4 files changed, 9 insertions, 9 deletions
diff --git a/phpBB/phpbb/db/driver/mssql.php b/phpBB/phpbb/db/driver/mssql.php
index 50096deded..e1b41461e2 100644
--- a/phpBB/phpbb/db/driver/mssql.php
+++ b/phpBB/phpbb/db/driver/mssql.php
@@ -259,7 +259,7 @@ class mssql extends \phpbb\db\driver\driver
 		{
 			foreach ($row as $key => $value)
 			{
-				$row[$key] = ($value === ' ' || $value === NULL) ? '' : $value;
+				$row[$key] = ($value === ' ' || $value === null) ? '' : $value;
 			}
 		}
 
diff --git a/phpBB/phpbb/db/driver/mssqlnative.php b/phpBB/phpbb/db/driver/mssqlnative.php
index aade311bcb..2eb625fb11 100644
--- a/phpBB/phpbb/db/driver/mssqlnative.php
+++ b/phpBB/phpbb/db/driver/mssqlnative.php
@@ -195,7 +195,7 @@ class result_mssqlnative
 */
 class mssqlnative extends \phpbb\db\driver\mssql_base
 {
-	var $m_insert_id = NULL;
+	var $m_insert_id = null;
 	var $last_query_text = '';
 	var $query_options = array();
 	var $connect_error = '';
@@ -427,7 +427,7 @@ class mssqlnative extends \phpbb\db\driver\mssql_base
 		{
 			foreach ($row as $key => $value)
 			{
-				$row[$key] = ($value === ' ' || $value === NULL) ? '' : $value;
+				$row[$key] = ($value === ' ' || $value === null) ? '' : $value;
 			}
 
 			// remove helper values from LIMIT queries
diff --git a/phpBB/phpbb/db/driver/mysqli.php b/phpBB/phpbb/db/driver/mysqli.php
index 4d0e43b464..6144dba0c4 100644
--- a/phpBB/phpbb/db/driver/mysqli.php
+++ b/phpBB/phpbb/db/driver/mysqli.php
@@ -47,11 +47,11 @@ class mysqli extends \phpbb\db\driver\mysql_base
 		$this->server = ($this->persistency) ? 'p:' . (($sqlserver) ? $sqlserver : 'localhost') : $sqlserver;
 
 		$this->dbname = $database;
-		$port = (!$port) ? NULL : $port;
+		$port = (!$port) ? null : $port;
 
 		// If port is set and it is not numeric, most likely mysqli socket is set.
 		// Try to map it to the $socket parameter.
-		$socket = NULL;
+		$socket = null;
 		if ($port)
 		{
 			if (is_numeric($port))
@@ -61,7 +61,7 @@ class mysqli extends \phpbb\db\driver\mysql_base
 			else
 			{
 				$socket = $port;
-				$port = NULL;
+				$port = null;
 			}
 		}
 
diff --git a/phpBB/phpbb/db/driver/postgres.php b/phpBB/phpbb/db/driver/postgres.php
index 9cbb1ecb07..5cd6578d87 100644
--- a/phpBB/phpbb/db/driver/postgres.php
+++ b/phpBB/phpbb/db/driver/postgres.php
@@ -328,7 +328,7 @@ class postgres extends \phpbb\db\driver\driver
 					return false;
 				}
 
-				$temp_result = @pg_fetch_assoc($temp_q_id, NULL);
+				$temp_result = @pg_fetch_assoc($temp_q_id, null);
 				@pg_free_result($query_id);
 
 				return ($temp_result) ? $temp_result['last_value'] : false;
@@ -456,7 +456,7 @@ class postgres extends \phpbb\db\driver\driver
 
 					if ($result = @pg_query($this->db_connect_id, "EXPLAIN $explain_query"))
 					{
-						while ($row = @pg_fetch_assoc($result, NULL))
+						while ($row = @pg_fetch_assoc($result, null))
 						{
 							$html_table = $this->sql_report('add_select_row', $query, $html_table, $row);
 						}
@@ -476,7 +476,7 @@ class postgres extends \phpbb\db\driver\driver
 				$endtime = $endtime[0] + $endtime[1];
 
 				$result = @pg_query($this->db_connect_id, $query);
-				while ($void = @pg_fetch_assoc($result, NULL))
+				while ($void = @pg_fetch_assoc($result, null))
 				{
 					// Take the time spent on parsing rows into account
 				}