Use of Magento Registry Variable

The Main Advantage of using Magento is because of its registry methods. Registry is a term which is the method of registering or creating a new variable which you can use it later on the functionalities or methods you want to make use of those variables. You can able to use that variable anywhere to get the stored values back.

There are three registry methods available in magento which are listed below

1.  Mage::register

You can register a variable using this register method

Syntax:

Mage::register(‘keyvalue’, $variablename);

Example

For example, I am going to load the product using product id and get all the product details and I register that product details in a variable which I can use it later on to my code

$product_id = ‘23’;$_product = Mage::getModel(‘catalog/product’)->load($product_id);Mage::register(‘product’, $_product);

2.  Mage::registry

This Registery method is used for fetching the registered variable

Syntax:

$newvariable = Mage::registry(‘keyvalue’);

Example

In previous method, we register a product details. In this method we can fetch the registered value.

$productdetails = Mage::registry(‘product’);//This keyalue should be same as that of the variable which we used to register.

3.  Mage::unregister

This Method is used to unregister the variable which is registered

Syntax:

Mage::unregister(‘keyvalue’);

Example:

After fetching all the product details, if we want to remove the values from the stored registry we can use this method.

Mage::unregister(‘product’);