13 files changed, 294 insertions, 84 deletions
diff --git a/phpBB/includes/acp/acp_forums.php b/phpBB/includes/acp/acp_forums.php
index f2f1bd80e2..4d9b9f01e0 100644
--- a/phpBB/includes/acp/acp_forums.php
+++ b/phpBB/includes/acp/acp_forums.php
@@ -1642,6 +1642,9 @@ class acp_forums
 
 		delete_attachments('topic', $topic_ids, false);
 
+		// Delete shadow topics pointing to topics in this forum
+		delete_topic_shadows($forum_id);
+
 		// Before we remove anything we make sure we are able to adjust the post counts later. ;)
 		$sql = 'SELECT poster_id
 			FROM ' . POSTS_TABLE . '
diff --git a/phpBB/includes/acp/acp_users.php b/phpBB/includes/acp/acp_users.php
index 1f10893781..9e8a4c80b9 100644
--- a/phpBB/includes/acp/acp_users.php
+++ b/phpBB/includes/acp/acp_users.php
@@ -319,10 +319,7 @@ class acp_users
 
 								$server_url = generate_board_url();
 
-								$user_actkey = gen_rand_string(10);
-								$key_len = 54 - (strlen($server_url));
-								$key_len = ($key_len > 6) ? $key_len : 6;
-								$user_actkey = substr($user_actkey, 0, $key_len);
+								$user_actkey = gen_rand_string(mt_rand(6, 10));
 								$email_template = ($user_row['user_type'] == USER_NORMAL) ? 'user_reactivate_account' : 'user_resend_inactive';
 
 								if ($user_row['user_type'] == USER_NORMAL)
diff --git a/phpBB/includes/captcha/plugins/captcha_abstract.php b/phpBB/includes/captcha/plugins/captcha_abstract.php
index e7b8742b05..21cacd730c 100644
--- a/phpBB/includes/captcha/plugins/captcha_abstract.php
+++ b/phpBB/includes/captcha/plugins/captcha_abstract.php
@@ -59,7 +59,7 @@ class phpbb_default_captcha
 	{
 		global $user;
 
-		$this->code = gen_rand_string(mt_rand(CAPTCHA_MIN_CHARS, CAPTCHA_MAX_CHARS));
+		$this->code = gen_rand_string_friendly(mt_rand(CAPTCHA_MIN_CHARS, CAPTCHA_MAX_CHARS));
 		$this->seed = hexdec(substr(unique_id(), 4, 10));
 
 		// compute $seed % 0x7fffffff
@@ -235,7 +235,7 @@ class phpbb_default_captcha
 	{
 		global $db, $user;
 
-		$this->code = gen_rand_string(mt_rand(CAPTCHA_MIN_CHARS, CAPTCHA_MAX_CHARS));
+		$this->code = gen_rand_string_friendly(mt_rand(CAPTCHA_MIN_CHARS, CAPTCHA_MAX_CHARS));
 		$this->confirm_id = md5(unique_id($user->ip));
 		$this->seed = hexdec(substr(unique_id(), 4, 10));
 		$this->solved = 0;
@@ -259,7 +259,7 @@ class phpbb_default_captcha
 	{
 		global $db, $user;
 
-		$this->code = gen_rand_string(mt_rand(CAPTCHA_MIN_CHARS, CAPTCHA_MAX_CHARS));
+		$this->code = gen_rand_string_friendly(mt_rand(CAPTCHA_MIN_CHARS, CAPTCHA_MAX_CHARS));
 		$this->seed = hexdec(substr(unique_id(), 4, 10));
 		$this->solved = 0;
 		// compute $seed % 0x7fffffff
@@ -281,7 +281,7 @@ class phpbb_default_captcha
 	{
 		global $db, $user;
 
-		$this->code = gen_rand_string(mt_rand(CAPTCHA_MIN_CHARS, CAPTCHA_MAX_CHARS));
+		$this->code = gen_rand_string_friendly(mt_rand(CAPTCHA_MIN_CHARS, CAPTCHA_MAX_CHARS));
 		$this->seed = hexdec(substr(unique_id(), 4, 10));
 		$this->solved = 0;
 		// compute $seed % 0x7fffffff
diff --git a/phpBB/includes/functions.php b/phpBB/includes/functions.php
index 4c461b5ee8..36b9e18176 100644
--- a/phpBB/includes/functions.php
+++ b/phpBB/includes/functions.php
@@ -195,10 +195,27 @@ function set_config_count($config_name, $increment, $is_dynamic = false)
 
