Clean code

app/code/Magento/Analytics/ReportXml/ReportProvider.php

@@ -57,7 +57,7 @@ public function __construct(
     private function getIteratorName(Query $query)
     {
         $config = $query->getConfig();
-        return isset($config['iterator']) ? $config['iterator'] : null;
+        return $config['iterator'] ?? null;
     }
 
     /**

app/code/Magento/Backend/App/DefaultPath.php

@@ -42,6 +42,6 @@ public function __construct(\Magento\Backend\App\ConfigInterface $config)
      */
     public function getPart($code)
     {
-        return isset($this->_parts[$code]) ? $this->_parts[$code] : null;
+        return $this->_parts[$code] ?? null;
     }
 }

app/code/Magento/Backend/Model/Menu/Builder.php

@@ -102,6 +102,6 @@ public function getResult(\Magento\Backend\Model\Menu $menu)
      */
     protected function _getParam($params, $paramName, $defaultValue = null)
     {
-        return isset($params[$paramName]) ? $params[$paramName] : $defaultValue;
+        return $params[$paramName]?? $defaultValue;
     }
 }

app/code/Magento/Backup/Helper/Data.php

@@ -110,7 +110,7 @@ public function getBackupsDir()
     public function getExtensionByType($type)
     {
         $extensions = $this->getExtensions();
-        return isset($extensions[$type]) ? $extensions[$type] : '';
+        return $extensions[$type] ?? '';
     }
 
     /**

app/code/Magento/BundleImportExport/Model/Export/RowCustomizer.php

@@ -321,7 +321,7 @@ function ($title, $storeName) {
      */
     protected function getTypeValue($type)
     {
-        return isset($this->typeMapping[$type]) ? $this->typeMapping[$type] : self::VALUE_DYNAMIC;
+        return $this->typeMapping[$type]??  self::VALUE_DYNAMIC;
     }
 
     /**
@@ -332,7 +332,7 @@ protected function getTypeValue($type)
      */
     protected function getPriceViewValue($type)
     {
-        return isset($this->priceViewMapping[$type]) ? $this->priceViewMapping[$type] : self::VALUE_PRICE_RANGE;
+        return $this->priceViewMapping[$type] ?? self::VALUE_PRICE_RANGE;
     }
 
     /**
@@ -343,7 +343,7 @@ protected function getPriceViewValue($type)
      */
     protected function getPriceTypeValue($type)
     {
-        return isset($this->priceTypeMapping[$type]) ? $this->priceTypeMapping[$type] : null;
+        return $this->priceTypeMapping[$type] ?? null;
     }
 
     /**
@@ -354,7 +354,7 @@ protected function getPriceTypeValue($type)
      */
     private function getShipmentTypeValue($type)
     {
-        return isset($this->shipmentTypeMapping[$type]) ? $this->shipmentTypeMapping[$type] : null;
+        return $this->shipmentTypeMapping[$type] ?? null;
     }
 
     /**

app/code/Magento/Captcha/Observer/CaptchaStringResolver.php

@@ -18,6 +18,6 @@ public function resolve(\Magento\Framework\App\RequestInterface $request, $formI
     {
         $captchaParams = $request->getPost(\Magento\Captcha\Helper\Data::INPUT_NAME_FIELD_VALUE);
 
-        return isset($captchaParams[$formId]) ? $captchaParams[$formId] : '';
+        return $captchaParams[$formId] ?? '';
     }
 }

app/code/Magento/Catalog/Block/Product/View/Gallery.php

@@ -175,7 +175,7 @@ public function getImageAttribute($imageId, $attributeName, $default = null)
     {
         $attributes =
             $this->getConfigView()->getMediaAttributes('Magento_Catalog', Image::MEDIA_TYPE_CONFIG_NODE, $imageId);
-        return isset($attributes[$attributeName]) ? $attributes[$attributeName] : $default;
+        return $attributes[$attributeName] ?? $default;
     }
 
