diff --git a/admin/index.php b/admin/index.php
index c47ac1d6..573f634e 100644
--- a/admin/index.php
+++ b/admin/index.php
@@ -2,8 +2,8 @@
 // few things we'll need
 require '../common.php';
 
-define('ADMIN_PANEL', true);
-define('MYAAC_ADMIN', true);
+const ADMIN_PANEL = true;
+const MYAAC_ADMIN = true;
 
 if(file_exists(BASE . 'config.local.php')) {
 	require_once BASE . 'config.local.php';
@@ -18,7 +18,7 @@ if(file_exists(BASE . 'install') && (!isset($config['installed']) || !$config['i
 $content = '';
 
 // validate page
-$page = isset($_GET['p']) ? $_GET['p'] : '';
+$page = $_GET['p'] ?? '';
 if(empty($page) || preg_match("/[^a-zA-Z0-9_\-]/", $page))
 	$page = 'dashboard';
 
@@ -52,6 +52,9 @@ if(!$logged || !admin()) {
 	$page = 'login';
 }
 
+// more pages have action, lets define it here
+$action = $_REQUEST['action'] ?? '';
+
 // include our page
 $file = SYSTEM . 'pages/admin/' . $page . '.php';
 if(!@file_exists($file)) {
@@ -68,4 +71,3 @@ ob_end_clean();
 // template
 $template_path = 'template/';
 require ADMIN . $template_path . 'template.php';
-?>
diff --git a/system/pages/admin/changelog.php b/system/pages/admin/changelog.php
index a6e7d01c..414a38e1 100644
--- a/system/pages/admin/changelog.php
+++ b/system/pages/admin/changelog.php
@@ -17,13 +17,13 @@ if (!hasFlag(FLAG_CONTENT_PAGES) && !superAdmin()) {
 
 $title = 'Changelog';
 $use_datatable = true;
-define('CL_LIMIT', 600); // maximum changelog body length
+const CL_LIMIT = 600; // maximum changelog body length
 ?>
 
 <link rel="stylesheet" type="text/css" href="<?php echo BASE_URL; ?>tools/css/jquery.datetimepicker.css"/ >
 <script src="<?php echo BASE_URL; ?>tools/js/jquery.datetimepicker.js"></script>
 <?php
-$id = isset($_GET['id']) ? $_GET['id'] : 0;
+$id = $_GET['id'] ?? 0;
 require_once LIBS . 'changelog.php';
 
 if(!empty($action))
@@ -111,14 +111,13 @@ if($action == 'edit' || $action == 'new') {
 	$twig->display('admin.changelog.form.html.twig', array(
 		'action' => $action,
 		'cl_link_form' => constant('ADMIN_URL').'?p=changelog&action=' . ($action == 'edit' ? 'edit' : 'add'),
-		'cl_id' => isset($id) ? $id : null,
+		'cl_id' => $id ?? null,
 		'body' => isset($body) ? htmlentities($body, ENT_COMPAT, 'UTF-8') : '',
-		'create_date' => isset($create_date) ? $create_date : '',
-		'player' => isset($player) && $player->isLoaded() ? $player : null,
-		'player_id' => isset($player_id) ? $player_id : null,
+		'create_date' => $create_date ?? '',
+		'player_id' => $player_id ?? null,
 		'account_players' => $account_players,
-		'type' => isset($type) ? $type : 0,
-		'where' => isset($where) ? $where : 0,
+		'type' => $type ?? 0,
+		'where' => $where ?? 0,
 		'log_type' => $log_type,
 		'log_where' => $log_where,
 	));
diff --git a/system/pages/admin/login.php b/system/pages/admin/login.php
index 2c6d4e9f..03ccfe2b 100644
--- a/system/pages/admin/login.php
+++ b/system/pages/admin/login.php
@@ -10,8 +10,8 @@
 defined('MYAAC') or die('Direct access not allowed!');
 $title = 'Login';
 
-$twig->display('admin.login.html.twig', array(
-	'logout' => ($action == 'logout' ? 'You have  been logged out!'  : ''),
+$twig->display('admin.login.html.twig', [
+	'logout' => (ACTION == 'logout' ? 'You have  been logged out!'  : ''),
 	'account' => USE_ACCOUNT_NAME ? 'Name' : 'Number',
-	'errors' => isset($errors)? $errors : ''
-));
+	'errors' => $errors ?? ''
+]);
diff --git a/system/pages/changelog.php b/system/pages/changelog.php
index 541f9088..dddabf8d 100644
--- a/system/pages/changelog.php
+++ b/system/pages/changelog.php
@@ -10,8 +10,8 @@
 defined('MYAAC') or die('Direct access not allowed!');
 $title = 'Changelog';
 
-$_page = isset($_GET['page']) ? $_GET['page'] : 0;
-$id = isset($_GET['id']) ? $_GET['id'] : 0;
+$_page = $_GET['page'] ?? 0;
+$id = $_GET['id'] ?? 0;
 $limit = 30;
 $offset = $_page * $limit;
 $next_page = false;
@@ -43,4 +43,3 @@ $twig->display('changelog.html.twig', array(
 	'next_page' => $next_page,
 	'canEdit' => $canEdit,
 ));
-?>
diff --git a/system/router.php b/system/router.php
index 8117cdaf..c2c8e268 100644
--- a/system/router.php
+++ b/system/router.php
@@ -41,7 +41,7 @@ if($success) {
 	$page = $uri;
 } else {
 	// old support for pages like /?subtopic=accountmanagement
-	$page = isset($_REQUEST['p']) ? $_REQUEST['p'] : (isset($_REQUEST['subtopic']) ? $_REQUEST['subtopic'] : '');
+	$page = $_REQUEST['p'] ?? ($_REQUEST['subtopic'] ?? '');
 	if(!empty($page) && preg_match('/^[A-z0-9\-]+$/', $page)) {
 		if(config('backward_support')) {
 			require SYSTEM . 'compat_pages.php';