 /**
 * Generates an alphanumeric random string of given length
+*
+* @return string
 */
 function gen_rand_string($num_chars = 8)
 {
+	// [a, z] + [0, 9] = 36
+	return substr(strtoupper(base_convert(unique_id(), 16, 36)), 0, $num_chars);
+}
+
+/**
+* Generates a user-friendly alphanumeric random string of given length
+* We remove 0 and O so users cannot confuse those in passwords etc.
+*
+* @return string
+*/
+function gen_rand_string_friendly($num_chars = 8)
+{
 	$rand_str = unique_id();
+
+	// Remove Z and Y from the base_convert(), replace 0 with Z and O with Y
+	// [a, z] + [0, 9] - {z, y} = [a, z] + [0, 9] - {0, o} = 34
 	$rand_str = str_replace(array('0', 'O'), array('Z', 'Y'), strtoupper(base_convert($rand_str, 16, 34)));
 
 	return substr($rand_str, 0, $num_chars);
@@ -3445,26 +3462,110 @@ function short_ipv6($ip, $length)
 /**
 * Wrapper for php's checkdnsrr function.
 *
-* The windows failover is from the php manual
-* Please make sure to check the return value for === true and === false, since NULL could
-* be returned too.
+* @param string $host	Fully-Qualified Domain Name
+* @param string $type	Resource record type to lookup
+*						Supported types are: MX (default), A, AAAA, NS, TXT, CNAME
+*						Other types may work or may not work
+*
+* @return mixed		true if entry found,
+*					false if entry not found,
+*					null if this function is not supported by this environment
 *
-* @return true if entry found, false if not, NULL if this function is not supported by this environment
+* Since null can also be returned, you probably want to compare the result
+* with === true or === false,
+*
+* @author bantu
 */
-function phpbb_checkdnsrr($host, $type = '')
+function phpbb_checkdnsrr($host, $type = 'MX')
 {
-	$type = (!$type) ? 'MX' : $type;
+	// The dot indicates to search the DNS root (helps those having DNS prefixes on the same domain)
+	if (substr($host, -1) == '.')
+	{
+		$host_fqdn = $host;
+		$host = substr($host, 0, -1);
+	}
+	else
+	{
+		$host_fqdn = $host . '.';
+	}
+	// $host		has format	some.host.example.com
+	// $host_fqdn	has format	some.host.example.com.
 
-	// Call checkdnsrr() if available. This is also the case on Windows with PHP 5.3 or later.
-	if (function_exists('checkdnsrr'))
+	// If we're looking for an A record we can use gethostbyname()
+	if ($type == 'A' && function_exists('gethostbyname'))
 	{
-		// The dot indicates to search the DNS root (helps those having DNS prefixes on the same domain)
-		return checkdnsrr($host . '.', $type);
+		return (@gethostbyname($host_fqdn) == $host_fqdn) ? false : true;
 	}
-	else if (DIRECTORY_SEPARATOR == '\\' && function_exists('exec'))
+
+	// checkdnsrr() is available on Windows since PHP 5.3,
+	// but until 5.3.3 it only works for MX records
+	// See: http://bugs.php.net/bug.php?id=51844
+
+	// Call checkdnsrr() if 
+	// we're looking for an MX record or
+	// we're not on Windows or
+	// we're running a PHP version where #51844 has been fixed
+
+	// checkdnsrr() supports AAAA since 5.0.0
+	// checkdnsrr() supports TXT since 5.2.4
+	if (
+		($type == 'MX' || DIRECTORY_SEPARATOR != '\\' || version_compare(PHP_VERSION, '5.3.3', '>=')) &&
+		($type != 'AAAA' || version_compare(PHP_VERSION, '5.0.0', '>=')) &&
+		($type != 'TXT' || version_compare(PHP_VERSION, '5.2.4', '>=')) &&
+		function_exists('checkdnsrr')
+	)
+	{
+		return checkdnsrr($host_fqdn, $type);
+	}
+
+	// dns_get_record() is available since PHP 5; since PHP 5.3 also on Windows,
+	// but on Windows it does not work reliable for AAAA records before PHP 5.3.1
+
+	// Call dns_get_record() if 
+	// we're not looking for an AAAA record or
+	// we're not on Windows or
+	// we're running a PHP version where AAAA lookups work reliable
+	if (
+		($type != 'AAAA' || DIRECTORY_SEPARATOR != '\\' || version_compare(PHP_VERSION, '5.3.1', '>=')) &&
+		function_exists('dns_get_record')
+	)
 	{
-		// @exec('nslookup -retry=1 -timout=1 -type=' . escapeshellarg($type) . ' ' . escapeshellarg($host), $output);
-		@exec('nslookup -type=' . escapeshellarg($type) . ' ' . escapeshellarg($host) . '.', $output);
+		// dns_get_record() expects an integer as second parameter
+		// We have to convert the string $type to the corresponding integer constant.
+		$type_constant = 'DNS_' . $type;
+		$type_param = (defined($type_constant)) ? constant($type_constant) : DNS_ANY;
+
+		// dns_get_record() might throw E_WARNING and return false for records that do not exist
+		$resultset = @dns_get_record($host_fqdn, $type_param);
+
+		if (empty($resultset) || !is_array($resultset))
+		{
+			return false;
+		}
+		else if ($type_param == DNS_ANY)
+		{
+			// $resultset is a non-empty array
+			return true;
+		}
+
+		foreach ($resultset as $result)
+		{
+			if (
+				isset($result['host']) && $result['host'] == $host && 
+				isset($result['type']) && $result['type'] == $type
+			)
+			{
+				return true;
+			}
+		}
+
+		return false;
+	}
+
+	// If we're on Windows we can still try to call nslookup via exec() as a last resort
+	if (DIRECTORY_SEPARATOR == '\\' && function_exists('exec'))
+	{
+		@exec('nslookup -type=' . escapeshellarg($type) . ' ' . escapeshellarg($host_fqdn), $output);
 