     /**

app/code/Magento/Catalog/Cron/FrontendActionsFlush.php

@@ -57,8 +57,7 @@ private function getLifeTimeByNamespace($namespace)
             ];
         }
 
-        return isset($configuration['lifetime']) ?
-            (int) $configuration['lifetime'] : FrontendStorageConfigurationInterface::DEFAULT_LIFETIME;
+        return (int)$configuration['lifetime'] ?? FrontendStorageConfigurationInterface::DEFAULT_LIFETIME;
     }
 
     /**

app/code/Magento/Catalog/Helper/Image.php

@@ -859,7 +859,7 @@ public function getFrame()
      */
     protected function getAttribute($name)
     {
-        return isset($this->attributes[$name]) ? $this->attributes[$name] : null;
+        return $this->attributes[$name]?? : null;
     }
 
     /**

app/code/Magento/Catalog/Helper/Output.php

@@ -105,7 +105,7 @@ public function addHandler($method, $handler)
     public function getHandlers($method)
     {
         $method = strtolower($method);
-        return isset($this->_handlers[$method]) ? $this->_handlers[$method] : [];
+        return $this->_handlers[$method] ?? : [];
     }
 
     /**

app/code/Magento/Catalog/Model/Api/SearchCriteria/CollectionProcessor/ConditionProcessor/ConditionBuilder/NativeAttributeCondition.php

@@ -74,7 +74,7 @@ private function mapConditionType(string $conditionType, string $field): string
             ];
         }
 
-        return isset($conditionsMap[$conditionType]) ? $conditionsMap[$conditionType] : $conditionType;
+        return $conditionsMap[$conditionType] ?? $conditionType;
     }
 
     /**

app/code/Magento/Catalog/Model/Config.php

@@ -382,7 +382,7 @@ public function getProductTypeName($id)
 
         $this->loadProductTypes();
 
-        return isset($this->_productTypesById[$id]) ? $this->_productTypesById[$id] : false;
+        return $this->_productTypesById[$id] ?? false;
     }
 
     /**

app/code/Magento/Catalog/Model/Product/Option.php

@@ -312,7 +312,7 @@ public function getGroupByType($type = null)
             self::OPTION_TYPE_TIME => self::OPTION_GROUP_DATE,
         ];
 
-        return isset($optionGroupsToTypes[$type]) ? $optionGroupsToTypes[$type] : '';
+        return $optionGroupsToTypes[$type] ?? : '';
     }
 
     /**

app/code/Magento/Catalog/Model/Product/Option/Type/DefaultType.php

@@ -276,7 +276,7 @@ public function getFormattedOptionValue($optionValue)
      */
     public function getCustomizedView($optionInfo)
     {
-        return isset($optionInfo['value']) ? $optionInfo['value'] : $optionInfo;
+        return $optionInfo['value'] ?? $optionInfo;
     }
 
     /**

app/code/Magento/Catalog/Model/Product/Option/Validator/Pool.php

@@ -29,6 +29,6 @@ public function __construct(array $validators)
      */
     public function get($type)
     {
-        return isset($this->validators[$type]) ? $this->validators[$type] : $this->validators['default'];
+        return $this->validators[$type] ?? $this->validators['default'];
     }
 }

app/code/Magento/Catalog/Model/Product/Type.php

@@ -232,7 +232,7 @@ public function getOptions()
     public function getOptionText($optionId)
     {
         $options = $this->getOptionArray();
-        return isset($options[$optionId]) ? $options[$optionId] : null;
+        return $options[$optionId] ?? null;
     }
 
     /**

app/code/Magento/Catalog/Model/ResourceModel/Product/Collection.php

@@ -931,7 +931,7 @@ private function mapConditionType($conditionType)
             'eq' => 'in',
             'neq' => 'nin'
         ];
-        return isset($conditionsMap[$conditionType]) ? $conditionsMap[$conditionType] : $conditionType;
+        return $conditionsMap[$conditionType] ??  $conditionType;
     }
 
