diff --git a/src/Module/BaseNotifications.php b/src/Module/BaseNotifications.php
index feec56aea..f1321dfec 100644
--- a/src/Module/BaseNotifications.php
+++ b/src/Module/BaseNotifications.php
@@ -46,12 +46,12 @@ abstract class BaseNotifications extends BaseModule
 	];
 
 	/** @var int The default count of items per page */
-	const PER_PAGE = 20;
+	const ITEMS_PER_PAGE = 20;
 
 	/** @var boolean True, if ALL entries should get shown */
-	protected static $show;
+	protected static $showAll;
 	/** @var int The determined start item of the current page */
-	protected static $start;
+	protected static $firstItemNum;
 
 	/**
 	 * Collects all notifies from the backend
@@ -69,8 +69,8 @@ abstract class BaseNotifications extends BaseModule
 
 		$page = ($_REQUEST['page'] ?? 0) ?: 1;
 
-		self::$start = ($page * self::PER_PAGE) - self::PER_PAGE;
-		self::$show  = ($_REQUEST['show'] ?? '') === 'all';
+		self::$firstItemNum = ($page * self::ITEMS_PER_PAGE) - self::ITEMS_PER_PAGE;
+		self::$showAll      = ($_REQUEST['show'] ?? '') === 'all';
 	}
 
 	public static function post(array $parameters = [])
@@ -125,7 +125,7 @@ abstract class BaseNotifications extends BaseModule
 		$tabs = self::getTabs();
 
 		// Set the pager
-		$pager = new Pager(DI::args()->getQueryString(), self::PER_PAGE);
+		$pager = new Pager(DI::args()->getQueryString(), self::ITEMS_PER_PAGE);
 
 		$notif_tpl = Renderer::getMarkupTemplate('notifications.tpl');
 		return Renderer::replaceMacros($notif_tpl, [
diff --git a/src/Module/Notifications/Introductions.php b/src/Module/Notifications/Introductions.php
index 7de182036..b22df920b 100644
--- a/src/Module/Notifications/Introductions.php
+++ b/src/Module/Notifications/Introductions.php
@@ -23,7 +23,7 @@ class Introductions extends BaseNotifications
 		$id  = (int)DI::args()->get(2, 0);
 		$all = DI::args()->get(2) == 'all';
 
-		$notifs = DI::notify()->getIntroList($all, self::$start, self::PER_PAGE, $id);
+		$notifs = DI::notify()->getIntroList($all, self::$firstItemNum, self::ITEMS_PER_PAGE, $id);
 
 		return [
 			'header' => DI::l10n()->t('Notifications'),
diff --git a/src/Module/Notifications/Notifications.php b/src/Module/Notifications/Notifications.php
index b15c7feca..50995645c 100644
--- a/src/Module/Notifications/Notifications.php
+++ b/src/Module/Notifications/Notifications.php
@@ -29,29 +29,29 @@ class Notifications extends BaseNotifications
 		// Get the network notifications
 		if ((DI::args()->get(1) == 'network')) {
 			$notif_header = DI::l10n()->t('Network Notifications');
-			$notifs       = $nm->getNetworkList(self::$show, self::$start, self::PER_PAGE);
+			$notifs       = $nm->getNetworkList(self::$showAll, self::$firstItemNum, self::ITEMS_PER_PAGE);
 
 			// Get the system notifications
 		} elseif ((DI::args()->get(1) == 'system')) {
 			$notif_header = DI::l10n()->t('System Notifications');
-			$notifs       = $nm->getSystemList(self::$show, self::$start, self::PER_PAGE);
+			$notifs       = $nm->getSystemList(self::$showAll, self::$firstItemNum, self::ITEMS_PER_PAGE);
 
 			// Get the personal notifications
 		} elseif ((DI::args()->get(1) == 'personal')) {
 			$notif_header = DI::l10n()->t('Personal Notifications');
-			$notifs       = $nm->getPersonalList(self::$show, self::$start, self::PER_PAGE);
+			$notifs       = $nm->getPersonalList(self::$showAll, self::$firstItemNum, self::ITEMS_PER_PAGE);
 
 			// Get the home notifications
 		} elseif ((DI::args()->get(1) == 'home')) {
 			$notif_header = DI::l10n()->t('Home Notifications');
-			$notifs       = $nm->getHomeList(self::$show, self::$start, self::PER_PAGE);
+			$notifs       = $nm->getHomeList(self::$showAll, self::$firstItemNum, self::ITEMS_PER_PAGE);
 			// fallback - redirect to main page
 		} else {
 			DI::baseUrl()->redirect('notifications');
 		}
 
 		// Set the pager
-		$pager = new Pager(DI::args()->getQueryString(), self::PER_PAGE);
+		$pager = new Pager(DI::args()->getQueryString(), self::ITEMS_PER_PAGE);
 
 		// Add additional informations (needed for json output)
 		$notifs['items_page'] = $pager->getItemsPerPage();
@@ -109,8 +109,8 @@ class Notifications extends BaseNotifications
 		}
 
 		$notif_show_lnk = [
-			'href' => (self::$show ? 'notifications/' . $notifs['ident'] : 'notifications/' . $notifs['ident'] . '?show=all'),
-			'text' => (self::$show ? DI::l10n()->t('Show unread') : DI::l10n()->t('Show all')),
+			'href' => (self::$showAll ? 'notifications/' . $notifs['ident'] : 'notifications/' . $notifs['ident'] . '?show=all'),
+			'text' => (self::$showAll ? DI::l10n()->t('Show unread') : DI::l10n()->t('Show all')),
 		];
 
 		return self::printContent($notif_header, $notif_content, $notif_nocontent, $notif_show_lnk);