 		// If output is empty, the nslookup failed
 		if (empty($output))
@@ -3474,15 +3575,66 @@ function phpbb_checkdnsrr($host, $type = '')
 
 		foreach ($output as $line)
 		{
-			if (!trim($line))
+			$line = trim($line);
+
+			if (empty($line))
 			{
 				continue;
 			}
 
-			// Valid records begin with host name:
-			if (strpos($line, $host) === 0)
+			// Squash tabs and multiple whitespaces to a single whitespace.
+			$line = preg_replace('/\s+/', ' ', $line);
+
+			switch ($type)
 			{
-				return true;
+				case 'MX':
+					if (stripos($line, "$host MX") === 0)
+					{
+						return true;
+					}
+				break;
+
+				case 'NS':
+					if (stripos($line, "$host nameserver") === 0)
+					{
+						return true;
+					}
+				break;
+
+				case 'TXT':
+					if (stripos($line, "$host text") === 0)
+					{
+						return true;
+					}
+				break;
+
+				case 'CNAME':
+					if (stripos($line, "$host canonical name") === 0)
+					{
+						return true;
+					}
+
+				default:
+				case 'A':
+				case 'AAAA':
+					if (!empty($host_matches))
+					{
+						// Second line
+						if (stripos($line, "Address: ") === 0)
+						{
+							return true;
+						}
+						else
+						{
+							$host_matches = false;
+						}
+					}
+					else if (stripos($line, "Name: $host") === 0)
+					{
+						// First line
+						$host_matches = true;
+					}
+				break;
 			}
 		}
 
diff --git a/phpBB/includes/functions_admin.php b/phpBB/includes/functions_admin.php
index 89892feb30..3178d35c34 100644
--- a/phpBB/includes/functions_admin.php
+++ b/phpBB/includes/functions_admin.php
@@ -1125,53 +1125,65 @@ function delete_attachments($mode, $ids, $resync = true)
 }
 
 /**
-* Remove topic shadows
+* Deletes shadow topics pointing to a specified forum.
+*
+* @param int		$forum_id		The forum id
+* @param string		$sql_more		Additional WHERE statement, e.g. t.topic_time < (time() - 1234)
+* @param bool		$auto_sync		Will call sync() if this is true
+*
+* @return array		Array with affected forums
+*
+* @author bantu
 */
-function delete_topic_shadows($max_age, $forum_id = '', $auto_sync = true)
+function delete_topic_shadows($forum_id, $sql_more = '', $auto_sync = true)
 {
-	$where = (is_array($forum_id)) ? 'AND ' . $db->sql_in_set('t.forum_id', array_map('intval', $forum_id)) : (($forum_id) ? 'AND t.forum_id = ' . (int) $forum_id : '');
+	global $db;
 
