PhpStan fixes

app/code/core/Mage/Cms/Model/Wysiwyg/Images/Storage.php

@@ -28,7 +28,7 @@ class Mage_Cms_Model_Wysiwyg_Images_Storage extends Varien_Object
     /**
      * Config object
      *
-     * @var Mage_Core_Model_Config_Element|Varien_Simplexml_Element|false
+     * @var Mage_Core_Model_Config_Element
      */
     protected $_config;
 

app/code/core/Mage/Core/Block/Abstract.php

@@ -993,7 +993,9 @@ protected function _getUrlModelClass()
      */
     protected function _getUrlModel()
     {
-        return Mage::getModel($this->_getUrlModelClass());
+        /** @var Mage_Core_Model_Url $model */
+        $model = Mage::getModel($this->_getUrlModelClass());
+        return $model;
     }
 
     /**

app/code/core/Mage/Core/Helper/String.php

@@ -466,7 +466,7 @@ protected function _getLastSubkey($key, $withBrackets = true)
     /**
      * Set array helper
      *
-     * @param Mage_Core_Helper_Abstract|Mage_Core_Helper_Array $helper
+     * @param Mage_Core_Helper_Array $helper
      * @return $this
      */
     public function setArrayHelper(Mage_Core_Helper_Abstract $helper)

app/code/core/Mage/Core/Model/Config.php

@@ -724,7 +724,7 @@ protected function _getSectionConfig($path)
      * Get node value from cached section data
      *
      * @param array $path
-     * @return false|Varien_Simplexml_Element
+     * @return false|Mage_Core_Model_Config_Element
      */
     public function getSectionNode($path)
     {
@@ -741,7 +741,7 @@ public function getSectionNode($path)
      * Returns node found by the $path and scope info
      *
      * @inheritDoc
-     * @return Mage_Core_Model_Config_Element|Varien_Simplexml_Element|false
+     * @return Mage_Core_Model_Config_Element
      */
     public function getNode($path = null, $scope = '', $scopeCode = null)
     {
@@ -1150,7 +1150,7 @@ public function substDistroServerVars($data)
      * Get module config node
      *
      * @param string $moduleName
-     * @return Mage_Core_Model_Config_Element|SimpleXMLElement
+     * @return Mage_Core_Model_Config_Element
      */
     public function getModuleConfig($moduleName = '')
     {

app/code/core/Mage/Core/Model/Store.php

@@ -967,9 +967,9 @@ public function roundPrice($price)
     /**
      * Format price with currency filter (taking rate into consideration)
      *
-     * @param   double $price
+     * @param   float $price
      * @param   bool $includeContainer
-     * @return  string
+     * @return  string|float
      */
     public function formatPrice($price, $includeContainer = true)
     {

app/code/core/Mage/Core/functions.php

@@ -103,7 +103,7 @@ function mageFindClassFile($class)
  * @param string $errstr
  * @param string $errfile
  * @param int $errline
- * @return bool|void
+ * @return bool|null
  */
 function mageCoreErrorHandler($errno, $errstr, $errfile, $errline)
 {
@@ -184,14 +184,15 @@ function mageCoreErrorHandler($errno, $errstr, $errfile, $errline)
         throw new Exception($errorMessage);
     } else {
         Mage::log($errorMessage, Zend_Log::ERR);
+        return null;
     }
 }
 
 /**
  * @param bool $return
  * @param bool $html
  * @param bool $showFirst
- * @return string|void
+ * @return string|null
  *
  * @SuppressWarnings(PHPMD.ErrorControlOperator)
  */
@@ -216,6 +217,7 @@ function mageDebugBacktrace($return = false, $html = true, $showFirst = false)
         return $out;
     } else {
         echo $out;
+        return null;
     }
 }
 

app/code/core/Mage/Tag/Block/Customer/Tags.php

@@ -31,7 +31,7 @@ protected function _loadTags()
             $this->_tags = [];
 
