Magento 2：设置未设置获取会话

本文介绍如何在Magento 2中创建和销毁不同类型的会话（结帐，客户，目录）。

如下所示，Magento 2中存在不同类型的会话类。

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

在下面的示例代码中，我将处理Catalog，Customer和Checkout会话。

依赖注入和对象管理器的编码方式如下所示。

使用依赖注入（DI）

<?php
namespace Chapagain\HelloWorld\Block;
class HelloWorld extends \Magento\Framework\View\Element\Template
{    
    protected $_catalogSession;
    protected $_customerSession;
    protected $_checkoutSession;
        
    public function __construct(
        \Magento\Backend\Block\Template\Context $context,        
        \Magento\Catalog\Model\Session $catalogSession,
        \Magento\Customer\Model\Session $customerSession,
        \Magento\Checkout\Model\Session $checkoutSession,
        array $data = []
    )
    {        
        $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;
    }    
}
?>

现在，我们设置并从模板（.phtml）文件获取会话。

$block->getCatalogSession()->setMyName('Mukesh Chapagain');
echo $block->getCatalogSession()->getMyName() . '<br />'; // output: Mukesh Chapagain
 
$block->getCheckoutSession()->setTestData('123');
echo $block->getCheckoutSession()->getTestData() . '<br />'; // output: 123
 
$block->getCustomerSession()->setTestHello('456');
echo $block->getCustomerSession()->getTestHello() . '<br />'; // output: 456

取消会话

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

从客户会话中，我们还可以获取客户信息，例如客户名称和电子邮件。

// 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());
}

从结帐会话中，我们可以获取报价信息。

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

使用对象管理器

$objectManager =  \Magento\Framework\App\ObjectManager::getInstance();        
 
$catalogSession = $objectManager->get('\Magento\Catalog\Model\Session');
$customerSession = $objectManager->get('\Magento\Customer\Model\Session');
$checkoutSession = $objectManager->get('\Magento\Checkout\Model\Session');
 
// set session variables and their value
$catalogSession->setMyName('Mukesh Chapagain');
$checkoutSession->setTestData('123');
$customerSession->setTestHello('456');
 
// print session variables value
echo $catalogSession->getMyName() . '<br />'; // output: Mukesh Chapagain
echo $checkoutSession->getTestData() . '<br />'; // output: 123
echo $customerSession->getTestHello() . '<br />'; // output: 456
 
// Unset session
$catalogSession->unsMyName();
$checkoutSession->unsTestData();
$customerSession->unsTestHello();

希望这可以帮助。谢谢