Minor optimizations with ternary operators

Author: Ayesh

.router.php

@@ -1,7 +1,7 @@
 <?php
 $_SERVER["SERVER_ADDR"] = $_SERVER["HTTP_HOST"];
 
-$filename = isset($_SERVER["PATH_INFO"]) ? $_SERVER["PATH_INFO"] : $_SERVER["SCRIPT_NAME"];
+$filename = $_SERVER["PATH_INFO"] ?? $_SERVER["SCRIPT_NAME"];
 
 if (file_exists($_SERVER["DOCUMENT_ROOT"] . $filename)) {
     /* This could be an image or whatever, so don't try to compress it */

images/logo.php

@@ -1,6 +1,6 @@
 <?php
 
-$refresh = isset($_GET['refresh']) ? true : false;
+$refresh = isset($_GET['refresh']);
 
 // Be 100% sure the timezone is set
 if (ini_get('date.timezone') === '' && function_exists('date_default_timezone_set')) {