diff --git a/plugins/dynamix.docker.manager/include/CreateDocker.php b/plugins/dynamix.docker.manager/include/CreateDocker.php
index 65c2e4d4d..e83470f03 100644
--- a/plugins/dynamix.docker.manager/include/CreateDocker.php
+++ b/plugins/dynamix.docker.manager/include/CreateDocker.php
@@ -13,7 +13,7 @@
  */
 ?>
 <?
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 $var     = parse_ini_file('state/var.ini');
 
 ignore_user_abort(true);
diff --git a/plugins/dynamix.docker.manager/include/DockerClient.php b/plugins/dynamix.docker.manager/include/DockerClient.php
index 2c6019040..78efbabbb 100644
--- a/plugins/dynamix.docker.manager/include/DockerClient.php
+++ b/plugins/dynamix.docker.manager/include/DockerClient.php
@@ -11,7 +11,7 @@
  */
 ?>
 <?
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 
 $dockerManPaths = [
 	'plugin'            => '/usr/local/emhttp/plugins/dynamix.docker.manager',
diff --git a/plugins/dynamix.docker.manager/include/Events.php b/plugins/dynamix.docker.manager/include/Events.php
index 11eeb8591..3338fa8bb 100644
--- a/plugins/dynamix.docker.manager/include/Events.php
+++ b/plugins/dynamix.docker.manager/include/Events.php
@@ -11,7 +11,7 @@
  */
 ?>
 <?
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 
 require_once "$docroot/plugins/dynamix.docker.manager/include/DockerClient.php";
 
diff --git a/plugins/dynamix.docker.manager/include/Exec.php b/plugins/dynamix.docker.manager/include/Exec.php
index 70f25cf26..7e346f882 100644
--- a/plugins/dynamix.docker.manager/include/Exec.php
+++ b/plugins/dynamix.docker.manager/include/Exec.php
@@ -11,7 +11,7 @@
  */
 ?>
 <?
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 
 if ( isset( $_GET['cmd'] )) {
   $command = rawurldecode(($_GET['cmd']));
diff --git a/plugins/dynamix.docker.manager/include/UpdateConfig.php b/plugins/dynamix.docker.manager/include/UpdateConfig.php
index 0d36706d1..57ef3bda1 100644
--- a/plugins/dynamix.docker.manager/include/UpdateConfig.php
+++ b/plugins/dynamix.docker.manager/include/UpdateConfig.php
@@ -11,7 +11,7 @@
  */
 ?>
 <?
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 require_once "$docroot/plugins/dynamix.docker.manager/include/DockerClient.php";
 
 // Autostart file
diff --git a/plugins/dynamix.docker.manager/scripts/dockerupdate.php b/plugins/dynamix.docker.manager/scripts/dockerupdate.php
index a5213723f..297460823 100755
--- a/plugins/dynamix.docker.manager/scripts/dockerupdate.php
+++ b/plugins/dynamix.docker.manager/scripts/dockerupdate.php
@@ -12,7 +12,7 @@
  */
 ?>
 <?
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 
 exec("pgrep docker", $pid);
 if (count($pid) == 1) exit(0);
diff --git a/plugins/dynamix.plugin.manager/include/PluginHelpers.php b/plugins/dynamix.plugin.manager/include/PluginHelpers.php
index 2539351de..b36a551c7 100644
--- a/plugins/dynamix.plugin.manager/include/PluginHelpers.php
+++ b/plugins/dynamix.plugin.manager/include/PluginHelpers.php
@@ -11,7 +11,7 @@
  */
 ?>
 <?
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 
 // Invoke the plugin command with indicated method
 function plugin($method, $arg = '') {
diff --git a/plugins/dynamix.plugin.manager/include/ShowChanges.php b/plugins/dynamix.plugin.manager/include/ShowChanges.php
index 6c9ad1d30..3ac5aa6f8 100644
--- a/plugins/dynamix.plugin.manager/include/ShowChanges.php
+++ b/plugins/dynamix.plugin.manager/include/ShowChanges.php
@@ -11,7 +11,7 @@
  */
 ?>
 <?
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 require_once "$docroot/webGui/include/Markdown.php";
 ?>
 <!DOCTYPE HTML>
diff --git a/plugins/dynamix.plugin.manager/include/ShowPlugins.php b/plugins/dynamix.plugin.manager/include/ShowPlugins.php
index c1298a669..5747939de 100644
--- a/plugins/dynamix.plugin.manager/include/ShowPlugins.php
+++ b/plugins/dynamix.plugin.manager/include/ShowPlugins.php
@@ -11,7 +11,7 @@
  */
 ?>
 <?
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 require_once "$docroot/webGui/include/Markdown.php";
 require_once "$docroot/plugins/dynamix.plugin.manager/include/PluginHelpers.php";
 
