Magento 2 - Call phtml in helper

Question

I have found multiple threads related to calling helper function in .phtml.

But I have a case where I need to call phtml file in helper and return HTML.

I have used this code:

//Where $this->_resultPageFactory is the object of \Magento\Framework\View\Result\PageFactory
$resultPage = $this->_resultPageFactory->create();
$html = $resultPage->getLayout()
            ->createBlock("Vendor\Module\Block\Index")
            ->setTemplate("Vendor_Module::index.phtml")
            ->toHtml();
return $html;

It is working fine, but the problem is, it is effecting other stuff like Product title, Media gallery etc (it is changed after using above code)

So, how can I call .pthml from helper?

Answer 1

I have figured out the solution. Copied from gift-card module (Enterprise)

For variables in constructor

protected $_layout;

public function __construct(
    ...
    \Magento\Framework\View\LayoutInterface $layout
    ...
) {
    $this->_layout = $layout;
    ...
}

Now in any of the function where you want to call phtml, use this:

$block = $this->_layout->createBlock(\Vendor\Module\Block\Index::class);
$block->setTemplate("Vendor_Module::index.phtml");
return $block;

Answer 2

You can use this:

$block = $this->_layout->createBlock(\Vendor\Module\Block\Index::class);
$block->setTemplate("Vendor_Module::index.phtml");
return $block;

Where $this->_layout is the instance of \Magento\Framework\View\LayoutInterface