how to pass a variable from one phtml to another?

Question

I have two phtml which have its own unique block file. I need to pass variable from one phtml to another.

PHTML 1

<?php 
$option_id = 20;
?>

<a href="<?php echo $baseUrl ?>/brandsmodules/index/demo" ></a>

PHTML 2

In this page is where I need to get the variable. I don't want to pass variables in URL as parameter due to security concerns.

Answer 1

You can send variable in URL like this to pass variable in another .phtml

In your PHTML 1

<?php $option_id = 20; ?>

<a href="<?php echo $this->getUrl('brandsmodules/index/demo', ['optionId' => $option_id]) ?>

In your PHTML 2

And you will get your optionId in another phtml by using $_GET['optionId'].

Please check and let me know if any question.

Answer 2

You can try

<?php echo $this->getLayout()->createBlock("Magento\Framework\View\Element\Template")->setKey('dfd')->setTemplate("VendorName_ModuleName::fileName.phtml")->toHtml(); ?>

print your value as

$block->getKey();

Answer 3

Inside your block class add two method.

1. setCustomData

2. getCustomData

public function setCustomData($data)
{
    $this->registry->register('custom_data', $data);
}

public function getCustomData()
{
    return $this->registry->registry('custom_data');
}

From first phtml, you set data like:

$block->setCustomData(12);

and from 2nd phtml, you can get data like:

$data = $block->getCustomData();

add $this->registry using DI. For example:

public function __construct(
    \Magento\Framework\Registry $registry
) {
    $this->registry = $registry;
}

Answer 4

In the first phtml .You can set the data in this way

<?= $block->getLayout()->createBlock(Vendor/ModuleName/Block/BlockFile::class)
    ->setTemplate("Vendor_ModuleName::template_file.phtml")
    ->setData('data', 10)
    ->toHtml() ?>

And In the second phtml ie (template_file.phtml) call the data in this way

 <?= $block->getData('data'); ?> //10

Hope it helps. Happy Coding !!