diff --git a/phpdotnet/phd/Format.php b/phpdotnet/phd/Format.php
index 16ced847..f6b5045c 100644
--- a/phpdotnet/phd/Format.php
+++ b/phpdotnet/phd/Format.php
@@ -479,6 +479,8 @@ public function getEntryOffset(array $attrs) {
         return -1;
     }
     public function colspan(array $attrs) {
+        $to = 0;
+        $from = 0;
         if (isset($attrs["namest"])) {
             foreach($this->TABLE["colspec"] as $spec) {
                 if ($spec["colname"] == $attrs["namest"]) {
diff --git a/phpdotnet/phd/Highlighter/GeSHi11x.php b/phpdotnet/phd/Highlighter/GeSHi11x.php
index 3acca71d..aaaa9fdd 100644
--- a/phpdotnet/phd/Highlighter/GeSHi11x.php
+++ b/phpdotnet/phd/Highlighter/GeSHi11x.php
@@ -35,6 +35,8 @@
  */
 class Highlighter_GeSHi11x extends Highlighter
 {
+    private $geshi;
+    
     /**
     * Create a new highlighter instance for the given format.
     *
diff --git a/phpdotnet/phd/PI/PHPDOCHandler.php b/phpdotnet/phd/PI/PHPDOCHandler.php
index fa6859b4..3ccdb7dd 100644
--- a/phpdotnet/phd/PI/PHPDOCHandler.php
+++ b/phpdotnet/phd/PI/PHPDOCHandler.php
@@ -22,12 +22,14 @@ public function parse($target, $data) {
                 if ($this->format instanceof Index) {
                     return;
                 }
+                $desc = "";
                 switch($matches["value"]) {
                     case "function":
                     case "refentry":
                         $tmp = $this->format->getRefs();
                         $refs = array();
                         $info = array();
+                        $islong = false;
                         foreach($tmp as $id) {
                             $filename = $this->format->createLink($id, $desc);
                             $refs[$filename] = $desc;
@@ -136,6 +138,7 @@ protected function generateChangelogMarkup($changelogs) {
         $ret .= "</tr></thead>";
 
         $version = "";
+        $desc = "";
         foreach($changelogs as $entry) {
             if (!$this->_changelogSince || version_compare($entry["version"], $this->_changelogSince) >= 0) {
                 $link = $this->format->createLink($entry["docbook_id"], $desc);
diff --git a/phpdotnet/phd/Package/Generic/Manpage.php b/phpdotnet/phd/Package/Generic/Manpage.php
index b86229a0..7357f802 100644
--- a/phpdotnet/phd/Package/Generic/Manpage.php
+++ b/phpdotnet/phd/Package/Generic/Manpage.php
@@ -235,6 +235,7 @@ class Package_Generic_Manpage extends Format_Abstract_Manpage {
     protected $bookName = "";
     protected $date = "";
 
+    private array $pChunk = [];
     /* Current Chunk variables */
     protected $cchunk      = array();
     /* Default Chunk variables */
diff --git a/phpdotnet/phd/Package/Generic/PDF.php b/phpdotnet/phd/Package/Generic/PDF.php
index 1254847b..8a493497 100644
--- a/phpdotnet/phd/Package/Generic/PDF.php
+++ b/phpdotnet/phd/Package/Generic/PDF.php
@@ -295,6 +295,8 @@ abstract class Package_Generic_PDF extends Format_Abstract_PDF {
         "corefs"                => array(),
         "callouts"              => 0,
     );
+    
+    private array $params = [];
 
     public function __construct(
         Config $config,
diff --git a/phpdotnet/phd/Package/IDE/Base.php b/phpdotnet/phd/Package/IDE/Base.php
index fadc967f..d6d8fda4 100644
--- a/phpdotnet/phd/Package/IDE/Base.php
+++ b/phpdotnet/phd/Package/IDE/Base.php
@@ -75,6 +75,8 @@ abstract class Package_IDE_Base extends Format {
         'changelog'             => array(),
         'seealso'               => array(),
     );
+    
+    private array $chunkFlags = [];
 
     public function __construct(
         Config $config,
diff --git a/phpdotnet/phd/Package/PEAR/ChunkedXHTML.php b/phpdotnet/phd/Package/PEAR/ChunkedXHTML.php
index 69f17afd..8a8383b5 100755
--- a/phpdotnet/phd/Package/PEAR/ChunkedXHTML.php
+++ b/phpdotnet/phd/Package/PEAR/ChunkedXHTML.php
@@ -2,6 +2,11 @@
 namespace phpdotnet\phd;
 
 class Package_PEAR_ChunkedXHTML extends Package_PEAR_XHTML {
+    
+    private array $prev = [];
+    private array $next = [];
+    private array $up = [];
+    
     public function __construct(
         Config $config,
         OutputHandler $outputHandler
diff --git a/phpdotnet/phd/Package/PEAR/XHTML.php b/phpdotnet/phd/Package/PEAR/XHTML.php
index b7fd627b..6b126ec3 100755
--- a/phpdotnet/phd/Package/PEAR/XHTML.php
+++ b/phpdotnet/phd/Package/PEAR/XHTML.php
@@ -361,6 +361,8 @@ abstract class Package_PEAR_XHTML extends Package_Generic_XHTML {
     * @var string
     */
     public $phd_pearapi_urlprefix = 'http://pear.php.net/package/';
+    
+    private string $phd_pearapi_text = "";
 
     /* Current Chunk settings */
     protected $cchunk          = array();
@@ -541,7 +543,7 @@ public function format_exception_chunk($open, $name, $attrs, $props)
     public function format_link($open, $name, $attrs, $props)
     {
         if ($open) {
-            $content = $fragment = '';
+            $content = $fragment = $href = $id = '';
             $class = $name;
 
             if (isset($attrs[Reader::XMLNS_DOCBOOK]['linkend'])) {
diff --git a/phpdotnet/phd/Package/PHP/XHTML.php b/phpdotnet/phd/Package/PHP/XHTML.php
index fc1c4cc8..9adb2170 100644
--- a/phpdotnet/phd/Package/PHP/XHTML.php
+++ b/phpdotnet/phd/Package/PHP/XHTML.php
@@ -331,6 +331,7 @@ public static function generateAcronymInfo($filename) {
         }
 
         $acronyms = array();
+        $k = "";
         while ($r->read()) {
             if ($r->nodeType != \XMLReader::ELEMENT) {
                 continue;