[PHP 8.1] Fix passing null to non-nullable internal function params

app/code/core/Mage/Adminhtml/Block/Customer/Edit/Tab/View.php

@@ -154,6 +154,7 @@ public function getCurrentStatus()
     {
         $log = $this->getCustomerLog();
         if ($log->getLogoutAt()
+            || !$log->getLastVisitAt()
             || strtotime(Varien_Date::now()) - strtotime($log->getLastVisitAt()) > Mage_Log_Model_Visitor::getOnlineMinutesInterval() * 60
         ) {
             return Mage::helper('customer')->__('Offline');

app/code/core/Mage/Adminhtml/Block/Customer/Online/Grid/Renderer/Url.php

@@ -36,6 +36,7 @@ class Mage_Adminhtml_Block_Customer_Online_Grid_Renderer_Url extends Mage_Adminh
      */
     public function render(Varien_Object $row)
     {
-        return htmlspecialchars($row->getData($this->getColumn()->getIndex()));
+        $value = $row->getData($this->getColumn()->getIndex());
+        return empty($value) ? '' : htmlspecialchars($value);
     }
 }

app/code/core/Mage/Adminhtml/Block/Newsletter/Template/Preview.php

@@ -41,7 +41,7 @@ protected function _toHtml()
             $template->setTemplateStyles($this->getRequest()->getParam('styles'));
         }
         $template->setTemplateStyles(
-            $this->maliciousCodeFilter($template->getTemplateStyles())
+            $this->maliciousCodeFilter((string)$template->getTemplateStyles())
         );
         $template->setTemplateText(
             $this->maliciousCodeFilter($template->getTemplateText())

app/code/core/Mage/Adminhtml/Block/Page/Menu.php

@@ -153,7 +153,7 @@ protected function _buildMenuArray(Varien_Simplexml_Element $parent, $path = '',
             }
 
             $menuArr['active'] = ($this->getActive() == $path . $childName)
-                || (strpos($this->getActive(), $path . $childName . '/') === 0);
+                || (strpos((string)$this->getActive(), $path . $childName . '/') === 0);
 
             $menuArr['level'] = $level;
 

app/code/core/Mage/Adminhtml/Block/Report/Grid/Abstract.php

@@ -135,7 +135,7 @@ protected function _getStoreIds()
     {
         $filterData = $this->getFilterData();
         if ($filterData) {
-            $storeIds = explode(',', $filterData->getData('store_ids'));
+            $storeIds = explode(',', (string)$filterData->getData('store_ids'));
         } else {
             $storeIds = [];
         }

app/code/core/Mage/Adminhtml/Block/Widget/Grid/Column.php

@@ -233,7 +233,7 @@ public function setRenderer($renderer)
 
     protected function _getRendererByType()
     {
-        $type = strtolower($this->getType());
+        $type = strtolower((string)$this->getType());
         $renderers = $this->getGrid()->getColumnRenderers();
 
         if (is_array($renderers) && isset($renderers[$type])) {
@@ -328,7 +328,7 @@ public function setFilter($filterClass)
 
     protected function _getFilterByType()
     {
-        $type = strtolower($this->getType());
+        $type = strtolower((string)$this->getType());
         $filters = $this->getGrid()->getColumnFilters();
         if (is_array($filters) && isset($filters[$type])) {
             return $filters[$type];

app/code/core/Mage/Adminhtml/Block/Widget/Grid/Column/Filter/Abstract.php

@@ -87,7 +87,7 @@ protected function _getHtmlId()
      */
     public function getEscapedValue($index = null)
     {
-        return htmlspecialchars($this->getValue($index));
+        return htmlspecialchars((string)$this->getValue($index));
     }
 
     /**

app/code/core/Mage/Adminhtml/Block/Widget/Grid/Column/Renderer/Abstract.php

@@ -92,7 +92,10 @@ protected function _getValue(Varien_Object $row)
             }
             return '';
         }
-        return $row->getData($this->getColumn()->getIndex());
+        if ($index = $this->getColumn()->getIndex()) {
+            return $row->getData($index);
+        }
+        return null;
     }
 
     /**
@@ -123,7 +126,7 @@ public function renderHeader()
     {
         if ($this->getColumn()->getGrid()->getSortable() !== false && $this->getColumn()->getSortable() !== false) {
             $className = 'not-sort';
-            $dir = strtolower($this->getColumn()->getDir());
+            $dir = strtolower((string)$this->getColumn()->getDir());
             $nDir = ($dir == 'asc') ? 'desc' : 'asc';
             if ($this->getColumn()->getDir()) {
                 $className = 'sort-arrow-' . $dir;

app/code/core/Mage/Adminhtml/Block/Widget/Grid/Column/Renderer/Currency.php

@@ -87,7 +87,7 @@ protected function _getRate($row)
         if ($rate = $this->getColumn()->getRate()) {
             return (float) $rate;
         }
-        if ($rate = $row->getData($this->getColumn()->getRateField())) {
+        if (($rateField = $this->getColumn()->getRateField()) && ($rate = $row->getData($rateField))) {
             return (float) $rate;
         }
         return 1;