diff --git a/plugins/dynamix.plugin.manager/scripts/plugincheck b/plugins/dynamix.plugin.manager/scripts/plugincheck
index dcce02a95..b859b62ae 100755
--- a/plugins/dynamix.plugin.manager/scripts/plugincheck
+++ b/plugins/dynamix.plugin.manager/scripts/plugincheck
@@ -12,7 +12,7 @@
  */
 ?>
 <?
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 require_once "$docroot/webGui/include/Wrappers.php";
 require_once "$docroot/plugins/dynamix.plugin.manager/include/PluginHelpers.php";
 
diff --git a/plugins/dynamix.plugin.manager/scripts/unraidcheck b/plugins/dynamix.plugin.manager/scripts/unraidcheck
index 3ce971d18..e15b9c308 100755
--- a/plugins/dynamix.plugin.manager/scripts/unraidcheck
+++ b/plugins/dynamix.plugin.manager/scripts/unraidcheck
@@ -12,7 +12,7 @@
  */
 ?>
 <?
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 require_once "$docroot/webGui/include/Wrappers.php";
 require_once "$docroot/plugins/dynamix.plugin.manager/include/PluginHelpers.php";
 
diff --git a/plugins/dynamix.vm.manager/VMMachines.page b/plugins/dynamix.vm.manager/VMMachines.page
index 1a72487bb..b3fb54d9d 100644
--- a/plugins/dynamix.vm.manager/VMMachines.page
+++ b/plugins/dynamix.vm.manager/VMMachines.page
@@ -16,7 +16,7 @@ Cond="(pgrep('libvirtd')!==false)"
  */
 ?>
 <?
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 require_once "$docroot/plugins/dynamix.vm.manager/classes/libvirt_helpers.php";
 
