how- to pass dynamic variable-between blocks in magento

Question

how- to pass dynamic variable-from a parent block to childchild block. Is there a method like this? getChildChild(), so that I can setData .

$this->getChildChild('container2')->setData('pro_id',$var);
echo $this->getChildChildHtml('container2', '', false, true) ;

Answer 1

Absolutely you can do this by loading the block and then calling either assign or setData on it.

In PHP

$this->getLayout()->getBlock('block_name')->setData('user', Mage::getModel('mymodule/user')->load($this->getUserId())); 

Or in XML

<block type="mymodule/user" name="block_name">
  <action method="setUserId"><user_id>string_goes_here</user_id></action>
</block>

More reading:

https://magento.stackexchange.com/a/933/336