In magento registry pattern is allows any object or data to be available in a public global scope for any resource to use. In magento you can set and get any object and data via registry pattern.
You can register an object or data like below :
<?php Mage::register('identifier', $object_or_data);?>
After it is registered, you can call like below :
<?php Mage::registry('identifier');?>
You can also unregister an object at any time like below :
<?php Mage::unregister('identifier');?>
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