 exec('cat /sys/devices/system/cpu/*/topology/thread_siblings_list|sort -nu', $cpus);
diff --git a/plugins/dynamix.vm.manager/VMajax.php b/plugins/dynamix.vm.manager/VMajax.php
index b3dbc7236..eca02543c 100644
--- a/plugins/dynamix.vm.manager/VMajax.php
+++ b/plugins/dynamix.vm.manager/VMajax.php
@@ -11,7 +11,7 @@
  */
 ?>
 <?
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 require_once "$docroot/webGui/include/Helpers.php";
 require_once "$docroot/plugins/dynamix.vm.manager/classes/libvirt.php";
 require_once "$docroot/plugins/dynamix.vm.manager/classes/libvirt_helpers.php";
diff --git a/plugins/dynamix.vm.manager/VMedit.php b/plugins/dynamix.vm.manager/VMedit.php
index d24cb0017..a54821d07 100644
--- a/plugins/dynamix.vm.manager/VMedit.php
+++ b/plugins/dynamix.vm.manager/VMedit.php
@@ -11,7 +11,7 @@
  */
 ?>
 <?
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 require_once "$docroot/webGui/include/Helpers.php";
 require_once "$docroot/plugins/dynamix.vm.manager/classes/libvirt.php";
 require_once "$docroot/plugins/dynamix.vm.manager/classes/libvirt_helpers.php";
diff --git a/plugins/dynamix.vm.manager/classes/libvirt_helpers.php b/plugins/dynamix.vm.manager/classes/libvirt_helpers.php
index e74f3c866..1077ef74f 100644
--- a/plugins/dynamix.vm.manager/classes/libvirt_helpers.php
+++ b/plugins/dynamix.vm.manager/classes/libvirt_helpers.php
@@ -11,7 +11,7 @@
  */
 ?>
 <?
-	$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+	$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 
 	// Load emhttp variables if needed.
 	if (!isset($var)){
diff --git a/plugins/dynamix.vm.manager/templates/Custom.form.php b/plugins/dynamix.vm.manager/templates/Custom.form.php
index 528f0baa8..a2150a02d 100644
--- a/plugins/dynamix.vm.manager/templates/Custom.form.php
+++ b/plugins/dynamix.vm.manager/templates/Custom.form.php
@@ -11,7 +11,7 @@
  */
 ?>
 <?
-	$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+	$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 	require_once "$docroot/webGui/include/Helpers.php";
 	require_once "$docroot/plugins/dynamix.vm.manager/classes/libvirt.php";
 	require_once "$docroot/plugins/dynamix.vm.manager/classes/libvirt_helpers.php";
diff --git a/plugins/dynamix.vm.manager/templates/LibreELEC.form.php b/plugins/dynamix.vm.manager/templates/LibreELEC.form.php
index f80927a1d..50dbcdf9a 100644
--- a/plugins/dynamix.vm.manager/templates/LibreELEC.form.php
+++ b/plugins/dynamix.vm.manager/templates/LibreELEC.form.php
@@ -11,7 +11,7 @@
  */
 ?>
 <?
-	$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+	$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 	require_once "$docroot/webGui/include/Helpers.php";
 	require_once "$docroot/plugins/dynamix.vm.manager/classes/libvirt.php";
 	require_once "$docroot/plugins/dynamix.vm.manager/classes/libvirt_helpers.php";
diff --git a/plugins/dynamix.vm.manager/templates/OpenELEC.form.php b/plugins/dynamix.vm.manager/templates/OpenELEC.form.php
index 081767e5c..d86077faf 100644
--- a/plugins/dynamix.vm.manager/templates/OpenELEC.form.php
+++ b/plugins/dynamix.vm.manager/templates/OpenELEC.form.php
@@ -11,7 +11,7 @@
  */
 ?>
 <?
-	$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+	$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 	require_once "$docroot/webGui/include/Helpers.php";
 	require_once "$docroot/plugins/dynamix.vm.manager/classes/libvirt.php";
 	require_once "$docroot/plugins/dynamix.vm.manager/classes/libvirt_helpers.php";
diff --git a/plugins/dynamix.vm.manager/templates/XML_Expert.form.php b/plugins/dynamix.vm.manager/templates/XML_Expert.form.php
index 02ad69993..90875dc84 100644
--- a/plugins/dynamix.vm.manager/templates/XML_Expert.form.php
+++ b/plugins/dynamix.vm.manager/templates/XML_Expert.form.php
@@ -11,7 +11,7 @@
  */
 ?>
 <?
-	$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+	$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 	require_once "$docroot/webGui/include/Helpers.php";
 	require_once "$docroot/plugins/dynamix.vm.manager/classes/libvirt.php";
 	require_once "$docroot/plugins/dynamix.vm.manager/classes/libvirt_helpers.php";
diff --git a/plugins/dynamix/include/Browse.php b/plugins/dynamix/include/Browse.php
index d2cc9d50a..064aabc24 100644
--- a/plugins/dynamix/include/Browse.php
+++ b/plugins/dynamix/include/Browse.php
@@ -11,7 +11,7 @@
  */
 ?>
 <?
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 require_once "$docroot/webGui/include/Helpers.php";
 
