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what is plugin magento 2 or what is interceptor in magento 2

Magento 2 is a powerful and flexible e-commerce platform that offers a variety of customization options to developers. One of the key features that enables this flexibility is the use of plugins, also known as interceptors, which allow developers to modify the behavior of core classes without changing their original code.

    What is a plugin?

    In Magento 2, a plugin is a class that intercepts the execution of a public method in another class, allowing developers to modify or extend its functionality. Plugins work by defining before, after, or around methods that are executed along with the original method. Before plugins are executed before the original method and can be used to modify the input parameters or prevent the original method from executing altogether. After plugins are executed after the original method and can be used to modify the output or perform additional actions based on the result. Around plugins wrap the original method and can be used to modify both the input and output parameters or perform additional actions before and after the method is executed.

    How to create a plugin in Magento 2?

    To create a plugin in Magento 2, you need to follow these steps:

    • Create a new PHP class that extends the Magento\Framework\Interception\AbstractInterceptor class.
    • Implement the intercept() method, which contains the code that will be executed when the plugin is called.
    • Define the plugin's configuration in the di.xml file, which is located in the module's etc directory.
    • Register the plugin by adding a plugin declaration to the di.xml file.
    • For example, suppose you want to add additional validation to the customer registration process. In that case, you can create a plugin that intercepts the Magento\Customer\Model\AccountManagement class's createAccount() method and adds the necessary validation logic. Here's an example implementation:

      namespace Vendor\Module\Plugin; 
      use Magento\Framework\Interception\AbstractInterceptor; 
      use Magento\Framework\Interception\InterceptorInterface;
      use Magento\Framework\App\RequestInterface; 
      use Magento\Framework\App\ResponseInterface; 
      class CustomerAccountManagementPlugin extends AbstractInterceptor implements InterceptorInterface 
      public function intercept
      (\Magento\Customer\Model\AccountManagement $subject, \Closure $proceed, RequestInterface $request, ResponseInterface $response)
      // Add custom validation logic here if (!$request->getParam('agree_to_terms')) 
      throw new \Exception(__('Please agree to the terms and conditions.'));
      } // Call the original method $result = $proceed($request, $response);
      // Add custom post-processing logic here if ($result->getCustomerId()) 
      // Do something here } return $result;

      In this example, the intercept() method first adds custom validation logic to the registration request and then calls the original createAccount() method using the $proceed parameter. After the original method is executed, the intercept() method adds additional post-processing logic based on the result.

      To register the plugin, you need to add a plugin declaration to the di.xml file, which should be located in the module's etc directory. Here's an example of how to register the above plugin:

      <config xmlns:xsi="" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
      <type name="Magento\Customer\Model\AccountManagement">
      <plugin name="customer_account_management_plugin" type="Vendor\Module\Plugin\CustomerAccountManagementPlugin" sortOrder="1"/>

      In this example, the plugin declaration specifies the name of the plugin, the class that implements the plugin, and the order in which the plugin should be executed relative to other plugins. The sortOrder attribute is optional but can be used to control the order in which multiple plugins are executed.

    Why use plugins in Magento 2?

    Plugins offer several benefits for developers working with Magento 2:

    • Flexibility: Plugins allow developers to modify the behavior of core classes without changing their original code, making it easier to customize Magento 2's behavior to suit specific business needs.
    • Modularity: Plugins can be added or removed from the system easily, allowing developers to experiment with different functionality and configurations.
    • Interoperability: Plugins work with any class that implements the Magento\Framework\Interception\InterceptorInterface interface, making it possible to integrate third-party modules seamlessly.
    • Testability: Because plugins intercept the execution of existing code, they can be easily tested in isolation, ensuring that they work correctly before being deployed in a production environment.


    Plugins, also known as interceptors, are a powerful feature of Magento 2 that allow developers to modify the behavior of core classes without changing their original code. By intercepting the execution of a method and adding additional functionality, developers can create customizations and integrations that would be difficult or impossible to achieve otherwise. If you're working with Magento 2, plugins are an essential tool in your development toolkit, and mastering their use will help you create flexible, modular, and interoperable code that meets your business needs.

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