Magento 2.4.x: How to pass custom variable from controller to phtml file?

Why would you want to use a registry ? Is there a reason beyond this ?

You need to pass variables threw controller and block depending on how the templates is defined.

For example :

Template definition

<block class="Magento\Framework\View\Element\Template" name="magemastery.first.layout.example" template="MageMastery_FirstLayout::example.phtml" /> 

Passing the variable

public function execute() { /** @var Page $page */ $page = $this->resultFactory->create(ResultFactory::TYPE_PAGE); /** @var Template $block */ $block = $page->getLayout()->getBlock('magemastery.first.layout.example'); $block->setData('custom_parameter', 'Data from the Controller'); return $page; } 

Then in template : $block->getData('custom_parameter');

To get more details : https://magemastery.net/courses/magento-2-beginner/passing-data-from-controller-to-template

When you create your block with $block = $this->_view->getLayout()->createBlock('module\Block\Adminhtml\CustomBlock');, you can pass data to it using the 3rd argument to the createBlock function. For example:

 $block = $this->_view->getLayout()->createBlock('module\Block\Adminhtml\CustomBlock', 'block name', ['data' => ['MyData' => 'value']]); 

The data will then be accessible to your block through the $data array that is passed to it's constructor.

it's also possible by ajax call. By using that controller variable could be call in phtml file.

Phtml file

 <div id ="Div_id"></div> <script type="text/javascript"> require(['jquery', 'jquery/ui'],function($) { jQuery(function($){ $(document).ready(function(){ var customurl = '<?= $block->getBaseUrl()."ultimatefaq/index/data";?>'; $.ajax({ url: customurl type: 'POST', dataType: 'json' }).done(function( ControllerVariable ) { jQuery("Div_id").append(ControllerVariable }); }); }); }); 

Controller file

<?php namespace vendor\module\Controller\Data; use Magento\Framework\Controller\ResultFactory; use Magento\Framework\App\Action\Action; use Magento\Framework\App\Action\Context; class Data extends Action { protected $_coreRegistry = null; protected $request; protected $resultPageFactory; protected $layoutFactory; public function __construct( Context $context, \Magento\Framework\View\Result\PageFactory $resultPageFactory, \Magento\Framework\Registry $registry, \Magento\Framework\View\LayoutFactory $layoutFactory ) { $this->resultPageFactory = $resultPageFactory; $this->layoutFactory = $layoutFactory; parent::__construct($context); } /** * To create controller function * @return variable */ public function execute() { $data = "Controller Data that woulde be dispalyed on phtml"; $resultJson = $this->resultFactory->create(ResultFactory::TYPE_JSON); $result = $resultJson->setData($data); return $result; } 

}

I hope it will work perfectely!

You can do it with static variable like below.

Controller class.

<?php namespace Vendorname\Modulename\Controller\Index; use Magento\Framework\App\Action\Action; use Magento\Framework\App\Action\Context; use Magento\Framework\View\Result\PageFactory; class Index extends Action { protected $pageFactory; protected $blockdata; public function __construct( Context $context, PageFactory $pageFactory, \Vendorname\Modulename\Block\Index\Index $blockdata ) { $this->pageFactory = $pageFactory; $this->blockdata = $blockdata; parent::__construct($context); } public function execute() { $page = $this->pageFactory->create(); //$objectManager = \Magento\Framework\App\ObjectManager::getInstance(); //$productCollection = $objectManager->create('Magento\Catalog\Model\ResourceModel\Product\Collection'); //$collection = $productCollection->addAttributeToSelect('*')->load(); $collection = 'yourvariable'; $this->blockdata->setColl($collection); return $page; } } 

Your Block class would be like.

<?php declare(strict_types=1); namespace Vendorname\Modulename\Block\Index; class Index extends \Magento\Framework\View\Element\Template { private static $coll; public function __construct( \Magento\Framework\View\Element\Template\Context $context, array $data = [] ) { parent::__construct($context, $data); } public function setColl($c) { self::$coll = $c; } public function getCustomdata() { $coll = self::$coll; return $coll; } } 

And In use in phtml file from Block.

<?php echo $block->getCustomdata(); ?> 

I had to work on same requirement and i achieved as below.

Controller Class

namespace Vendor\Module\Controller\Index; use Magento\Framework\App\Action\Action; use Magento\Framework\App\Action\Context; use Magento\Framework\App\RequestInterface; use Magento\Framework\View\Result\PageFactory; class Index extends Action { private PageFactory $pageFactory; private RequestInterface $request; public function __construct( Context $context, PageFactory $pageFactory, RequestInterface $request ) { parent::__construct($context); $this->pageFactory = $pageFactory; $this->request = $request; } public function execute() { $this->request->setParams(['data1' => 'value1', 'data2' => 'value2']); return $this->pageFactory->create(); } } 

Frontend Layout XML

<?xml version="1.0"?> <page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd"> <body> <referenceContainer name="content"> <block class="Vendor\Module\Block\Index" name="index" template="Vendor_Module::index.phtml" /> </referenceContainer> </body> 

Block Class

Vendor\Module\Block\Index.php

namespace Vendor\Module\Block; use Magento\Framework\App\RequestInterface; use Magento\Framework\View\Element\Template; use Magento\Framework\View\Element\Template\Context; class Index extends Template { private RequestInterface $request; public function __construct( Context $context, RequestInterface $request, array $data = [] ) { parent::__construct($context, $data); $this->request = $request; } public function getControllerData() { return $this->request; } } 

In Index.phtml file

You can get Data as below

<?php /* @var Vendor\Module\Block\Index $block */ $controllerData = $block->getControllerData(); print_r($controllerData->getParams()); 

Hope it helps!!