You can configure the variable with register
from the first phtml, then you get the value in the second phtml with registry
To do things right without directly injecting the objectManager into phtml, you must create some function in your product block, therefore:
In your block: app/code/Vendor/Modulename/Block/Custom.php
assuming its variable name is: $tech
_coreRegistry = $coreRegistry;
}
/**
* Set var data
*/
public function setTechData($data)
{
$this->_coreRegistry->register('tech', $data);
}
/**
* Get var data
*/
public function getTechData()
{
return $this->_coreRegistry->registry('tech');
}
}
Then in your first phtml:
setTechData($tech); ?>
In the second phtml:
getTechData(); ?> //you'll get your tech value here
You can do it in phtml to proof Without the block solution:
First phtml:
create("MagentoFrameworkRegistry")->register('tech', $tech);
?>
Second phtml:
create("MagentoFrameworkRegistry")->registry('tech');
echo $techData;
?>