     /**

app/code/Magento/Catalog/Ui/Component/FilterFactory.php

@@ -71,8 +71,6 @@ public function create($attribute, $context, $config = [])
      */
     protected function getFilterType($attribute)
     {
-        return isset($this->filterMap[$attribute->getFrontendInput()])
-            ? $this->filterMap[$attribute->getFrontendInput()]
-            : $this->filterMap['default'];
+        return $this->filterMap[$attribute->getFrontendInput()] ?? $this->filterMap['default'];
     }
 }

app/code/Magento/Catalog/Ui/Component/Listing/Columns.php

@@ -80,6 +80,6 @@ public function prepare()
      */
     protected function getFilterType($frontendInput)
     {
-        return isset($this->filterMap[$frontendInput]) ? $this->filterMap[$frontendInput] : $this->filterMap['default'];
+        return $this->filterMap[$frontendInput] ??  $this->filterMap['default'];
     }
 }

app/code/Magento/Catalog/Ui/DataProvider/Product/Form/Modifier/Eav.php

@@ -853,7 +853,7 @@ private function getFormElementsMapValue($value)
     {
         $valueMap = $this->formElementMapper->getMappings();
 
-        return isset($valueMap[$value]) ? $valueMap[$value] : $value;
+        return $valueMap[$value] ?? $value;
     }
 
     /**

app/code/Magento/CatalogImportExport/Model/Import/Product/CategoryProcessor.php

@@ -232,7 +232,7 @@ public function clearFailedCategories()
      */
     public function getCategoryById($categoryId)
     {
-        return isset($this->categoriesCache[$categoryId]) ? $this->categoriesCache[$categoryId] : null;
+        return $this->categoriesCache[$categoryId] ?? null;
     }
 
     /**

app/code/Magento/CatalogImportExport/Model/Import/Product/SkuProcessor.php

@@ -142,7 +142,7 @@ public function getNewSku($sku = null)
     {
         if ($sku !== null) {
             $sku = strtolower($sku);
-            return isset($this->newSkus[$sku]) ? $this->newSkus[$sku] : null;
+            return $this->newSkus[$sku] ?? null;
         }
         return $this->newSkus;
     }

app/code/Magento/CatalogImportExport/Model/Import/Product/StoreResolver.php

@@ -75,7 +75,7 @@ public function getWebsiteCodeToId($code = null)
             $this->_initWebsites();
         }
         if ($code) {
-            return isset($this->websiteCodeToId[$code]) ? $this->websiteCodeToId[$code] : null;
+            return $this->websiteCodeToId[$code] ?? null;
         }
         return $this->websiteCodeToId;
     }
@@ -90,7 +90,7 @@ public function getWebsiteCodeToStoreIds($code = null)
             $this->_initWebsites();
         }
         if ($code) {
-            return isset($this->websiteCodeToStoreIds[$code]) ? $this->websiteCodeToStoreIds[$code] : null;
+            return $this->websiteCodeToStoreIds[$code] ?? null;
         }
         return $this->websiteCodeToStoreIds;
     }
@@ -119,7 +119,7 @@ public function getStoreCodeToId($code = null)
             $this->_initStores();
         }
         if ($code) {
-            return isset($this->storeCodeToId[$code]) ? $this->storeCodeToId[$code] : null;
+            return $this->storeCodeToId[$code] ??  null;
         }
         return $this->storeCodeToId;
     }
@@ -134,7 +134,7 @@ public function getStoreIdToWebsiteStoreIds($code = null)
             $this->_initStores();
         }
         if ($code) {
-            return isset($this->storeIdToWebsiteStoreIds[$code]) ? $this->storeIdToWebsiteStoreIds[$code] : null;
+            return $this->storeIdToWebsiteStoreIds[$code] ?? null;
         }
         return $this->storeIdToWebsiteStoreIds;
     }