 function parent_link() {
diff --git a/plugins/dynamix/include/DashUpdate.php b/plugins/dynamix/include/DashUpdate.php
index 8551b8ea5..ea92fa44c 100644
--- a/plugins/dynamix/include/DashUpdate.php
+++ b/plugins/dynamix/include/DashUpdate.php
@@ -11,7 +11,7 @@
  */
 ?>
 <?
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 require_once "$docroot/webGui/include/Wrappers.php";
 
 function normalize($type,$count) {
diff --git a/plugins/dynamix/include/DeleteLogFile.php b/plugins/dynamix/include/DeleteLogFile.php
index f4ca94f42..a3c1d4b19 100644
--- a/plugins/dynamix/include/DeleteLogFile.php
+++ b/plugins/dynamix/include/DeleteLogFile.php
@@ -11,7 +11,7 @@
  */
 ?>
 <?
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 require_once "$docroot/webGui/include/Wrappers.php";
 
 $dynamix = parse_plugin_cfg('dynamix',true);
diff --git a/plugins/dynamix/include/DeviceList.php b/plugins/dynamix/include/DeviceList.php
index 07cb3615d..19f9b7123 100644
--- a/plugins/dynamix/include/DeviceList.php
+++ b/plugins/dynamix/include/DeviceList.php
@@ -11,7 +11,7 @@
  */
 ?>
 <?
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 require_once "$docroot/webGui/include/Helpers.php";
 
 $path  = $_POST['path'];
@@ -129,17 +129,17 @@ function fs_info(&$disk) {
     return;
   } elseif ($disk['fsStatus']=='Mounted') {
     echo "<td>".vfs_type($disk['fsType'])."</td>";
-    echo "<td>".my_scale($disk['fsSize']*1024,$unit,-1)." $unit</td>";
+    echo "<td>".my_scale(($disk['fsSize']??0)*1024,$unit,-1)." $unit</td>";
     if ($display['text']%10==0) {
       echo "<td>".my_scale($disk['fsUsed']*1024,$unit)." $unit</td>";
     } else {
-      $used = $disk['fsSize'] ? 100-round(100*$disk['fsFree']/$disk['fsSize']) : 0;
+      $used = isset($disk['fsSize']) && $disk['fsSize']>0 ? 100-round(100*$disk['fsFree']/$disk['fsSize']) : 0;
       echo "<td><div class='usage-disk'><span style='margin:0;width:$used%' class='".usage_color($disk,$used,false)."'><span>".my_scale($disk['fsUsed']*1024,$unit)." $unit</span></span></div></td>";
     }
     if ($display['text']<10 ? $display['text']%10==0 : $display['text']%10!=0) {
       echo "<td>".my_scale($disk['fsFree']*1024,$unit)." $unit</td>";
     } else {
-      $free = $disk['fsSize'] ? round(100*$disk['fsFree']/$disk['fsSize']) : 0;
+      $free = isset($disk['fsSize']) && $disk['fsSize']>0 ? round(100*$disk['fsFree']/$disk['fsSize']) : 0;
       echo "<td><div class='usage-disk'><span style='margin:0;width:$free%' class='".usage_color($disk,$free,true)."'><span>".my_scale($disk['fsFree']*1024,$unit)." $unit</span></span></div></td>";
     }
     echo "<td>".device_browse($disk)."</td>";
diff --git a/plugins/dynamix/include/DiskList.php b/plugins/dynamix/include/DiskList.php
index 217ae7ecd..eea877037 100644
--- a/plugins/dynamix/include/DiskList.php
+++ b/plugins/dynamix/include/DiskList.php
@@ -11,7 +11,7 @@
  */
 ?>
 <?
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 require_once "$docroot/webGui/include/Helpers.php";
 
