Handle undefined PATH_INFO value

Author: billz

includes/page_actions.php

@@ -4,7 +4,7 @@
 
 // Get the requested page
 $extraFooterScripts = array();
-$page = $_SERVER['PATH_INFO'];
+$page = $_SERVER['PATH_INFO'] ?? '';
 
 // Check if any plugin wants to handle the request
 if (!$pluginManager->handlePageAction($page)) {

plugins

@@ -76,8 +76,10 @@ public function getSidebar(): Sidebar
      * Iterates over registered plugins and calls its associated method
      * @param string $page
      */
-    public function handlePageAction(string $page): bool
+    public function handlePageAction(?string $page): bool
     {
+        $page = $page ?? '';
+
         foreach ($this->getInstalledPlugins() as $pluginClass) {
             $plugin = new $pluginClass($this->pluginPath, $pluginClass);