How to set,retrieve unset session in Magento 2

Hi everyone, in this tutorial, we will discuss about how to set, retrieve unset session in Magento 2 which help you to build as well as eliminate the session by the quick way through implementing the code. Because with the custom Magento 2 development, it is very essential to learn about the session

These are some list of session types in Magento 2

vendor/magento/module-checkout/Model/Session.php

vendor/magento/module-catalog/Model/Session.php

vendor/magento/module-newsletter/Model/Session.php

vendor/magento/module-persistent/Model/Session.php

vendor/magento/framework/Message/Session.php

vendor/magento/module-customer/Model/Session.php

vendor/magento/module-backend/Model/Session.php

vendor/magento/module-checkout/Model/Session.php

Subsequently, you will compose calling Catalog, Customer, and Checkout sessions during the following code.

{
 $this->_catalogSession = $catalogSession;
 $this->_checkoutSession = $checkoutSession;
 $this->_customerSession = $customerSession;
 parent::__construct($context, $data);
 }

 public function _prepareLayout()
 {
 return parent::_prepareLayout();
 }

 public function getCatalogSession()
 {
 return $this->_catalogSession;
 }

 public function getCustomerSession()
 {
 return $this->_customerSession;
 }

 public function getCheckoutSession()
 {
 return $this->_checkoutSession;
 }
}
?>

Subsequently, with Catalog, Customer, and Checkout sessions, it is viable to locate them from .phtml file.

$block->getCatalogSession()->setMyName('Webnexs');
echo $block->getCatalogSession()->getMyName() . '<br />'; // output: Webnexs


$block->getCheckoutSession()->setTestData('Hello World');
echo $block->getCheckoutSession()->getTestData() . '<br />'; // output: Hello World

$block->getCheckoutSession()->setTestHello('Test Hello Value');
echo $block->getCheckoutSession()->getTestHello() . '<br />'; // output: Test Hello Value

Follow the below code, in case you want to unset those sessions:

$block->getCatalogSession()->unsMyName();
$block->getCheckoutSession()->unsTestData();
$block->getCustomerSession()->unsTestHello();

Mainly, Customer session authorize gathering the customer information like customer name and email.

// get customer data
if ($block->getCustomerSession()->isLoggedIn()) {
 $customerId = $block->getCustomerSession()->getCustomerId();
 $customerData = $block->getCustomerSession()->getCustomer();
 echo $customerId . '<br />';
 echo $customerData->getFirstname() . ' ' . $customerData->getLastname() . '<br />';
 echo $customerData->getEmail() . '<br />';
 print_r($block->getCustomerSession()->getCustomer()->getData());
}

Checkout session will show the quote information

// get checkout session data
echo $block->getCheckoutSession()->getQuoteId();
print_r($block->getCheckoutSession()->getQuote()->getData());

The above mentioned steps assist you to set, retrieve unset session in Magento 2.