Ttdfjt

I have used two template for homepage(template inside another template)
I am calling product template inside category template.
Now my case scenario is

1. I am declaring one array in category template

2. I want to pass this empty array to product template.

3. Add elements in that array in product template.

4. Pass the array back to category template.

How can i do that.

Let me know if there is any confusion.

Try this it's worked for me.

<?php echo $this->getLayout()->createBlock("MagentoFrameworkViewElementTemplate")->setKey('test')->setTemplate("Vendor_Module::test.phtml")->toHtml(); ?>

to get value use

echo $this->getKey();

As per your actual requirement, in first phtml file add below code :

$arr=array(23,4); 

echo $this->getLayout()->createBlock("VendorModulenameBlockDisplay")->setData('var1', $arr)->setTemplate("Vendor_Modulename::test2.phtml")->toHtml();

In second phtml i.e. test2.phtml add

$catIds=$block->getData("var1"); 

$arr=array(); 

foreach($catIds as $catId) 
 $_productCollection=$block->setCustomValue($catId); 

 foreach ($_productCollection as $_product) 
 $currentId=$_product->getId(); 
 if (!in_array($currentId, $arr)) 
 echo $_product->getData("name");echo "<br/>"; 
 
 $arr[]=$_product->getId(); 
 

In app/code/Vendor/Modulename/Block/Display.php add below code:

 protected $_productCollectionFactory;
 protected $_categoryFactory;

 public function __construct(
 MagentoCatalogModelResourceModelProductCollectionFactory 
 $productCollectionFactory,
 MagentoCatalogModelCategoryFactory $categoryFactory,
 MagentoFrameworkViewElementTemplateContext $context
 ) 
 $this->_categoryFactory = $categoryFactory;
 $this->_productCollectionFactory = $productCollectionFactory;
 parent::__construct($context);
 
 public function setCustomValue($value) 
 
 $categoryId = $value; 
 $category = $this->_categoryFactory->create()->load($categoryId); 
 $collection = $this->_productCollectionFactory->create(); 
 $collection->addAttributeToSelect('*'); 
 $collection->addCategoryFilter($category); 
 $collection->addAttributeToFilter('visibility', MagentoCatalogModelProductVisibility::VISIBILITY_BOTH); 
 $collection->addAttributeToFilter('status', MagentoCatalogModelProductAttributeSourceStatus::STATUS_ENABLED); 
 return $collection;