Replaced is_null with null ===

Author: ihorvansach

Block/Post/View/RelatedProducts.php

@@ -104,7 +104,7 @@ public function displayProducts()
      */
     public function getItems()
     {
-        if (is_null($this->_itemCollection)) {
+        if (null === $this->_itemCollection) {
             $this->_prepareCollection();
         }
         return $this->_itemCollection;

Block/Sidebar/Archive.php

@@ -46,7 +46,7 @@ protected function _preparePostCollection()
      */
     public function getMonths()
     {
-        if (is_null($this->_months)) {
+        if (null === $this->_months) {
             $this->_months = [];
             $this->_preparePostCollection();
             foreach ($this->_postCollection as $post) {

Model/AdminNotificationFeed.php

@@ -76,7 +76,7 @@ public function __construct(
      */
     public function getFeedUrl()
     {
-        if (is_null($this->_feedUrl)) {
+        if (null === $this->_feedUrl) {
             $this->_feedUrl = 'https://mage'.'fan'
             .'.c'.'om/community/notifications'.'/'.'feed/';
         }

Model/Comment.php

@@ -238,7 +238,7 @@ public function getParentComment()
      */
     public function getChildComments()
     {
-        if (is_null($this->comments)) {
+        if (null === $this->comments) {
             $this->comments = $this->commentCollectionFactory->create()
                 ->addFieldToFilter('parent_id', $this->getId());
         }

Model/Post.php

@@ -625,7 +625,7 @@ public function getOgImage()
      */
     public function getParentCategories()
     {
-        if (is_null($this->_parentCategories)) {
+        if (null === $this->_parentCategories) {
             $this->_parentCategories = $this->_categoryCollectionFactory->create()
                 ->addFieldToFilter('category_id', ['in' => $this->getCategories()])
                 ->addStoreFilter($this->getStoreId())
@@ -671,7 +671,7 @@ public function getCategoriesCount()
      */
     public function getRelatedTags()
     {
-        if (is_null($this->_relatedTags)) {
+        if (null === $this->_relatedTags) {
             $this->_relatedTags = $this->_tagCollectionFactory->create()
                 ->addFieldToFilter('tag_id', ['in' => $this->getTags()])
                 ->addActiveFilter()

Model/ResourceModel/Category.php

@@ -141,7 +141,7 @@ protected function _afterSave(\Magento\Framework\Model\AbstractModel $object)
      */
     public function load(\Magento\Framework\Model\AbstractModel $object, $value, $field = null)
     {
-        if (!is_numeric($value) && is_null($field)) {
+        if (!is_numeric($value) && null === $field) {
             $field = 'identifier';
         }
 

Model/ResourceModel/Post.php

@@ -274,7 +274,7 @@ protected function _updateLinks(
      */
     public function load(\Magento\Framework\Model\AbstractModel $object, $value, $field = null)
     {
-        if (!is_numeric($value) && is_null($field)) {
+        if (!is_numeric($value) && null === $field) {
             $field = 'identifier';
         }
 

Model/ResourceModel/Tag.php

@@ -93,7 +93,7 @@ protected function _beforeSave(\Magento\Framework\Model\AbstractModel $object)
      */
     public function load(\Magento\Framework\Model\AbstractModel $object, $value, $field = null)
     {
-        if (!is_numeric($value) && is_null($field)) {
+        if (!is_numeric($value) && null === $field) {
             $field = 'identifier';
         }