3 files changed, 39 insertions, 18 deletions
diff --git a/phpBB/phpbb/db/driver/mysqli.php b/phpBB/phpbb/db/driver/mysqli.php
index 58361ff0f8..520bb65b67 100644
--- a/phpBB/phpbb/db/driver/mysqli.php
+++ b/phpBB/phpbb/db/driver/mysqli.php
@@ -71,10 +71,17 @@ class mysqli extends \phpbb\db\driver\mysql_base
 			if (version_compare($this->sql_server_info(true), '5.0.2', '>='))
 			{
 				$result = @mysqli_query($this->db_connect_id, 'SELECT @@session.sql_mode AS sql_mode');
-				$row = @mysqli_fetch_assoc($result);
-				@mysqli_free_result($result);
+				if ($result !== null)
+				{
+					$row = @mysqli_fetch_assoc($result);
 
-				$modes = array_map('trim', explode(',', $row['sql_mode']));
+					$modes = array_map('trim', explode(',', $row['sql_mode']));
+				}
+				else
+				{
+					$modes = array();
+				}
+				@mysqli_free_result($result);
 
 				// TRADITIONAL includes STRICT_ALL_TABLES and STRICT_TRANS_TABLES
 				if (!in_array('TRADITIONAL', $modes))
@@ -109,15 +116,18 @@ class mysqli extends \phpbb\db\driver\mysql_base
 		if (!$use_cache || empty($cache) || ($this->sql_server_version = $cache->get('mysqli_version')) === false)
 		{
 			$result = @mysqli_query($this->db_connect_id, 'SELECT VERSION() AS version');
-			$row = @mysqli_fetch_assoc($result);
-			@mysqli_free_result($result);
+			if ($result !== null)
+			{
+				$row = @mysqli_fetch_assoc($result);
 
-			$this->sql_server_version = $row['version'];
+				$this->sql_server_version = $row['version'];
 
-			if (!empty($cache) && $use_cache)
-			{
-				$cache->put('mysqli_version', $this->sql_server_version);
+				if (!empty($cache) && $use_cache)
+				{
+					$cache->put('mysqli_version', $this->sql_server_version);
+				}
 			}
+			@mysqli_free_result($result);
 		}
 
 		return ($raw) ? $this->sql_server_version : 'MySQL(i) ' . $this->sql_server_version;
@@ -224,7 +234,7 @@ class mysqli extends \phpbb\db\driver\mysql_base
 			return $cache->sql_fetchrow($query_id);
 		}
 
-		if ($query_id !== false)
+		if ($query_id !== false && $query_id !== null)
 		{
 			$result = @mysqli_fetch_assoc($query_id);
 			return $result !== null ? $result : false;
@@ -434,9 +444,12 @@ class mysqli extends \phpbb\db\driver\mysql_base
 				$endtime = $endtime[0] + $endtime[1];
 
 				$result = @mysqli_query($this->db_connect_id, $query);
-				while ($void = @mysqli_fetch_assoc($result))
+				if ($result !== null)
 				{
-					// Take the time spent on parsing rows into account
+					while ($void = @mysqli_fetch_assoc($result))
+					{
+						// Take the time spent on parsing rows into account
+					}
 				}
 				@mysqli_free_result($result);
 
diff --git a/phpBB/phpbb/db/migration/data/v310/contact_admin_acp_module.php b/phpBB/phpbb/db/migration/data/v310/contact_admin_acp_module.php
index bd682e2f7c..20bd547ac3 100644
--- a/phpBB/phpbb/db/migration/data/v310/contact_admin_acp_module.php
+++ b/phpBB/phpbb/db/migration/data/v310/contact_admin_acp_module.php
@@ -1,9 +1,13 @@
 <?php
 /**
 *
-* @package migration
-* @copyright (c) 2014 phpBB Group
-* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
+* 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.
 *
 */
 
diff --git a/phpBB/phpbb/db/migration/data/v310/contact_admin_form.php b/phpBB/phpbb/db/migration/data/v310/contact_admin_form.php
index e255efb99d..c2dd09ddf6 100644
--- a/phpBB/phpbb/db/migration/data/v310/contact_admin_form.php
+++ b/phpBB/phpbb/db/migration/data/v310/contact_admin_form.php
@@ -1,9 +1,13 @@
 <?php
 /**
 *
-* @package migration
-* @copyright (c) 2014 phpBB Group
-* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
+* 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.
 *
 */