diff --git a/phpBB/includes/acp/acp_users.php b/phpBB/includes/acp/acp_users.php
index db429e4f36d..75b1cde0d81 100644
--- a/phpBB/includes/acp/acp_users.php
+++ b/phpBB/includes/acp/acp_users.php
@@ -1094,7 +1094,7 @@ function main($id, $mode)
 					$s_action_options .= '<option value="' . $value . '">' . $user->lang['USER_ADMIN_' . $lang] . '</option>';
 				}
 
-				$last_active = (!empty($user_row['session_time'])) ? $user_row['session_time'] : $user_row['user_last_active'];
+				$last_active = $user_row['user_last_active'] ?: ($user_row['session_time'] ?? 0);
 
 				$inactive_reason = '';
 				if ($user_row['user_type'] == USER_INACTIVE)
diff --git a/phpBB/includes/functions_display.php b/phpBB/includes/functions_display.php
index 67affce13d2..7a4e70f944f 100644
--- a/phpBB/includes/functions_display.php
+++ b/phpBB/includes/functions_display.php
@@ -1595,7 +1595,7 @@ function phpbb_show_profile($data, $user_notes_enabled = false, $warn_user_enabl
 
 	if ($data['user_allow_viewonline'] || $auth->acl_get('u_viewonline'))
 	{
-		$last_active = (!empty($data['session_time'])) ? $data['session_time'] : $data['user_last_active'];
+		$last_active = $data['user_last_active'] ?: ($data['session_time'] ?? 0);
 	}
 	else
 	{
diff --git a/phpBB/memberlist.php b/phpBB/memberlist.php
index ea7fd03afed..7521cca1df1 100644
--- a/phpBB/memberlist.php
+++ b/phpBB/memberlist.php
@@ -1724,7 +1724,7 @@
 			{
 				$row['session_time'] = $session_ary[$row['user_id']]['session_time'] ?? 0;
 				$row['session_viewonline'] = $session_ary[$row['user_id']]['session_viewonline'] ?? 0;
-				$row['last_visit'] = (!empty($row['session_time'])) ? $row['session_time'] : $row['user_last_active'];
+				$row['last_visit'] = $row['user_last_active'] ?: $row['session_time'];
 
 				$id_cache[$row['user_id']] = $row;
 			}
diff --git a/phpBB/phpbb/session.php b/phpBB/phpbb/session.php
index 5cfe3d91f34..1e5d0c4f171 100644
--- a/phpBB/phpbb/session.php
+++ b/phpBB/phpbb/session.php
@@ -451,7 +451,7 @@ function session_begin($update_session_page = true)
 						$this->check_ban_for_current_session($config);
 
 						// Update user last active time accordingly, but in a minute or so
-						if ((int) $this->data['session_time'] - (int) $this->data['user_last_active'] > 60)
+						if ($this->time_now - (int) $this->data['user_last_active'] > 60)
 						{
 							$this->update_last_active_time();
 						}
@@ -1718,7 +1718,7 @@ public function update_user_lastvisit()
 		{
 			$sql = 'UPDATE ' . USERS_TABLE . '
 				SET user_lastvisit = ' . (int) $this->data['session_time'] . ',
-					user_last_active = ' . (int) $this->data['session_time'] . '
+					user_last_active = ' . $this->time_now . '
 				WHERE user_id = ' . (int) $this->data['user_id'];
 			$db->sql_query($sql);
 		}
@@ -1733,10 +1733,10 @@ public function update_last_active_time()
 	{
 		global $db;
 
-		if (isset($this->data['session_time'], $this->data['user_id']))
+		if (isset($this->time_now, $this->data['user_id']))
 		{
 			$sql = 'UPDATE ' . USERS_TABLE . '
-				SET user_last_active = ' . (int) $this->data['session_time'] . '
+				SET user_last_active = ' . $this->time_now . '
 				WHERE user_id = ' . (int) $this->data['user_id'];
 			$db->sql_query($sql);
 		}