 $shares  = parse_ini_file('state/shares.ini',true);
diff --git a/plugins/dynamix/include/Download.php b/plugins/dynamix/include/Download.php
index a63e04de8..61f286d08 100644
--- a/plugins/dynamix/include/Download.php
+++ b/plugins/dynamix/include/Download.php
@@ -11,7 +11,7 @@
  */
 ?>
 <?
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 $file = $_POST['file'];
 switch ($_POST['cmd']) {
 case 'save':
diff --git a/plugins/dynamix/include/Feedback.php b/plugins/dynamix/include/Feedback.php
index 2ae23fbcb..ee6e4942d 100644
--- a/plugins/dynamix/include/Feedback.php
+++ b/plugins/dynamix/include/Feedback.php
@@ -10,7 +10,7 @@
  */
 ?>
 <?
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 $var = parse_ini_file('state/var.ini');
 $unraid = parse_ini_file('/etc/unraid-version');
 $keyfile = trim(base64_encode(@file_get_contents($var['regFILE'])));
diff --git a/plugins/dynamix/include/Helpers.php b/plugins/dynamix/include/Helpers.php
index 7f6d36c32..db7f3cfee 100644
--- a/plugins/dynamix/include/Helpers.php
+++ b/plugins/dynamix/include/Helpers.php
@@ -11,7 +11,7 @@
  */
 ?>
 <?
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 require_once "$docroot/webGui/include/Wrappers.php";
 
 // Helper functions
diff --git a/plugins/dynamix/include/InstallKey.php b/plugins/dynamix/include/InstallKey.php
index 10295f09c..b9f2563ab 100644
--- a/plugins/dynamix/include/InstallKey.php
+++ b/plugins/dynamix/include/InstallKey.php
@@ -10,7 +10,7 @@
  */
 ?>
 <?
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 
 function addLog($line) { echo "<script>addLog('$line');</script>"; }
 
diff --git a/plugins/dynamix/include/NotificationsArchive.php b/plugins/dynamix/include/NotificationsArchive.php
index d6c617dfd..7d3de871b 100644
--- a/plugins/dynamix/include/NotificationsArchive.php
+++ b/plugins/dynamix/include/NotificationsArchive.php
@@ -11,7 +11,7 @@
  */
 ?>
 <?
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 require_once "$docroot/webGui/include/Wrappers.php";
 
 $dynamix = parse_plugin_cfg('dynamix',true);
diff --git a/plugins/dynamix/include/Notify.php b/plugins/dynamix/include/Notify.php
index 0b92eaa69..0155d2bb0 100644
--- a/plugins/dynamix/include/Notify.php
+++ b/plugins/dynamix/include/Notify.php
@@ -12,7 +12,7 @@
  */
 ?>
 <?
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 $notify  = "$docroot/webGui/scripts/notify";
 
 switch ($_POST['cmd']) {
diff --git a/plugins/dynamix/include/SMTPtest.php b/plugins/dynamix/include/SMTPtest.php
index 3229369a1..89f9a2472 100644
--- a/plugins/dynamix/include/SMTPtest.php
+++ b/plugins/dynamix/include/SMTPtest.php
@@ -11,7 +11,7 @@
  */
 ?>
 <?
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 
 function PsExecute($command, $timeout = 20, $sleep = 2) {
   exec($command.'>/dev/null & echo $!',$op);
diff --git a/plugins/dynamix/include/ShareList.php b/plugins/dynamix/include/ShareList.php
index a8d3eb14e..4cdc39d43 100644
--- a/plugins/dynamix/include/ShareList.php
+++ b/plugins/dynamix/include/ShareList.php
@@ -11,7 +11,7 @@
  */
 ?>
 <?
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 require_once "$docroot/webGui/include/Helpers.php";
 
