s",response=%s,%d', $username, $md5_challenge['realm'], $md5_challenge['nonce'], $cnonce, $digest_uri, $response_value, $md5_challenge['maxbuf']);
    		}
    		else
    		{
    			return (isset($user->lang['INVALID_DIGEST_CHALLENGE'])) ? $user->lang['INVALID_DIGEST_CHALLENGE'] : 'Invalid digest challenge';
    		}
    
    		$base64_method_digest_md5 = base64_encode($input_string);
    		$this->server_send($base64_method_digest_md5, true);
    		if ($err_msg = $this->server_parse('334', __LINE__))
    		{
    			return $err_msg;
    		}
    
    		$this->server_send(' ');
    		if ($err_msg = $this->server_parse('235', __LINE__))
    		{
    			return $err_msg;
    		}
    
    		return false;
    	}
    }
    
    /**
    * Encodes the given string for proper display in UTF-8.
    *
    * This version is using base64 encoded data. The downside of this
    * is if the mail client does not understand this encoding the user
    * is basically doomed with an unreadable subject.
    *
    * Please note that this version fully supports RFC 2045 section 6.8.
    *
    * @param string $eol End of line we are using (optional to be backwards compatible)
    */
    function mail_encode($str, $eol = "\r\n")
    {
    	// define start delimimter, end delimiter and spacer
    	$start = "=?UTF-8?B?";
    	$end = "?=";
    	$delimiter = "$eol ";
    
    	// Maximum length is 75. $split_length *must* be a multiple of 4, but <= 75 - strlen($start . $delimiter . $end)!!!
    	$split_length = 60;
    	$encoded_str = base64_encode($str);
    
    	// If encoded string meets the limits, we just return with the correct data.
    	if (strlen($encoded_str) <= $split_length)
    	{
    		return $start . $encoded_str . $end;
    	}
    
    	// If there is only ASCII data, we just return what we want, correctly splitting the lines.
    	if (strlen($str) === utf8_strlen($str))
    	{
    		return $start . implode($end . $delimiter . $start, str_split($encoded_str, $split_length)) . $end;
    	}
    
    	// UTF-8 data, compose encoded lines
    	$array = utf8_str_split($str);
    	$str = '';
    
    	while (count($array))
    	{
    		$text = '';
    
    		while (count($array) && intval((strlen($text . $array[0]) + 2) / 3) << 2 <= $split_length)
    		{
    			$text .= array_shift($array);
    		}
    
    		$str .= $start . base64_encode($text) . $end . $delimiter;
    	}
    
    	return substr($str, 0, -strlen($delimiter));
    }
    
    /**
     * Wrapper for sending out emails with the PHP's mail function
     */
    function phpbb_mail($to, $subject, $msg, $headers, $eol, &$err_msg)
    {
    	global $config, $phpbb_root_path, $phpEx;
    
    	// Convert Numeric Character References to UTF-8 chars (ie. Emojis)
    	$subject = utf8_decode_ncr($subject);
    	$msg = utf8_decode_ncr($msg);
    
    	/**
    	 * We use the EOL character for the OS here because the PHP mail function does not correctly transform line endings.
    	 * On Windows SMTP is used (SMTP is \r\n), on UNIX a command is used...
    	 * Reference: http://bugs.php.net/bug.php?id=15841
    	 */
    	$headers = implode($eol, $headers);
    
    	if (!class_exists('\phpbb\error_collector'))
    	{
    		include($phpbb_root_path . 'includes/error_collector.' . $phpEx);
    	}
    
    	$collector = new \phpbb\error_collector;
    	$collector->install();
    
    	/**
    	 * On some PHP Versions mail() *may* fail if there are newlines within the subject.
    	 * Newlines are used as a delimiter for lines in mail_encode() according to RFC 2045 section 6.8.
    	 * Because PHP can't decide what is wanted we revert back to the non-RFC-compliant way of separating by one space
    	 * (Use '' as parameter to mail_encode() results in SPACE used)
    	 */
    	$additional_parameters = $config['email_force_sender'] ? '-f' . $config['board_email'] : '';
    
    	$result = mail($to, mail_encode($subject, ''), wordwrap(utf8_wordwrap($msg), 997, "\n", true), $headers, $additional_parameters);
    
    	$collector->uninstall();
    	$err_msg = $collector->format_errors();
    
    	return $result;
    }