             $tags = Mage::getResourceModel('tag/tag_collection')
-                ->addPopularity(null, Mage::app()->getStore()->getId())
+                ->addPopularity()
                 ->setOrder('popularity', 'DESC')
                 ->addCustomerFilter(Mage::getSingleton('customer/session')->getCustomerId())
                 ->setActiveFilter()

app/code/core/Mage/Tag/Block/Product/List.php

@@ -83,7 +83,7 @@ protected function _getCollection()
     protected function _beforeToHtml()
     {
         if (!$this->getProductId()) {
-            return false;
+            return $this;
         }
 
         return parent::_beforeToHtml();

app/code/core/Mage/Tag/Block/Product/Result.php

@@ -24,7 +24,7 @@
 class Mage_Tag_Block_Product_Result extends Mage_Catalog_Block_Product_Abstract
 {
     /**
-     * @var Mage_Tag_Model_Resource_Tag_Collection|null
+     * @var Mage_Tag_Model_Resource_Product_Collection|null
      */
     protected $_productCollection;
 
@@ -81,7 +81,7 @@ public function getProductListHtml()
     }
 
     /**
-     * @return Mage_Tag_Model_Resource_Tag_Collection
+     * @return Mage_Tag_Model_Resource_Product_Collection
      * @throws Mage_Core_Model_Store_Exception
      */
     protected function _getProductCollection()

app/code/core/Mage/Tag/Model/Api.php

@@ -95,6 +95,7 @@ public function info($tagId, $store)
      */
     public function add($data)
     {
+        $result = [];
         $data = $this->_prepareDataForAdd($data);
         /** @var Mage_Catalog_Model_Product $product */
         $product = Mage::getModel('catalog/product')->load($data['product_id']);

app/code/core/Mage/Tag/Model/Api/V2.php

@@ -59,7 +59,7 @@ public function add($data)
      *
      * @param int $tagId
      * @param string|int $store
-     * @return object
+     * @return array
      */
     public function info($tagId, $store)
     {
@@ -74,7 +74,7 @@ public function info($tagId, $store)
     /**
      * Convert data from object to array before add
      *
-     * @param object $data
+     * @param array|object $data
      * @return array
      */
     protected function _prepareDataForAdd($data)
@@ -86,7 +86,7 @@ protected function _prepareDataForAdd($data)
     /**
      * Convert data from object to array before update
      *
-     * @param object $data
+     * @param array|object $data
      * @return array
      */
     protected function _prepareDataForUpdate($data)

app/code/core/Mage/Tag/Model/Entity/Customer/Collection.php

@@ -22,6 +22,7 @@
 class Mage_Tag_Model_Entity_Customer_Collection extends Mage_Customer_Model_Entity_Customer_Collection
 {
     protected $_tagTable;
+
     protected $_tagRelTable;
 
     public function __construct()

app/code/core/Mage/Tag/Model/Resource/Customer/Collection.php

@@ -268,6 +268,7 @@ public function getSelectCountSql()
     public function addProductName()
     {
         $productsId   = [];
+        $productsSku  = [];
         $productsData = [];
 
         foreach ($this->getItems() as $item) {

app/code/core/Mage/Tag/Model/Tag.php

@@ -366,6 +366,7 @@ public function saveRelation($productId, $customerId, $storeId)
             ->setActive(Mage_Tag_Model_Tag_Relation::STATUS_ACTIVE)
             ->setCreatedAt($relationModel->getResource()->formatDate(time()));
 
+        $result = null;
         $relationModelSaveNeed = false;
         switch ($this->getStatus()) {
             case $this->getApprovedStatus():

lib/Varien/Simplexml/Element.php

@@ -128,7 +128,7 @@ public function addChild($name, $value=null, $namespace=null)
      * @todo    Do we need to make it xpath look-a-like?
      * @todo    Check if we still need all this and revert to plain XPath if this makes any sense
      * @todo    param string $path Subset of xpath. Example: "child/grand[@attrName='attrValue']/subGrand"
-     * @param   string $path Example: "child/grand@attrName=attrValue/subGrand" (to make it faster without regex)
+     * @param   array|string $path Example: "child/grand@attrName=attrValue/subGrand" (to make it faster without regex)
      * @return  Varien_Simplexml_Element|false
      */
     public function descend($path)