-	switch ($db->sql_layer)
+	if (!$forum_id)
 	{
-		case 'mysql4':
-		case 'mysqli':
-			$sql = 'DELETE t.*
-				FROM ' . TOPICS_TABLE . ' t, ' . TOPICS_TABLE . ' t2
-				WHERE t.topic_moved_id = t2.topic_id
-					AND t.topic_time < ' . (time() - $max_age)
-				. $where;
-			$db->sql_query($sql);
-		break;
+		// Nothing to do.
+		return;
+	}
 
-		default:
-			$sql = 'SELECT t.topic_id
-				FROM ' . TOPICS_TABLE . ' t, ' . TOPICS_TABLE . ' t2
-				WHERE t.topic_moved_id = t2.topic_id
-					AND t.topic_time < ' . (time() - $max_age)
-				. $where;
-			$result = $db->sql_query($sql);
+	// Set of affected forums we have to resync
+	$sync_forum_ids = array();
 
-			$topic_ids = array();
-			while ($row = $db->sql_fetchrow($result))
-			{
-				$topic_ids[] = $row['topic_id'];
-			}
-			$db->sql_freeresult($result);
+	// Amount of topics we select and delete at once.
+	$batch_size = 500;
 
-			if (sizeof($topic_ids))
-			{
-				$sql = 'DELETE FROM ' . TOPICS_TABLE . '
-					WHERE ' . $db->sql_in_set('topic_id', $topic_ids);
-				$db->sql_query($sql);
-			}
-		break;
+	do
+	{
+		$sql = 'SELECT t2.forum_id, t2.topic_id
+			FROM ' . TOPICS_TABLE . ' t2, ' . TOPICS_TABLE . ' t
+			WHERE t2.topic_moved_id = t.topic_id
+				AND t.forum_id = ' . (int) $forum_id . '
+				' . (($sql_more) ? 'AND ' . $sql_more : '');
+		$result = $db->sql_query_limit($sql, $batch_size);
+
+		$topic_ids = array();
+		while ($row = $db->sql_fetchrow($result))
+		{
+			$topic_ids[] = (int) $row['topic_id'];
+
+			$sync_forum_ids[(int) $row['forum_id']] = (int) $row['forum_id'];
+		}
+		$db->sql_freeresult($result);
+
+		if (!empty($topic_ids))
+		{
+			$sql = 'DELETE FROM ' . TOPICS_TABLE . '
+				WHERE ' . $db->sql_in_set('topic_id', $topic_ids);
+			$db->sql_query($sql);
+		}
 	}
+	while (sizeof($topic_ids) == $batch_size);
 
 	if ($auto_sync)
 	{
-		$where_type = ($forum_id) ? 'forum_id' : '';
-		sync('forum', $where_type, $forum_id, true, true);
+		sync('forum', 'forum_id', $sync_forum_ids, true, true);
 	}
+
+	return $sync_forum_ids;
 }
 
 /**
diff --git a/phpBB/includes/functions_posting.php b/phpBB/includes/functions_posting.php
index f6f90575d4..5e25648eb8 100644
--- a/phpBB/includes/functions_posting.php
+++ b/phpBB/includes/functions_posting.php
@@ -2537,7 +2537,7 @@ function submit_post($mode, $subject, $username, $topic_type, &$poll, &$data, $u
 	if ($mode == 'post' || $mode == 'reply' || $mode == 'quote')
 	{
 		// Mark this topic as posted to
-		markread('post', $data['forum_id'], $data['topic_id'], $data['post_time']);
+		markread('post', $data['forum_id'], $data['topic_id']);
 	}
 
 	// Mark this topic as read
diff --git a/phpBB/includes/functions_user.php b/phpBB/includes/functions_user.php
index 0b26f28864..d3594196b7 100644
--- a/phpBB/includes/functions_user.php
+++ b/phpBB/includes/functions_user.php
@@ -766,7 +766,8 @@ function user_ban($mode, $ban, $ban_len, $ban_len_other, $ban_exclude, $ban_reas
 			if (sizeof($ban_other) == 3 && ((int)$ban_other[0] < 9999) &&
 				(strlen($ban_other[0]) == 4) && (strlen($ban_other[1]) == 2) && (strlen($ban_other[2]) == 2))
 			{
-				$ban_end = max($current_time, gmmktime(0, 0, 0, (int)$ban_other[1], (int)$ban_other[2], (int)$ban_other[0]));
+				$time_offset = (isset($user->timezone) && isset($user->dst)) ? (int) $user->timezone + (int) $user->dst : 0;
+				$ban_end = max($current_time, gmmktime(0, 0, 0, (int)$ban_other[1], (int)$ban_other[2], (int)$ban_other[0]) - $time_offset);
 			}
 			else
 			{
@@ -1229,22 +1230,39 @@ function user_unban($mode, $ban)
 }
 