app/code/core/Mage/Adminhtml/Block/Widget/Grid/Column/Renderer/Longtext.php

@@ -47,7 +47,7 @@ public function render(Varien_Object $row)
         if ($this->getColumn()->getTruncate()) {
             $truncateLength = $this->getColumn()->getTruncate();
         }
-        $text = Mage::helper('core/string')->truncate(parent::_getValue($row), $truncateLength);
+        $text = Mage::helper('core/string')->truncate((string)parent::_getValue($row), $truncateLength);
         if ($this->getColumn()->getEscape() !== false) {
             $text = $this->escapeHtml($text);
         }

app/code/core/Mage/Adminhtml/Block/Widget/Grid/Column/Renderer/Price.php

@@ -85,7 +85,7 @@ protected function _getRate($row)
         if ($rate = $this->getColumn()->getRate()) {
             return (float) $rate;
         }
-        if ($rate = $row->getData($this->getColumn()->getRateField())) {
+        if (($rateField = $this->getColumn()->getRateField()) && ($rate = $row->getData($rateField))) {
             return (float) $rate;
         }
         return 1;

app/code/core/Mage/Adminhtml/Block/Widget/Grid/Column/Renderer/Text.php

@@ -48,7 +48,7 @@ public function _getValue(Varien_Object $row)
         if (is_null($format)) {
             // If no format and it column not filtered specified return data as is.
             $data = parent::_getValue($row);
-            $string = is_null($data) ? $defaultValue : $data;
+            $string = $data ?? $defaultValue ?? '';
             return $this->escapeHtml($string);
         } elseif (preg_match_all($this->_variablePattern, $format, $matches)) {
             // Parsing of format string

app/code/core/Mage/Catalog/Model/Category.php

@@ -714,7 +714,7 @@ public function getPathIds()
     {
         $ids = $this->getData('path_ids');
         if (is_null($ids)) {
-            $ids = explode('/', $this->getPath());
+            $ids = explode('/', (string)$this->getPath());
             $this->setData('path_ids', $ids);
         }
         return $ids;
@@ -728,7 +728,7 @@ public function getPathIds()
     public function getLevel()
     {
         if (!$this->hasLevel()) {
-            return count(explode('/', $this->getPath())) - 1;
+            return count(explode('/', (string)$this->getPath())) - 1;
         }
         return $this->getData('level');
     }

app/code/core/Mage/Core/Model/Design/Package.php

@@ -518,7 +518,7 @@ public function getLocaleFileName($file, array $params = [])
     /**
      * Get skin file url
      *
-     * @param string $file
+     * @param string|null $file
      * @param array $params
      * @return string
      * @throws Exception
@@ -528,7 +528,7 @@ public function getSkinUrl($file = null, array $params = [])
         Varien_Profiler::start(__METHOD__);
 
         // Prevent reading files outside of the proper directory while still allowing symlinked files
-        if (strpos($file, '..') !== false) {
+        if (strpos((string)$file, '..') !== false) {
             Mage::log(sprintf('Invalid path requested: %s (params: %s)', $file, json_encode($params)), Zend_Log::ERR);
             throw new Exception('Invalid path requested.');
         }

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

@@ -840,16 +840,16 @@ public function isStoreDateInInterval($store, $dateFrom = null, $dateTo = null)
         }
 
         $storeTimeStamp = $this->storeTimeStamp($store);
-        $fromTimeStamp  = strtotime($dateFrom);
-        $toTimeStamp    = strtotime($dateTo);
+        $fromTimeStamp  = strtotime((string)$dateFrom);
+        $toTimeStamp    = strtotime((string)$dateTo);
         if ($dateTo) {
             // fix date YYYY-MM-DD 00:00:00 to YYYY-MM-DD 23:59:59
             $toTimeStamp += 86400;
         }
 
         $result = false;
-        if (!is_empty_date($dateFrom) && $storeTimeStamp < $fromTimeStamp) {
-        } elseif (!is_empty_date($dateTo) && $storeTimeStamp > $toTimeStamp) {
+        if (!is_empty_date((string)$dateFrom) && $storeTimeStamp < $fromTimeStamp) {
+        } elseif (!is_empty_date((string)$dateTo) && $storeTimeStamp > $toTimeStamp) {
         } else {
             $result = true;
         }

app/code/core/Mage/Core/Model/Url/Rewrite.php

@@ -152,7 +152,7 @@ public function loadByTags($tags)
      */
     public function hasOption($key)
     {
-        $optArr = explode(',', $this->getOptions());
+        $optArr = explode(',', (string)$this->getOptions());
 
         return in_array($key, $optArr);
     }

app/code/core/Mage/Customer/Model/Address/Abstract.php

@@ -143,7 +143,7 @@ public function getStreet($line = 0)
         if ($line === -1) {
             return $street;
         } else {
-            $arr = is_array($street) ? $street : explode("\n", $street);
+            $arr = is_array($street) ? $street : explode("\n", (string)$street);
             if ($line === 0 || $line === null) {
                 return $arr;
             } elseif (isset($arr[$line - 1])) {