 $shares  = parse_ini_file('state/shares.ini',true);
diff --git a/plugins/dynamix/include/SmartInfo.php b/plugins/dynamix/include/SmartInfo.php
index 0c41cbb4c..cca25c315 100644
--- a/plugins/dynamix/include/SmartInfo.php
+++ b/plugins/dynamix/include/SmartInfo.php
@@ -12,7 +12,7 @@
 ?>
 <?
 $disks = []; $var = [];
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 require_once "$docroot/webGui/include/CustomMerge.php";
 require_once "$docroot/webGui/include/Wrappers.php";
 require_once "$docroot/webGui/include/Preselect.php";
diff --git a/plugins/dynamix/include/Wrappers.php b/plugins/dynamix/include/Wrappers.php
index 498b44060..f2859ef3d 100644
--- a/plugins/dynamix/include/Wrappers.php
+++ b/plugins/dynamix/include/Wrappers.php
@@ -11,7 +11,7 @@
  */
 ?>
 <?
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 
 // Wrapper functions
 function parse_plugin_cfg($plugin, $sections=false) {
diff --git a/plugins/dynamix/include/update.parity.php b/plugins/dynamix/include/update.parity.php
index 5a99674b8..4e40b9e7b 100644
--- a/plugins/dynamix/include/update.parity.php
+++ b/plugins/dynamix/include/update.parity.php
@@ -11,7 +11,7 @@
  */
 ?>
 <?
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 require_once "$docroot/webGui/include/Wrappers.php";
 
 $memory = '/tmp/memory.tmp';
diff --git a/plugins/dynamix/include/update.ssmtp.php b/plugins/dynamix/include/update.ssmtp.php
index dee6e566d..e71f15cce 100644
--- a/plugins/dynamix/include/update.ssmtp.php
+++ b/plugins/dynamix/include/update.ssmtp.php
@@ -11,7 +11,7 @@
  */
 ?>
 <?
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 require_once "$docroot/webGui/include/Encryption.php";
 
 $_POST['AuthPass'] = base64_encrypt($_POST['AuthPass']);
diff --git a/plugins/dynamix/scripts/diagnostics b/plugins/dynamix/scripts/diagnostics
index 5dacdd911..4c3133c24 100755
--- a/plugins/dynamix/scripts/diagnostics
+++ b/plugins/dynamix/scripts/diagnostics
@@ -19,7 +19,7 @@ $cli = empty($zip);
 $get = "/var/local/emhttp";
 $var = file_exists("$get/var.ini") ? parse_ini_file("$get/var.ini") : [];
 
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 $folders = ['/boot','/boot/config','/boot/config/plugins','/boot/extra','/boot/syslinux','/var/log','/var/log/plugins','/var/log/packages','/tmp'];
 
 function anonymize($text,$select) {
diff --git a/plugins/dynamix/scripts/disk_log b/plugins/dynamix/scripts/disk_log
index 93b1e5647..f5a1b189a 100755
--- a/plugins/dynamix/scripts/disk_log
+++ b/plugins/dynamix/scripts/disk_log
@@ -14,7 +14,7 @@
 <?
 echo "<p style='text-align:center'><span class='error label'>Error</span><span class='warn label'>Warning</span><span class='system label'>System</span><span class='array label'>Array</span></p>\n";
 
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 require_once "$docroot/webGui/include/ColorCoding.php";
 
 $ata = exec("ls -n  ".escapeshellarg("/sys/block/{$argv[1]}")."|grep -Po 'ata\d+'");
diff --git a/plugins/dynamix/scripts/emhttpd_update b/plugins/dynamix/scripts/emhttpd_update
index 8d41f9c48..8c9e4d9c1 100755
--- a/plugins/dynamix/scripts/emhttpd_update
+++ b/plugins/dynamix/scripts/emhttpd_update
@@ -12,7 +12,7 @@
  */
 ?>
 <?
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 require_once "$docroot/webGui/include/publish.php";
 curl_socket("/var/run/emhttpd.socket", "http://localhost/status.htm");
 ?>
diff --git a/plugins/dynamix/scripts/flash_backup b/plugins/dynamix/scripts/flash_backup
index af28c07aa..e8a1f6f93 100755
--- a/plugins/dynamix/scripts/flash_backup
+++ b/plugins/dynamix/scripts/flash_backup
@@ -12,7 +12,7 @@
  */
 ?>
 <?
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 $var = file_exists('/var/local/emhttp/var.ini') ? parse_ini_file('/var/local/emhttp/var.ini') : [];
 $dir = ['system','appdata','isos','domains'];
 $out = ['prev','previous','syslinux'];
diff --git a/plugins/dynamix/scripts/monitor b/plugins/dynamix/scripts/monitor
index f4955c2eb..d5f57c4f8 100755
--- a/plugins/dynamix/scripts/monitor
+++ b/plugins/dynamix/scripts/monitor
@@ -16,7 +16,7 @@ $var   = parse_ini_file("/var/local/emhttp/var.ini");
 $devs  = parse_ini_file("/var/local/emhttp/devs.ini",true);
 $disks = parse_ini_file("/var/local/emhttp/disks.ini",true);
 
