[2.3] changed intval($val) to (int) $val, since (int) $val is faster.

app/code/Magento/Backend/Block/Widget/Button/ButtonList.php

@@ -127,8 +127,8 @@ public function getItems()
      */
     public function sortButtons(Item $itemA, Item $itemB)
     {
-        $sortOrderA = intval($itemA->getSortOrder());
-        $sortOrderB = intval($itemB->getSortOrder());
+        $sortOrderA = (int) $itemA->getSortOrder();
+        $sortOrderB = (int) $itemB->getSortOrder();
 
         if ($sortOrderA == $sortOrderB) {
             return 0;

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

@@ -83,7 +83,7 @@ public function add(Item $item, $parentId = null, $index = null)
             }
             $parentItem->getChildren()->add($item, null, $index);
         } else {
-            $index = intval($index);
+            $index = (int) $index;
             if (!isset($this[$index])) {
                 $this->offsetSet($index, $item);
                 $this->_logger->info(

app/code/Magento/Backup/Model/Config/Backend/Cron.php

@@ -76,8 +76,8 @@ public function afterSave()
 
         if ($enabled) {
             $cronExprArray = [
-                intval($time[1]),                                 # Minute
-                intval($time[0]),                                 # Hour
+                (int) $time[1],                                 # Minute
+                (int) $time[0],                                 # Hour
                 $frequency == $frequencyMonthly ? '1' : '*',      # Day of the Month
                 '*',                                              # Month of the Year
                 $frequency == $frequencyWeekly ? '1' : '*',        # Day of the Week

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

@@ -556,7 +556,7 @@ public function updateQtyOption($options, \Magento\Framework\DataObject $option,
      */
     public function prepareQuoteItemQty($qty, $product)
     {
-        return intval($qty);
+        return (int) $qty;
     }
 
     /**

app/code/Magento/Catalog/Block/Adminhtml/Product/Edit/Action/Attribute/Tab/Inventory.php

@@ -74,7 +74,7 @@ public function getFieldSuffix()
     public function getStoreId()
     {
         $storeId = $this->getRequest()->getParam('store');
-        return intval($storeId);
+        return (int) $storeId;
     }
 
     /**

app/code/Magento/Catalog/Block/Product/ProductList/Upsell.php

@@ -7,7 +7,6 @@
 namespace Magento\Catalog\Block\Product\ProductList;
 
 use Magento\Catalog\Model\ResourceModel\Product\Collection;
-use Magento\Framework\View\Element\AbstractBlock;
 
 /**
  * Catalog product upsell items block
@@ -170,8 +169,8 @@ public function getRowCount()
      */
     public function setColumnCount($columns)
     {
-        if (intval($columns) > 0) {
-            $this->_columnCount = intval($columns);
+        if ((int) $columns > 0) {
+            $this->_columnCount = (int) $columns;
         }
         return $this;
     }
@@ -213,8 +212,8 @@ public function getIterableItem()
      */
     public function setItemLimit($type, $limit)
     {
-        if (intval($limit) > 0) {
-            $this->_itemLimits[$type] = intval($limit);
+        if ((int) $limit > 0) {
+            $this->_itemLimits[$type] = (int) $limit;
         }
         return $this;
     }

app/code/Magento/Catalog/Model/Indexer/Category/Flat/AbstractAction.php

@@ -7,7 +7,6 @@
 namespace Magento\Catalog\Model\Indexer\Category\Flat;
 
 use Magento\Framework\App\ResourceConnection;
-use Magento\Framework\EntityManager\MetadataPool;
 
 class AbstractAction
 {
@@ -111,7 +110,7 @@ public function getColumns()
     public function getMainStoreTable($storeId = \Magento\Store\Model\Store::DEFAULT_STORE_ID)
     {
         if (is_string($storeId)) {
-            $storeId = intval($storeId);
+            $storeId = (int) $storeId;
         }
 
         $suffix = sprintf('store_%d', $storeId);

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

@@ -494,7 +494,7 @@ public function resize()
      */
     public function rotate($angle)
     {
-        $angle = intval($angle);
+        $angle = (int) $angle;
         $this->getImageProcessor()->rotate($angle);
         return $this;
     }