 /**
-* Whois facility
+* Internet Protocol Address Whois
+* RFC3912: WHOIS Protocol Specification
 *
-* @link http://tools.ietf.org/html/rfc3912 RFC3912: WHOIS Protocol Specification
+* @param string $ip		Ip address, either IPv4 or IPv6.
+*
+* @return string		Empty string if not a valid ip address.
+*						Otherwise make_clickable()'ed whois result.
 */
 function user_ipwhois($ip)
 {
-	$ipwhois = '';
+	if (empty($ip))
+	{
+		return '';
+	}
 
-	// Check IP
-	// Only supporting IPv4 at the moment...
-	if (empty($ip) || !preg_match(get_preg_expression('ipv4'), $ip))
+	if (preg_match(get_preg_expression('ipv4'), $ip))
+	{
+		// IPv4 address
+		$whois_host = 'whois.arin.net.';
+	}
+	else if (preg_match(get_preg_expression('ipv6'), $ip))
+	{
+		// IPv6 address
+		$whois_host = 'whois.sixxs.net.';
+	}
+	else
 	{
 		return '';
 	}
 
-	if (($fsk = @fsockopen('whois.arin.net', 43)))
+	$ipwhois = '';
+
+	if (($fsk = @fsockopen($whois_host, 43)))
 	{
 		// CRLF as per RFC3912
 		fputs($fsk, "$ip\r\n");
@@ -1257,7 +1275,7 @@ function user_ipwhois($ip)
 
 	$match = array();
 
-	// Test for referrals from ARIN to other whois databases, roll on rwhois
+	// Test for referrals from $whois_host to other whois databases, roll on rwhois
 	if (preg_match('#ReferralServer: whois://(.+)#im', $ipwhois, $match))
 	{
 		if (strpos($match[1], ':') !== false)
@@ -1285,7 +1303,7 @@ function user_ipwhois($ip)
 			@fclose($fsk);
 		}
 
-		// Use the result from ARIN if we don't get any result here
+		// Use the result from $whois_host if we don't get any result here
 		$ipwhois = (empty($buffer)) ? $ipwhois : $buffer;
 	}
 
diff --git a/phpBB/includes/mcp/mcp_main.php b/phpBB/includes/mcp/mcp_main.php
index 80c3559649..d5551f5114 100644
--- a/phpBB/includes/mcp/mcp_main.php
+++ b/phpBB/includes/mcp/mcp_main.php
@@ -1048,6 +1048,35 @@ function mcp_fork_topic($topic_ids)
 		$total_posts = 0;
 		$new_topic_id_list = array();
 
+		if ($topic_data['enable_indexing'])
+		{
+			// Select the search method and do some additional checks to ensure it can actually be utilised
+			$search_type = basename($config['search_type']);
+
+			if (!file_exists($phpbb_root_path . 'includes/search/' . $search_type . '.' . $phpEx))
+			{
+				trigger_error('NO_SUCH_SEARCH_MODULE');
+			}
+
+			if (!class_exists($search_type))
+			{
+				include("{$phpbb_root_path}includes/search/$search_type.$phpEx");
+			}
+
+			$error = false;
+			$search = new $search_type($error);
+			$search_mode = 'post';
+
+			if ($error)
+			{
+				trigger_error($error);
+			}
+		}
+		else
+		{
+			$search_type = false;
+		}
+
 		foreach ($topic_data as $topic_id => $topic_row)
 		{
 			$sql_ary = array(
@@ -1158,6 +1187,12 @@ function mcp_fork_topic($topic_ids)
 				// Copy whether the topic is dotted
 				markread('post', $to_forum_id, $new_topic_id, 0, $row['poster_id']);
 
+				if ($search_type)
+				{
+					$search->index($search_mode, $sql_ary['post_id'], $sql_ary['post_text'], $sql_ary['post_subject'], $sql_ary['poster_id'], ($topic_row['topic_type'] == POST_GLOBAL) ? 0 : $to_forum_id);
+					$search_mode = 'reply'; // After one we index replies
+				}
+
 				// Copy Attachments
 				if ($row['post_attachment'])
 				{
diff --git a/phpBB/includes/mcp/mcp_post.php b/phpBB/includes/mcp/mcp_post.php
index 1fbedbac4f..7098b4bbce 100644
--- a/phpBB/includes/mcp/mcp_post.php
+++ b/phpBB/includes/mcp/mcp_post.php
@@ -176,7 +176,7 @@ function mcp_post_details($id, $mode, $action)
 	}
 