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 require_once "$docroot/webGui/include/Wrappers.php";
 require_once "$docroot/webGui/include/Preselect.php";
 require_once "$docroot/webGui/include/CustomMerge.php";
@@ -201,7 +201,7 @@ foreach ($disks as $disk) {
 // process disk SMART notifications
   check_smart($name,port_name($disk['smDevice'] ?? $disk['device']),$text,$info);
 // process disk usage notifications
-  check_usage($name,($disk['fsSize']?100-round(100*$disk['fsFree']/$disk['fsSize']):-1),$text,$info);
+  check_usage($name,isset($disk['fsSize'])&&$disk['fsSize']>0?100-round(100*$disk['fsFree']/$disk['fsSize']):-1,$text,$info);
 // process disk operation notifications
   $warn = strtok($disk['color'],'-');
   $item = 'disk';
@@ -231,7 +231,7 @@ foreach ($disks as $disk) {
   if ($disk['numErrors']>0) $errors[] = "$text - $info (errors {$disk['numErrors']})";
 // check file system of cache pool
   $item = 'pool';
-  if ($name=='cache' && strpos($disk['fsType'],'btrfs')) {
+  if ($name=='cache' && strpos($disk['fsType'],'btrfs')!==false) {
     $attr = 'missing';
     if (exec("/sbin/btrfs filesystem show {$disk['uuid']} 2>/dev/null|grep -c 'missing'")>0) {
       if (empty($saved[$item][$attr])) {
diff --git a/plugins/dynamix/scripts/notify b/plugins/dynamix/scripts/notify
index 4550191e7..9048c8190 100755
--- a/plugins/dynamix/scripts/notify
+++ b/plugins/dynamix/scripts/notify
@@ -13,7 +13,7 @@
  */
 ?>
 <?
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 require_once "$docroot/webGui/include/Wrappers.php";
 require_once "$docroot/webGui/include/Encryption.php";
 
diff --git a/plugins/dynamix/scripts/statuscheck b/plugins/dynamix/scripts/statuscheck
index 236bd31f2..a398db93e 100755
--- a/plugins/dynamix/scripts/statuscheck
+++ b/plugins/dynamix/scripts/statuscheck
@@ -15,7 +15,7 @@
 $var   = parse_ini_file("/var/local/emhttp/var.ini");
 $disks = parse_ini_file("/var/local/emhttp/disks.ini",true);
 
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 require_once "$docroot/webGui/include/Wrappers.php";
 require_once "$docroot/webGui/include/CustomMerge.php";
 
diff --git a/plugins/dynamix/scripts/tail_log b/plugins/dynamix/scripts/tail_log
index 593f9e649..9a4fdbf1d 100755
--- a/plugins/dynamix/scripts/tail_log
+++ b/plugins/dynamix/scripts/tail_log
@@ -14,7 +14,7 @@
 <?
 echo "<p style='text-align:center'><span class='error label'>Error</span><span class='warn label'>Warning</span><span class='system label'>System</span><span class='array label'>Array</span><span class='login label'>Login</span></p>\n";
 
-$docroot = $docroot ?: $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 require_once "$docroot/webGui/include/ColorCoding.php";
 
 $handle = popen('/usr/bin/tail -n 40 -f '.escapeshellarg("/var/log/{$argv[1]}").' 2>&1', 'r');