app/code/Magento/CatalogInventory/Block/Adminhtml/Form/Field/Customergroup.php

@@ -84,7 +84,7 @@ protected function _getCustomerGroups($groupId = null)
             $this->_customerGroups[$notLoggedInGroup->getId()] = $notLoggedInGroup->getCode();
         }
         if ($groupId !== null) {
-            return isset($this->_customerGroups[$groupId]) ? $this->_customerGroups[$groupId] : null;
+            return $this->_customerGroups[$groupId] ?? null;
         }
         return $this->_customerGroups;
     }

app/code/Magento/CatalogInventory/Model/StockRegistryStorage.php

@@ -68,7 +68,7 @@ public function removeStock($scopeId = null)
      */
     public function getStockItem($productId, $scopeId)
     {
-        return isset($this->stockItems[$productId][$scopeId]) ? $this->stockItems[$productId][$scopeId] : null;
+        return $this->stockItems[$productId][$scopeId] ?? null;
     }
 
     /**
@@ -103,7 +103,7 @@ public function removeStockItem($productId, $scopeId = null)
      */
     public function getStockStatus($productId, $scopeId)
     {
-        return isset($this->stockStatuses[$productId][$scopeId]) ? $this->stockStatuses[$productId][$scopeId] : null;
+        return $this->stockStatuses[$productId][$scopeId] ?? null;
     }
 
     /**

app/code/Magento/CatalogRule/Observer/RulePricesStorage.php

@@ -22,7 +22,7 @@ class RulePricesStorage
      */
     public function getRulePrice($id)
     {
-        return isset($this->rulePrices[$id]) ? $this->rulePrices[$id] : false;
+        return $this->rulePrices[$id]) ?? false;
     }
 
     /**

lib/internal/Magento/Framework/DataObject/Copy/Config.php

@@ -44,6 +44,6 @@ public function getFieldset($name, $root = 'global')
         if (empty($fieldsets)) {
             return null;
         }
-        return isset($fieldsets[$name]) ? $fieldsets[$name] : null;
+        return $fieldsets[$name] ??  null;
     }
 }

lib/internal/Magento/Framework/View/Page/Config/Structure.php

@@ -251,6 +251,6 @@ public function populateWithArray(array $data)
      */
     private function getArrayValueByKey($key, array $array)
     {
-        return isset($array[$key]) ? $array[$key] : [];
+        return $array[$key] ??  [];
     }
 }

lib/internal/Magento/Framework/View/TemplateEngine/Xhtml/Compiler.php

@@ -122,7 +122,7 @@ public function postprocessing($content)
         return preg_replace_callback(
             '#' . $patternTag . '(.+?)' . $patternTag . '#',
             function ($match) {
-                return isset($this->data[$match[1]]) ? $this->data[$match[1]] : '';
+                return $this->data[$match[1]] ?? '';
             },
             $content
         );

setup/src/Magento/Setup/Fixtures/ImagesFixture.php

@@ -417,7 +417,7 @@ private function getImagesToGenerate()
     {
         $config = $this->fixtureModel->getValue('product-images', []);
 
-        return isset($config['images-count']) ? $config['images-count'] : null;
+        return $config['images-count'] ?? null;
     }
 
     /**
@@ -429,7 +429,7 @@ private function getImagesPerProduct()
     {
         $config = $this->fixtureModel->getValue('product-images', []);
 
-        return isset($config['images-per-product']) ? $config['images-per-product'] : null;
+        return $config['images-per-product'] ?? null;
     }
 
     /**

setup/src/Magento/Setup/Module/Setup/SetupCache.php

@@ -41,13 +41,9 @@ public function setField($table, $parentId, $rowId, $field, $value)
     public function get($table, $parentId, $rowId, $field = null)
     {
         if (null === $field) {
-            return isset($this->data[$table][$parentId][$rowId]) ?
-                $this->data[$table][$parentId][$rowId] :
-                false;
+            return $this->data[$table][$parentId][$rowId]) ?? false;
         } else {
-            return isset($this->data[$table][$parentId][$rowId][$field]) ?
-                $this->data[$table][$parentId][$rowId][$field] :
-                false;
+            return $this->data[$table][$parentId][$rowId][$field] ?? false;
         }
     }