Fix PHP warnings and notices

lib.php

@@ -26,6 +26,7 @@ $smarty = new Smarty();
 $smarty->template_dir = 'tpl';
 $smarty->compile_dir = 'tpl_c';
 $smarty->registerPlugin('function', 'treelist', 'print_tree');
-$smarty->assign("suser_tooltips", $_SESSION['suser_tooltips']);
+
+$smarty->assign("suser_tooltips", $_SESSION['suser_tooltips'] ?? 'off');
 
 ?>

lib/functions.php

@@ -141,7 +141,8 @@ function print_tree_rec($tree, $level) {
     return $output;
 }
 
-function print_tree($params, &$smarty) {
+//function print_tree($params, &$smarty) {
+function print_tree($params, Smarty_Internal_Template $template) {
     if (empty($params['level'])) {
         $level = 0;
     } else {

node.php

@@ -15,7 +15,8 @@ if(isset($_GET['subnet_id'])) {
     $subnet_view = "WHERE node.subnet_id=" . $subnet_id;
     $smarty->assign("subnet_id", $subnet_id);
 } else {
-    $smarty->assign("subnet_id", "");
+    $smarty->assign("subnet_id", '');
+    $subnet_view = '';
 }
 
 $query = "SELECT

tpl/node.tpl

@@ -2,7 +2,7 @@
 <tr>
     <td class="header">
         <img class="icon" src="images/network-ethernet.png" alt="" />
-        {$lang_nodes} ({$node|@count})
+        {$lang_nodes} ({$nodes|@count})
     </td>
     <td align="right">
         <a href="nodeadd.php?subnet_id={$subnet_id}"><img src="image.php?icon=add" alt="{$lang_node_add}"></a>