app/code/core/Mage/Eav/Block/Adminhtml/Attribute/Edit/Options/Abstract.php

@@ -110,7 +110,7 @@ public function getOptionValues()
         $attributeType = $this->getAttributeObject()->getFrontendInput();
         $defaultValues = $this->getAttributeObject()->getDefaultValue();
         if ($attributeType === 'select' || $attributeType === 'multiselect') {
-            $defaultValues = explode(',', $defaultValues);
+            $defaultValues = explode(',', (string)$defaultValues);
         } else {
             $defaultValues = [];
         }

app/code/core/Mage/Eav/Model/Attribute/Data/Multiline.php

@@ -129,7 +129,7 @@ public function outputValue($format = Mage_Eav_Model_Attribute_Data::OUTPUT_FORM
     {
         $values = $this->getEntity()->getData($this->getAttribute()->getAttributeCode());
         if (!is_array($values)) {
-            $values = explode("\n", $values);
+            $values = explode("\n", (string)$values);
         }
         $values = array_map([$this, '_applyOutputFilter'], $values);
         switch ($format) {

app/code/core/Mage/Eav/Model/Entity/Attribute/Backend/Time/Created.php

@@ -35,8 +35,8 @@ class Mage_Eav_Model_Entity_Attribute_Backend_Time_Created extends Mage_Eav_Mode
      */
     protected function _getFormat($date)
     {
-        if (is_string($date) && preg_match('#^\d{4,4}-\d{2,2}-\d{2,2}\s\d{2,2}:\d{2,2}:\d{2,2}$#', $date)
-            || preg_match('#^\d{4,4}-\d{2,2}-\d{2,2}\w{1,1}\d{2,2}:\d{2,2}:\d{2,2}[+-]\d{2,2}:\d{2,2}$#', $date)
+        if (is_string($date) && (preg_match('#^\d{4,4}-\d{2,2}-\d{2,2}\s\d{2,2}:\d{2,2}:\d{2,2}$#', $date)
+            || preg_match('#^\d{4,4}-\d{2,2}-\d{2,2}\w{1,1}\d{2,2}:\d{2,2}:\d{2,2}[+-]\d{2,2}:\d{2,2}$#', $date))
         ) {
             return 'yyyy-MM-dd HH:mm:ss';
         }

app/code/core/Mage/Eav/Model/Entity/Type.php

@@ -256,7 +256,7 @@ public function getValueTablePrefix()
      */
     public function getEntityTablePrefix()
     {
-        $tablePrefix = trim($this->_data['value_table_prefix']);
+        $tablePrefix = trim((string)$this->_data['value_table_prefix']);
 
         if (empty($tablePrefix)) {
             $tablePrefix = $this->getEntityTable();

app/code/core/Mage/Widget/Model/Widget/Instance.php

@@ -229,7 +229,7 @@ public function getType()
      */
     protected function _prepareType()
     {
-        if (strpos($this->_getData('type'), '-') >= 0) {
+        if (strpos((string)$this->_getData('type'), '-') !== false) {
             $this->setData('type', str_replace('-', '/', $this->_getData('type')));
         }
         return $this;

lib/Varien/Data/Form.php

@@ -301,7 +301,7 @@ public function toHtml()
         if ($useContainer = $this->getUseContainer()) {
             $html .= '<form ' . $this->serialize($this->getHtmlAttributes()) . '>';
             $html .= '<div>';
-            if (strtolower($this->getData('method')) == 'post') {
+            if (strtolower((string)$this->getData('method')) == 'post') {
                 $html .= '<input name="form_key" type="hidden" value="' . Mage::getSingleton('core/session')->getFormKey() . '" />';
             }
             $html .= '</div>';

lib/Varien/Data/Form/Element/Abstract.php

@@ -223,7 +223,7 @@ public function getEscapedValue($index = null)
         if ($filter = $this->getValueFilter()) {
             $value = $filter->filter($value);
         }
-        return $this->_escape($value);
+        return $this->_escape((string)$value);
     }
 
     /**

lib/Varien/Data/Form/Element/Multiselect.php

@@ -72,7 +72,7 @@ public function getElementHtml()
 
         $value = $this->getValue();
         if (!is_array($value)) {
-            $value = explode(',', $value);
+            $value = explode(',', (string)$value);
         }
 
         if ($values = $this->getValues()) {

phpstan.dist.baseline.neon

@@ -7165,11 +7165,6 @@ parameters:
 			count: 1
 			path: app/code/core/Mage/Widget/Block/Adminhtml/Widget/Options.php
 
-		-
-			message: "#^Comparison operation \"\\>\\=\" between int\\<0, max\\>\\|false and 0 is always true\\.$#"
-			count: 1
-			path: app/code/core/Mage/Widget/Model/Widget/Instance.php
-
 		-
 			message: "#^If condition is always true\\.$#"
 			count: 1