 	$template->assign_vars(array(
-		'U_MCP_ACTION'			=> "$url&amp;i=main&amp;quickmod=1", // Use this for mode paramaters
+		'U_MCP_ACTION'			=> "$url&amp;i=main&amp;quickmod=1&amp;mode=post_details", // Use this for mode paramaters
 		'U_POST_ACTION'			=> "$url&amp;i=$id&amp;mode=post_details", // Use this for action parameters
 		'U_APPROVE_ACTION'		=> append_sid("{$phpbb_root_path}mcp.$phpEx", "i=queue&amp;p=$post_id&amp;f={$post_info['forum_id']}"),
 
diff --git a/phpBB/includes/session.php b/phpBB/includes/session.php
index e157053e61..79023cc7bc 100644
--- a/phpBB/includes/session.php
+++ b/phpBB/includes/session.php
@@ -1831,7 +1831,7 @@ class user extends session
 		// Is load exceeded?
 		if ($config['limit_load'] && $this->load !== false)
 		{
-			if ($this->load > floatval($config['limit_load']) && !defined('IN_LOGIN'))
+			if ($this->load > floatval($config['limit_load']) && !defined('IN_LOGIN') && !defined('IN_ADMIN'))
 			{
 				// Set board disabled to true to let the admins/mods get the proper notification
 				$config['board_disable'] = '1';
diff --git a/phpBB/includes/ucp/ucp_profile.php b/phpBB/includes/ucp/ucp_profile.php
index 363a4803b6..4fd25b7d1c 100644
--- a/phpBB/includes/ucp/ucp_profile.php
+++ b/phpBB/includes/ucp/ucp_profile.php
@@ -141,10 +141,7 @@ class ucp_profile
 
 							$server_url = generate_board_url();
 
-							$user_actkey = gen_rand_string(10);
-							$key_len = 54 - (strlen($server_url));
-							$key_len = ($key_len > 6) ? $key_len : 6;
-							$user_actkey = substr($user_actkey, 0, $key_len);
+							$user_actkey = gen_rand_string(mt_rand(6, 10));
 
 							$messenger = new messenger(false);
 
diff --git a/phpBB/includes/ucp/ucp_register.php b/phpBB/includes/ucp/ucp_register.php
index 9656a4a3af..7fd99da55a 100644
--- a/phpBB/includes/ucp/ucp_register.php
+++ b/phpBB/includes/ucp/ucp_register.php
@@ -286,11 +286,7 @@ class ucp_register
 					$config['require_activation'] == USER_ACTIVATION_SELF ||
 					$config['require_activation'] == USER_ACTIVATION_ADMIN) && $config['email_enable'])
 				{
-					$user_actkey = gen_rand_string(10);
-					$key_len = 54 - (strlen($server_url));
-					$key_len = ($key_len < 6) ? 6 : $key_len;
-					$user_actkey = substr($user_actkey, 0, $key_len);
-
+					$user_actkey = gen_rand_string(mt_rand(6, 10));
 					$user_type = USER_INACTIVE;
 					$user_inactive_reason = INACTIVE_REGISTER;
 					$user_inactive_time = time();
diff --git a/phpBB/includes/ucp/ucp_remind.php b/phpBB/includes/ucp/ucp_remind.php
index f9b792de20..cb89ad99be 100644
--- a/phpBB/includes/ucp/ucp_remind.php
+++ b/phpBB/includes/ucp/ucp_remind.php
@@ -79,10 +79,10 @@ class ucp_remind
 
 			// Make password at least 8 characters long, make it longer if admin wants to.
 			// gen_rand_string() however has a limit of 12 or 13.
-			$user_password = gen_rand_string(max(8, rand((int) $config['min_pass_chars'], (int) $config['max_pass_chars'])));
+			$user_password = gen_rand_string_friendly(max(8, mt_rand((int) $config['min_pass_chars'], (int) $config['max_pass_chars'])));
 
 			// For the activation key a random length between 6 and 10 will do.
-			$user_actkey = gen_rand_string(rand(6, 10));
+			$user_actkey = gen_rand_string(mt_rand(6, 10));
 
 			$sql = 'UPDATE ' . USERS_TABLE . "
 				SET user_newpasswd = '" . $db->sql_escape(phpbb_hash($user_password)) . "', user_actkey = '" . $db->sql_escape($user_actkey) . "'